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\"House\" or \"stay\", entangled in the hearts of the part of the new parents on cord blood. Cord blood for self-preservation, to be called \"life insurance\". However, in the eyes of others, this \"insurance\" does not like the imagination of so foolproof

Rule of law over the weekend, reporter Wei Wenjie

Seeing his wife\\ s growing belly, the perinatal period ever nearer, the joy I, the prospective father Chu Ming\\ s heart over hair tangled.

November 20, while the weekends free, who lives in Tongzhou District, Beijing, Chu Ming invited the parents of both sides, held a family meeting.

Issues only one umbilical cord blood of children born (hereinafter referred to as umbilical cord blood) is donated free of charge, or self-preservation.

Umbilical cord blood stem cells are a hot topic in the field of biotechnology in recent years.

Be described as: \"The cord blood contains hematopoietic stem cells can rebuild the human hematopoietic and immune systems, can be used for hematopoietic stem cell transplantation, treatment of many diseases.\"

Thus, umbilical cord blood for autologous preservation, known as a \"life insurance\" for the children to buy.

Left in the umbilical cord blood, the waste of previous postpartum, was widely advertised triggered by the most direct wave is 13,000 yuan, 16,000 yuan, 17,600 or even up to 20,000 yuan of varying amounts of cord blood autologous save costs.

Chu Ming tangled, some cord blood saved from the body seen as gods, some people will be killed by one of the stick; Some people even want others to donate yourself.

Medical experts in the industry, there are many factions and argument.

The reality is that started in the cord blood to save the business in 2001, the last year or two heat spiraling.

Rising self-existence and the number of cord blood

\"We donate, is kept? Exist where?\"

The face of all of both parents, said in Guangzhou, Tianjin and Beijing, three cord blood stem cell bank (the Cord Blood Bank), and distribute them to the elders at the same time, Chu Ming also comes with on this tangled endless mind.

\"In fact, I know to the children, save the cord blood, especially accidental.\"

Chu told the \"rule of law over the weekend,\" the reporter in March of this year, the couple back to Guangzhou to visit relatives, during which one and a half months pregnant wife uncomfortable. To prevent accidents, to accompany his wife to go to the Beijing Maternity Hospital to check, he was the men stop \"licensing stand outside in the obstetric clinic. Obstetric clinic next to the Cord Blood Bank, \"the desk, counselors need to talk about the benefits of cord blood stem cells and storage, he readily took a brochure looks.

\"I am a little nervous, waiting for his wife when they have nothing to do, \\ Cord Blood Bank\\ in this scenario it is easy to capture my attention.\" Chu describes himself and umbilical cord blood saved acquaintance process.

To learn more about the situation in this regard, Chu Ming went to Guangzhou to visit and travel to Tianjin, the way to visit two local cord blood bank, and back to the promotional materials.

Save nowadays is gradually warming up umbilical cord blood of autologous cord blood bank, deputy director of Liaoning Province, Wang Qiu, the explanation given is that the cord blood donated from the body to retain the storage sites in the cord blood bank.

Nationally approved 8 (Beijing, Tianjin, Shanghai, Guangdong, Sichuan, Shandong, Liaoning, Zhejiang) Cord Blood Bank is basically the same form, is divided into public libraries and autologous library. The public release of the inventory free of charge donated cord blood donors do not need to pay custody fees, enjoy typing priority. Autologous inventory put to voluntarily pay the storage of cord blood for newborn or family. In the actual store, public library and autologous library was not significantly different.

First home patients, the other is security and peace. \"Beijing Academy of Military Medical Sciences, Institute of Basic Medical Tangpei string, the researchers said.

Save the cord blood of Shenyang started in 2002, that year, the cord blood bank in Liaoning Province Liaoning Cord Blood Bank (hereinafter referred to) was approved.

Cord Blood Bank in addition to Liaoning in Shenyang, autologous cord blood to save the business, as well as Tianjin Cord Blood Bank.

2002 Tianjin Cord Blood Bank, established in Shenyang and Dalian office. \"High Cord Blood Bank, Tianjin, Liaoning large district manager to red told reporters the number of Liaoning, Tianjin Cord Blood Bank autologous saved,\" the total of how many of the commercial confidential, has been set up offices, and we signed a number of self-preservation agreement has been relatively stable, the whole Liaoning month about 100. \"

Wang Qiu grasp of figures, the the Liaoning cord blood bank cord blood preservation ratio is 1/4, four persons inside, a person carrying out self-preservation, and the other is donated.

The same cord blood bank in Huairou salesman license, rather than explain in detail the professional knowledge, far less to attract people to save the cord blood as simple.

In the afternoon of November 20, the license to tell the \"rule of law over the weekend,\" the reporter from the perspective of the last two years, the Huairou self-existence and the number of cord blood every year, up 20-30% of the number of increments. She apparently can feel self-existence and the number is far greater than the number of donations.

Licensing of this argument, the next afternoon reporter visited Beijing Cord Blood Bank, liquid nitrogen tank, has also been confirmed by an entourage: \"the busiest time of self-preservation of cord blood a day over one hundred.\"

Tianjin Cord Blood Bank, director of Wang Xuejun, umbilical cord blood preservation is a trend: Shenyang, Tianjin Cord Blood Bank, I do not know self-preservation of specific figures, but some thousands of people. \"

Qualified cord blood is only half

November 17 to 21, the \"rule of law over the weekend reporter in Beijing maternal relative concentration of several hospitals, random access of 32 expectant, postpartum pregnant women. Among them there are 3 people signed a cord blood bank cord blood autologous save the agreement and pay varying amounts of storage of the test fee; 15 people decided to donate; 14 were neither donate nor to stay, a person want others to donate and yourself .

The only commonality is that many differences in the 32 respondents: umbilical cord blood storage, the application does not fully understand.

The 33-year-old Miss Xu to the children in the 2007 production of preserved cord blood. Reporter to interview her, admitted that \"I know this thing, but not much\".

Miss Xu on the attitude of umbilical cord blood preservation, \"there is no use, anyway saved. 1% of hope, they do a 100% effort., You can also donate to their children and their families do not have access.\"

Ministry of Health, cord blood stem cell bank Expert Committee Professor Liu Kaiyan in an interview that: \"for cord blood saved from the body, neither can boast, like a panacea, nor can its devoid of any merit.\"

But most people confined to the professional knowledge, cord blood since the body is retained, leaving the cord blood is not very clear.

To stay inside the stem cells useful nucleated cells, rather than blood. \"Wang Qiu points to the core content of cord blood autologous reservations.

Umbilical cord blood saved since the body, separated from the collected stem cells until the last frozen storage, during any part of a negligence that this cord blood may be scrapped.

Accordance with the standards, the separation of hematopoietic stem cells be completed within 24 hours. \"LIU Kai-yan said the 24-hour processing period is key to ensure that their activity in the cells frozen.

Whether autologous reservations or donations tested, separation, preparation, freezing a series of procedures, qualified cord blood stem cells in order to save.

Wang Qiu for this process, a more detailed description: After stripping of the umbilical cord by specialized physicians trained to carry out blood separation of hematopoietic stem cells in cord blood sent to the blood bank into the GMP laboratory clean room, to retain the specimens tested. Add cryoprotectants, programmable cooling, and eventually stored in -196 ° C liquid nitrogen.

In addition to the time limit outside, to after the separation of hematopoietic stem cells add a certain amount of frozen protection agent also very critical, \"we freeze in the refrigerator, the meat cells is the death of Wang Qiu life examples popularly explain the cryoprotectants to prevent the cells to be frozen die.

\"I cord blood volume, the quality of preservation is certainly fine.\" Mostly autologous Save those who believe that as long as the blood is adequate, future children in case the disease can be cured.

In the professional field, the above understanding of the public is clearly some misunderstanding, because ultimately can not save is the number of cells subject to the storage cell count standards off the assembly line is 8 multiplied by 10 ^ 8, \"This is a generic standard not the country\\ s ministerial (medicines normalized before the administration of the Ministry of Health, later points out to the establishment of the State Drug Administration and was owned by the Ministry of Health when the tube standard referred to as the ministerial standard) standard. \"Wang Qiu said.

Wang Qiu impression \"in accordance with the formula, the number of cells contained in this standard can give a weight of 32 kg, 10-year-old to 12-year-old child for transplant.\", The collection of cord blood, most of the content of a number of cells can give a 68 kg child for transplant, and normal cell content of about 50 kg for transplantation.

\"It is a way to autologous save for the one-child anticipatory, but can only be applied to non-congenital and hereditary diseases.\" Wang Qiu think that one can not ignore the objective facts.

The rule of law over the weekend, reporter learned that, In 2009, the northern province Cord Blood Bank collected more than 3,000 umbilical cord blood, through a series of tests, only 1194 were eligible, while over 1000 were unqualified. Qualified cord blood, the autologous save 341, donated 853 copies.

\"The failure of the main reasons is enough blood cell count and viral contamination, and bacterial cultures were positive.\" Local official told the \"rule of law over the weekend,\" reporter.Can not ignore the link

As in previous years, Ms Xu received on time on cord blood stem cells in the sample test report query notification. Input daughter ID shows the basic situation of a cord blood stem cell report, in addition to qualified word for stem cells regardless of the state, the cells you want to save enough activity are not described.

At present, since the body is stored, each stored in a cord blood bank samples were frozen to the existence of a blood bag or a small tube (the introduction of the Beijing Cord Blood Bank: each stored samples were frozen to a blood bag and three small tube). The general test approach is a small test tube samples.

If you want the storage of cord blood to do the testing, the only way to remove the whole umbilical cord blood from a liquid nitrogen tank, and then taking part for testing. This could be completely destroyed in umbilical cord blood hematopoietic stem cells. Moreover, it is generally only public library of sample to conduct random checks autologous libraries generally do not checks.

Permission to tell \"rule of law over the weekend,\" Reporter: \"umbilical cord blood can treat diabetes, cerebral palsy, spinal cord injuries and other diseases, is the baby once in a lifetime opportunity. One hundred percent use of self-preservation of umbilical cord blood is not only baby, the baby\\ s parents and siblings respectively 50% and 25% utilization, can timely access when needed. \"

Licensing introduced from April 1 this year, after adjustment, the charges and the way to Beijing since maintained: umbilical cord blood testing fees 5800 yuan annual storage fee of $ 620, the specific payment Please Choose from the following three ways a: The first payment of 1870 yuan, the remaining annual payment of 970 yuan (18,360 yuan); first payment of $ 6420, and the remaining annual payment of 620 yuan (16,960 yuan); one-time payment of 16,960 yuan.

The initial signing of the life of the deposit agreement for 18 years, newborns each year can also be awarded a 42.5 million Taikang Life Insurance.

Storage is divided into donations and self-existence of two kinds.

Permission advised reporters: \"donate to others with strict testing and demanding, by much, certainly lower than self-preservation rate.\" Since 2009, the country has 14 cases of umbilical cord blood transplantation, Beijing 6 cases. Save cord blood for their treatment of the country have four cases, three cases of Beijing. In 2009, China\\ s first autologous cord blood hematopoietic stem cell transplant success at the Beijing Children\\ s Hospital.

21 pm, would permit cited examples of the Cord Blood Bank in Beijing, the \"rule of law over the weekend,\" the reporter when the market-oriented Ministry of Ms. Lee to verify, the answer is: \"Waiting for the company leadership for approval.\"

This reporter has learned, the Beijing Municipal Health Bureau focused on the sampling of the Cord Blood Bank in the management aspects of the sampling results, the Authority\\ s officials have said: \"In the past found that the problem requires periodic rectification.

In other words, autologous storage there is no way to understand their own existence of hematopoietic stem cells in the cord blood bank in what is the state.

Once the need to use only after removing the hematopoietic stem cell in order to know whether it has been properly preserved.

Wang Qiu given expert advice in the case of stored cord blood there is no other way to learn about what state, \"To learn to understand the storage issue test reports.

Umbilical cord blood is not everything

\"For autologous cord blood storage is controversial. Think LIU Kai-yan, different experts from different angles, each have their own reason, but dispute not to a 23.\"

\"A lot of people (UCB autologous store) I was always the myth, the real use of them not the case, especially in clinical applications.\" China Medical University Shengjing hospital blood disease treatment center director Liu Zhuogang of view is very sharp. \"The hype is far greater than the real application effect some cases the exact statement should be called the umbilical cord blood input can not be called transplantation.

Health Ministry spokesman Mao Qun\\ an has said publicly, and exaggerated the role of umbilical cord blood saved since the body and a complete denial of self-preservation of cord blood are unscientific. The organizers of the Cord Blood Bank should be the principle of seeking truth from facts, objectively describes the clinical role of the self-body storage of cord blood, under the premise of fully guarantee citizens\\ right to know and the right to choose, from \"savers\" to choose cord blood storage, and resolutely oppose any form of exaggerated publicity.

Liuzhuo Gang told reporters that hematologic malignancies transplant is like two people fighting, the incoming cells and leukemia cells in the fighting, the occurrence of rejection and killed the white blood cells. This process must have a death, and finally to stay strong. \"But autologous transplantation rejection occurred, there would be no fighting, the condition is recurrent, it is not real therapeutic effect.\"

\"A lot of speculation that umbilical cord blood can bring a revolution in business, but very much worse.\" Liu Zhuogang the basis is now only one case of autologous transplantation in France.

\"For commercial interests, in autologous save, some risk factors may not be informed.\" And Liu Zhuogang hold the same view of a number of cord blood experts interviewed by the media respect.

Above too many cases of umbilical cord blood with experts, said: \"These risk factors include pollution,\" 20 years after the recovery of frozen cells, there is much use, they are skeptical.

LIU Kai-yan for cord blood storage since the body do not want to say \"can not say useless, but it does less, no results argue things, sequential induction.

In December 2009, Associate Professor, Harvard Medical School, Massachusetts General Hospital, Leukemia Research project leader in a report is given a number, in the past 20 years, the world is stored in about 900 000 copies of autologous libraries Only about 100 copies of the cord blood used in autologous transplantation.

For the development of these areas of expertise, storage and Ms Xu is not clear. They eventually are stored umbilical cord blood of children, only because the common desire to want their children to health. \"

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Zhang Yong, the 28-year-old suffering from uremia in 2001, unfortunately, young life is pain and suffering for six years, the cost of treatment has accumulated more than 300,000 yuan. The high cost of awkward for families to borrow $ 150,000. However, Zhang Yong, many have not met the benefactor deeply touched, because they flow with their blood, they love to maintain his own fragile life. The same time, she happened to have also attracted the attention of the municipal government. May 21, Zhang Yong, only 35 kg, was lying on his sick bed, said her hardships in full the kindness of relatives and friends, doctors, community.

    Suffered the disease for six years to borrow 15 million

    In 1999, Zhang Yong was admitted to the Provincial Planning school, full of dreams, she is flying out of the poor Wowo, became the model for the local villagers to educate their children. Golden Cliff Village, Yuzhong County, Bluff Township farmer father Zhang Cun Germany is an honest man, conscientious done a few years, private teachers, when the village head for a few years. Later, suffering from osteomyelitis, the ear not hear, has been staying at home, guarding the two acres of land to maintain the livelihood of the family. Apply for a college self-study exam, just two years by more than a dozen subjects. Think of October 2001, a cold for a long time Zhang Yong suddenly walk way, followed by symptoms of edema. The family feel this serious matter, \"she was sent to hospital for examination.

    Chronic nephritis, renal failure and uremia. A paper diagnosis notice an instant shattered her dreams, but also break the hope of the family.

    The Sanai Hall Hospital, Lanzhou Medical Second Hospital, Beijing, Tongji Hospital, Beijing Hospitals … six years, his family visited with her more than 10 hospitals.

    Family embarrassment 30 000 50 000 100 000 300 000 …… 6 rapid debt.

    Heavy blow distress family trouble

    At the same time, unfortunately, one after another come to the original families in precarious, Zhang Yong\\ s father is suffering from osteomyelitis, the mother, long-term medication, sister in law got hepatitis. Zhang Yong suffering the most serious disease of the family should be given priority treatment. \"Zhang Yong\\ s brother has provoked the beam. March 12, 2002, Zhang Yong Lan medical hospital two kidney transplants, once spent more than 10 million, not only emptied the family savings, owed tens of thousand of relatives. After the kidney transplant is done, Zhang Yong\\ s body has been significantly improved, and she bent to pay off debt, November 2003, anxious to her side of medicine while working, one after another subsidizing home a little bit repay with arrears. May 2005, due to insufficient amount of drugs, Zhang Yong physical deterioration, but she was embarrassed to let his family to worry about, it alone to the hospital can only adhere to six months, her slim shoulders finally could not withstand the the intrusiveness of the disease, and fell in the way of medical treatment. Uncle of Zhang Yong Liu Yinsheng carrying this poor child was admitted to the hospital. According to the hospital for medical examination results showed that the kidney transplant rejection, necrosis, to save their lives, you have to continue dialysis, re-kidney transplant. \"Every time I spend over 400 yuan dialysis, the home is really no longer able to bear a kidney transplant, I would have been unthinkable.\" Zhang Yong said in despair.

    The En maintain young life

    \"There is a good person or more, ah!\" Said Zhang Yong grateful. More than six years of illness, Zhang Yong, experiencing a field of pain, but also feel the burning love of the community dolphin. Her uncle Liu Yinsheng the past six years has been the guardian of this at any time of life may be extinguished, Liu Yinsheng on hand to retain a stack of sub-calendar on each page are recorded bits and pieces of Zhang Yong, record the name of the benefactor. Zhang Yong body flow are benefactors of blood. \"Said Liu Yinsheng. More than six years of illness, Zhang Yong from the blood bank, brought hundreds of bags of blood, above all donors\\ names written in homage to these benefactors, Liu Yinsheng follow blood transfusion bags, record their names. \"My body has been unable to repay them, I can only silently pray for them, wish them health and peace.\" Zhang Yong tears choked. Fortunately, Zhang Yong\\ s suffering has been the concerns of the community, the leadership of the municipal government has expressed great concern for her plight, motor factory workers, hospitals have to provide her with a preferential treatment policy, the dialysis costs down to 300 yuan / times. On the previous days, the authoritative doctor Yuezhong Jin Lan Medical Hospitals kidney transplant a phone call to ask about my condition. \"Zhang Yong said gratefully,\" although that kindness without saying thanks, but I hope that through your newspaper to express my gratitude to them and thank them and thank them for their love. \"

    Today, Zhang Yong, but also to the hospital to do dialysis, when the end of the reporter interviewed, the family is still running around for her dialysis costs …

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design is not exactly the same, but at the same time the oil spill, the main problem may not be out in a sealed, but taking link back to the oil of the same design.
Return hole processing of the reducer side learned from the processing plant, and indeed there is a considerable problem, the actual forming a pore size of roughly equivalent size of standard design blueprint 1/2, and the pore wall is not smooth enough, there are a lot of glitches , did not reach the roughness of the requirements of the drawings. The resulting low-speed shaft sliding bearings, circulating oil back to oil poor, the main reason for the form of oil leakage.
At this point, back to the hole at the scene trimming processing is clearly unrealistic, you need to take the easiest and fastest approach. Decision, respectively, in high and low speed shaft end of each transparent cover on the inside of the installation of oil-absorbing blankets. When the high speed shaft boring cover removed, we also found other problems.
In accordance with the original design of the seal ring installed in the high-speed shaft end, you should use spring to tighten the shaft, but after observing the spring when the installation does not hoop tight seal between the ring and the journal there is a big gap, can not play should be sealed. And manufacture of the seal ring material, and did not use the original design requirements cloth phenolic laminate.

With the continuous advance of automation, electric actuator has become an important and indispensable devices of automation. Divided into several major schools of the actuator on the market today, the first, early imitation of Japan s glorious, Germany PS; based on days two through the manual semi-automatic, Changzhou DKJ; Third, Yangzhou

Power plant auxiliary models (the SIPOS first generation product); the SIPOS technology R & D in several domestic manufacturers, the technology is currently still in beta, will soon show up; on Hayward, Wenzhou s Rickey, Wenzhou Australia Rostock such as approximate British rotork;, Omar, EMG models currently under developmentglow plug

, Domestic brands will also appear immediately. These are the general electric actuator product model structure of the distribution, and how so many products to get the relative market share to solve the needs of each small business development, so that every small business to survive in such a competitive market environment has become a problem .

    Electric actuator sales model is different from civilian product sales model, the above-mentioned product mix allocation decisions of companies to find the direction of the target customers, the low-end, two, three categories of products target customers basic valve plant-based, usually to determine the price, production capacityglow plug manufacturer

Pace of development, where representatives of local industry chain enterprises such as Changzhou Lan Ling, Lan valve small businesses, the development of fast, parts production modes of production, low price advantages quickly to seize the low-end electric valve market, four types of enterprise sales model is very different, the main direct

Run terminal customer oriented, usually the cost of sales will substantially increase, and a longer sales cycle involved in the threshold of the end customers will be high, not only to competition but also competition in the imported products and domestic enterprises, so that the formation of polarization, and capital adequacy forming a large enterprise businesses and has just entered the market

Gap, coupled with the psychological conditions of large enterprises to accept new things, is still relatively conservative, so a large number of small businesses are not very good development.

    Market should be fair, to participate in order to form a market for the specific market environment, how to better products to market worthy of the good thinking of the many small business owners, out of the products are basically mature technology products Why can not participate in normalVacuum Actuator

Competition in the market, this is a very distressing problem of many small businesses. I hope more small businesses to participate in market competition, breaking the traditional sales model, making more small businesses can develop opportunities.

The solenoid valve is used to control the automation of basic components of the fluid is a vacuum actuator; not limited to hydraulic, pneumatic. The solenoid valve used to control the direction of hydraulic flow, the mechanism of the plant by hydraulic cylinder control solenoid valve, so it will be used.

How it works: the solenoid valve closed cavity in a different location to open the through-hole, each hole to different tubing cavity intermediate valve, on both sides of the two electromagnets, which surface of the magnet coil is energized the valve body will be attracted to which side to move through the control valve body to file live or leaked oil discharge hole into the hole is always open, the hydraulic oil into the drain line, and then through the oil pressure to promote just oil the piston, the piston to drive the piston rod, piston rod drive mechanism moving. This control solenoid current control of mechanical motion.Vacuum Actuator

Category:

① direct-acting solenoid valve

Principle: the power, the electromagnetic coil to produce the electromagnetic force the closure of parts brought from the seat, the valve opens; power, the electromagnetic force disappears, spring off pieces of pressure on the seat, the valve closes.
glow plug
Features: in the vacuum actuator, negative pressure, zero pressure can work, but the path is generally not more than 25mm.

② distribution of direct-acting solenoid valve

Principle: it is a direct-acting and pilot – a combination of principle, when no differential pressure of the inlet and outlet, the power, the electromagnetic force directly to the pilot valve and main valve closure of parts in turn lift the valve opens. When the inlet and outlet reaches the start pressure, electricity, electromagnetic force pilot valve, main valve cavity pressure rise on chamber pressure drop, which use differential pressure to the main valve is pushed upwards; power failure, the pilot valve with a spring force or medium pressure to promote off, move down, so that the valve is closed.

Features: zero pressure or vacuum actuator, high pressure, also can be action, but the power is larger, the requirements must be mounted horizontally.

③ Pilot solenoid valve

Principle: power, electromagnetic force pilot hole open on the chamber pressure fell rapidly, close the pieces around the formation of low and high differential pressure, fluid pressure to promote off pieces to move up, the valve opens; power failure, the spring force pilot hole to close the inlet pressure of rapid chamber through the bypass hole off valve formed around a high pressure differential, the fluid pressure to promote the closure of parts moving down, close the valve.

Features: higher maximum fluid pressure range can be freely installed (to be customized) but must meet the fluid pressure conditions.

Should be considered in the use of some of its features, such as media characteristics, ambient temperature, operating frequency, power and other factors.

The basic characteristics of the solenoid valve

Security: do not pay attention to safety will lead to disaster!

Corrosive media: the king should use plastic solenoid valve and all stainless steel; isolation diaphragm for highly corrosive media must be selected. Cases the CD-F. Z3CF. Neutral media should use the copper alloy for the valve solenoid valve of the shell material, otherwise, the valve housing desquamation often rust, especially the action does not frequent occasions. Ammonia can not be used with the valve copper.glow plugs

Explosive environment: You must choose the appropriate proof grade products, the open-air installation or dust occasions should use waterproof, dust-proof varieties.

Solenoid valve Nominal pressure should not exceed the maximum working pressure in the tube.

Two. Applicability: NA equal to spend money to buy fee matter, also trouble!

A. Media features

1.1 The quality of gas, liquid or mixed states used different kinds of solenoid valves cases ZQDF for air, ZQDF-Y for liquid ZQDF-2 (or -3) for the steam, or easily cause a malfunction. ZDF series multi-function solenoid valve can be altogether in the air liquid. Best when the state media, install the user will not have the tuning.

1.2 Medium temperature with different specifications, otherwise the coil will burn, seals aging, seriously affect the life of life.

1.3 medium viscosity, usually 50cSt. If you exceed this value, diameter greater than 15mm to use ZDF series multi-function solenoid valve for special orders. Diameter less than 15mm high viscosity solenoid valve.

1.4 media cleanliness is not high, should be in front of the electromagnetic valve fitted with recoil filter valve, the pressure is low fashion can choose straight diaphragm solenoid valve for example, the CD-P.

1.5 medium directional flow, and is not allowed back in ZDF,-N and ZQDF-N-needed two-way flow, please make a special request.

1.6 medium temperature should be chosen within the scope of the solenoid valve allows.

(2) pipeline parameters

2.1 According to the media flow requirements and pipe connections, valve openings and models. For example, for a pipeline to the switching of two pipelines, the small diameter of the election CA5 and Z3F, medium or large diameter Please select ZDF-Z1 / 2. Another example is control the convergence of the two pipelines, please select ZDF,-Z2 / 1.glow plug manufacturer

2.2 In accordance with the flow and valve Kv value selected nominal diameter, but also optional with the pipe diameter. Please note that some manufacturers are not marked with the Kv value, often the valve hole size is smaller than the interface diameter, must not seek the lowest and makes a botch.

2.3 Working pressure

Minimum working pressure can be used in 0.04Mpa above indirect Pilot; minimum working pressure close to or less than zero must be selected direct-acting or step-by-step direct style.

(3) environmental conditions

3.1 environment, the maximum and minimum temperatures should be selected within the allowable range, if ultra-tolerance required for special orders.
3.2 The environment of high relative humidity and a drop of water and rain and other water solenoid valve, to be elected.
3.3 environment, often the vibration, bumps and shocks, and so on to be elected a special varieties, such as marine solenoid valve.
3.4 The use of a corrosive or explosive environments should give priority to the security requirements of selection of resistance to hair loss.
3.5 The environmental space restricted, please use the multi-function solenoid valve, which eliminates the need for bypass and three manual valves and easy online service.

(4) power supply conditions

4.1 Pursuant to the power supply types, were selected to AC and DC solenoid valves. Generally speaking, access to convenient AC power.
4.2 voltage specifications used as preferred AC220V.DC24V.
4.3 supply voltage fluctuation exchange is usually used +% 10% -15%, DC to allow ±% 10, should the ultra poor, to be taken by the regulator measures or make a special order requests.
4.4 should be based on the power capacity of rated current and power consumption. It should be noted that the VA value of the start of the exchange higher, lack of capacity should be preferred indirect electromagnetic valve.

(5) control accuracy

Only 5.1 ordinary solenoid valve open, and closing two locations, please choose the number of solenoid valves in the control of high precision and parameters for a smooth; Z3CF three normally open solenoid valve, with Weiqi, fully open and close the three kinds of traffic;

ZDF,-Z1 / 1 combination of multi-function solenoid valve is fully open, wide open, small open, fully open, four types of traffic.

5.2 Action Time: refers to the electrical signal is turned on or cut off the main valve action completion time, only multi-function solenoid valve of the Company s patented product can open and close time were adjusted not only to meet the control precision, but also to prevent water hammer damage.

Three. Reliability: unreliable and will damage the whole system!

A working life, this is not included in the factory pilot project, belonging to the type of pilot projects. To ensure that the quality should be regular elections manufacturers of brand-name products.

, The working system: long-term sub-working, repeated short-time working and short working three kinds. Conventional products of this company are long-term work system, that is, the coil to allow long-term power. For a long time the valve opening only a short time off, better to use the normally open solenoid valve. In the short-time working in large quantities, can be a special order to reduce power consumption.

Operating Frequency: Operating frequency requirements, the structure should be optimized direct-acting solenoid valve, the power to listen to exchange preferred.

4, operating reliability

Strictly speaking, this test has not yet formally included in our professional standards of the solenoid valve, regular manufacturers of brand-name products should be selected to ensure quality. Not a lot of movement on some occasions, but on the very high reliability requirements, such as fire, emergency protection, must not be taken lightly. Particularly important should also take two once a double insurance.

Economic: No economic waste of money, energy and even lives

One of its choice of the scale, but must be in safe, suitable and reliable on the basis of the economy.

Economy is not only the price of the product, to give priority to its features and quality of installation and maintenance and other accessories required for the costs.

More importantly, an electromagnetic valve in the automatic control system in the automatic control system and even the production line in the share of cost is minimal, if cheap and wrong to cause damage to the base is huge.

Lighter this year, the policies and regulations as a powerful driving force to promote the development of energy saving, environmental protection, safe and efficient direction of the heavy truck industry influence is also increasingly intensify. The implementation of the link will be more strict, and the entire industry will result in product technology, as well as brought about by the technology of the product cost

Will be further improved. At the same time, the regulatory environment, the upgrading of the technical threshold also help to curb the irrational consumption of heavy trucks.glow plug

2012 heavy-duty truck products will continue the development of energy-saving and lightweight direction. According to scientific tests: vehicle weight is reduced by 10%, fuel consumption can be reduced by 6% to 8%; rolling resistance 10% reduction in fuel efficiency can be increased by 3%; if the axles, transmissions and other devices, transmission efficiency is increased by 10%, fuel efficiency

Can be increased to 7%. Therefore, lightweight heavy truck industry, energy conservation the most practical and most effective technological measures. The lightweight is a systematic project, which involves a vehicle, engine, suspension and other fields, even including the application of new materials and new technologies. Auto body about the total weight of the car

30%, with no load about 70% of fuel consumption used in the body weight.

The lightweight design not only in order to save material, reduce weight, the more important purpose is to reduce energy consumption, reduce emissions and improve operational efficiency and traffic safety. High strength alloy frame, rubber suspension, aluminum transmission and other new technologies, new materials and new processes to achieve the light of the vehicle

Quantified. Automatic transmission, aluminum alloy shell transmission, variable cross-section less leaf spring structure of the leaf spring suspension, rubber suspension, air suspension, composite materials, high strength steel frame and other technical use of rapid development.

According to related statistics: heavy-duty trucks, light weight mainly reflected in the use of high-strength steels with high strength steel plate thickness can be thinned, so as to reduce weight. Such as "the use of laser welded Tailored Blanks cab, various surface treatment, two different kinds of steel of different thickness or

Steel plates by laser welding method, the free combination of a welded steel stamping. Casting the traditional red welding structural parts, due to limitations of the materials and manufacturing processes, the various parts can only be of equal thickness, in order to ensure that the overall strength and stiffness of the parts – welding are often relatively heavy

. "

Some car prices using parabolic steel, extra-wide tires vacuum actuator tires and extra-wide tires can effectively reduce the weight of the body, lightweight effect. Such as the Joint trucks and Dongfeng heavy truck is being done to the description section. The light weight of the heavy truck heavy truck enterprises to enhance the competitiveness of products R & D side

One extra-wide tires is to achieve an effective way to heavy truck lightweight one. It is reported that in Europe and North America markets a wide cross-section single fetus (WBS) has been widely used in heavy goods vehicles. The application of a wide cross-section single tire can reduce costs, reduce quality, reduce wear and fuel consumption. In addition, reference

TPMS tire pressure situation detection and early warning device, which can effectively reduce the overload detonation failure rate. If we add on the front and rear are ventilated disc brakes, which can effectively lower the wheels due to brake situation caused by hot lead to a puncture happens. In certain areas of our country, due to the maximum permissible axisVacuum Actuator

Load limit, leaving a wide cross-section single fetus can not be widely used. But with the use of heavy trucks and trailers lightweight design, a single fetal development is an irreversible trend.

The new rubber suspension is a flexible suspension from between the steel plate suspension and air suspension, its weight than the steel plate lighter than air suspension is high, and reduce assembly time, improve efficiency, thereby reducing costs, increasing efficiency. Rubber suspension for power absorption rubber is between these two

Between its simple structure, easy to install, maintenance-free without lubrication, as well as a good and comfortable, but also greatly reduce tire wear. During use, only the elastic component damage will not affect the vehicle s exercise. Can also carry more cargo, and improve fuel economy

And transport economic benefits. Future policies and regulations on the governance of the ultra-enforcement will become increasingly strict, the overload will sustain the suspension better adapted to the requirements of technical regulations lightweight, represents the direction of the development of heavy truck suspension.

The use of composite materials on the one hand effectively reduce vehicle weight, the composite forming the other hand, the shape of the structure than the metal stamping parts can be more complex, more beautiful, more accurate size. Such as the use of aluminum alloy aluminum alloy than steel density, so in some composite materials

Can not replace parts such as sheet metal parts and castings. Body, extensive use of aluminum alloy casting of aluminum alloy instead of cold rolled steel, tank, rims, engine block, transmission and body, to ensure adequate strength, stiffness at the same time, the maximum reduction in weight.

2, the CAN bus is learned that the domestic engine manufacturers have begun to integrate all the control functions to the engine ECU. The engine ECU can control the braking, ABS, so that the entire system more simple, the communication speed has been improved. Before automatic transmission, post-processing system, ABS,

GPS navigation, fuel consumption meters, etc. have their own respective ECU (electronic control unit), they are independent of each other, and by different companies to design, build, and mutual communication between the ECU is more difficult. But now, through the CAN bus can achieve its full functionality.glow plug manufacturer

3, the use of the AMT, according to the author s good friend and heavy truck technology expert, Mr. Qi Bing Description: "At present, China s AMT (Automated Mechanical Transmission, electronically controlled automatic mechanical transmission, the AMT) system from the cognitive to the part of the understanding to the present cooperation put the development of small quantities

Also more than a decade, whether for reference or self-type of research, the real production and to achieve the current road is not much.

Mr. Qi Bing, the expansion of the AMT, you can also be said that some misunderstanding exists! R & D or production process. Myth one: enterprise systems engineering has been weakened since AMT is based on the electronically controlled vacuum actuator on the basis of the manual mechanical transmission clutch and change

The process of the file, then the associated engine control, clutch control and shift vacuum actuator control system must be associated with. China s current development of commercial vehicle electronic control slower car prices, and some understanding of gearbox AMT confined to fully adapt to the user, rather than

Need some of the adaptive system, which regardless of the development or use of planted very wrong perception. Doing anything in their concept inside the manual of the car manufacturing, and why there are various problems become the same type of AMT, but also for the understanding of such problems be attributed solely to the control of the AMT

The software is not perfect.

The premise of the necessary conditions for vehicles that can match the AMT normal driving, domestic car prices is not very in depth, for example, the engine calibration is perfect, the clutch pressing force is normal, and thermal deformation of the clutch disc and other aspects of the AMT system did not affect relevant research and

Research; but totally dependent on the fault-tolerant rate of the AMT system, completely avoid the perfection of itself should be car prices on the related systems. For electronically controlled pneumatic-based vehicle matching the AMT system, car prices did not take into account extreme cases, pressure stability problems may be caused by the AMT system, which is currently the amount of

Production of electronically controlled pneumatic AMT system exists in the passive problem a major factor, but car prices, however, classified as the AMT system can not fault-tolerant.

The chai further pointed out: For the fixed axis transmission of small vehicles, basic box without pre-drop files and after Vice-box type, collected electronically controlled pneumatic AMT system, the clutch gas and vacuum used in the implementation of gas relative to requirements are not high; with pre-inserted sub-file and after Vice

Control several of the cylinder more than the box in terms of multi-gear transmission, with a position sensor system, if the displacement is not in place then because the pressure instability caused by the AMT system is naturally a delay or even stop working, and this when the performance of the vehicle in terms of most likely parking need

From a new start.

4, the the retarder truck overloading is very common, most of the heavy-duty trucks is still simply the air brake system for a larger tonnage of ore trucks, overloaded logistics vehicles, engine exhaust brake limited effect, overloading of vehicles due to brake failure cited

Issued a car accident. With the heavy truck market to large tonnage, high-powered, heavy and specialized development and GB7258 operation of motor vehicles safety technology conditions "on more than 12 tons of truck and dangerous goods transport vehicles will be forced to install retarder or other auxiliary braking device "amendments, re-

The card is equipped with a hydraulic retarder is a trend, the retarder will become the standard configuration of the truck. At present, Europe and the United States and other developed automotive market, heavy truck ESP (electronic stability program), ACC (adaptive cruise control), LGS (lane departure warning system), TPMS (tire pressure monitoring system) extensively in

And bulk loading. Automotive Brake intelligent auxiliary system EBS, the electronic control 10 bar or 12 bar with ABS, ASR dual-circuit brake system and active rollover stability of the CDC and the high-load roll stability control system.

5 dual-clutch transmission, dual clutch transmission (Dual Clutch Transmission) the DCT uses two clutch with the shift, to reduce the shift time, to improve the smooth shift. The dual clutch transmission is different from the automatic transmission system, which is based on the manual transmission instead of self-

Dynamic transmission, in addition to comfort, flexibility and automatic transmission with manual transmission, but also to provide uninterrupted power output. Traditional manual transmission with a clutch, shift, the driver depresses the clutch pedal, gear made of different gear meshing action, and the driving force

Shift occurred during interrupted, the output performance for intermittent. In recent years, a large number of mature technology, so that a heavy truck in the economic, security and other aspects have been greatly improved, want to be able to see more new technology so that drivers of heavy trucks easier.

In 2010, Japan s Mitsubishi on a heavy truck, the introduction of a dual clutch transmission Duonic, which is the world s heavy trucks, the first dual-clutch transmission. JAC DCT 6-speed dual-clutch gearbox will be available in March 2013 officially listed.

6, natural gas LNG power data show: 2030, natural gas will surpass oil to become the world s largest energy in the 21st century will be the century of natural gas. The end of 2009, the world s proven gas 187 trillion cubic; Vision reserves of 600 trillion cubic. At present, China s conventional natural gas

Reserves of about 55 trillion cubic meters, of which the land reserves of approximately 38 trillion cubic meters. Unconventional natural gas reserves are estimated at 200-380 trillion cubic meters. Overall, China s abundant natural gas reserves, the development of natural gas vehicles in the gas source is fully guaranteed. Natural gas in the future will be more than Shiyou Cheng

Energy-driven, with very broad prospects.

"12th Five-Year" period, China will be the formation of a national gas pipeline network is expected to cover more than 300 prefecture-level and above cities, conveying natural gas from the rich reserves of Xinjiang, Sichuan and Shanxi to the eastern coastal economically developed areas. In the next 12 years, will build 300,000 kilometers of gas pipelines, Toru

The final solution to the problem of transport bottlenecks, urban demand for natural gas will enter the stage of the outbreak of growth.

From the energy saving effect of the obvious advantages of natural gas heavy truck, mining and use of the process are non-polluting. Natural gas heavy-duty truck operating costs than ordinary heavy truck of 1.75 yuan per cubic meter of natural gas operation mileage of 300,000 km per year, that use of natural gas than diesel

Less to save more than 200,000 yuan, operating costs will be greatly reduced. In recent years, the national shortage of diesel prices heavy truck operating costs suddenly, it also further highlights the technology is more mature new energy heavy truck demand. At present, natural gas, heavy truck in the momentum. Shaanxi Auto, liberation, East

Wind, heavy truck, Valin, SAIC Iveco Hongyan gas tractor, dump truck, cement mixer, and other models have been offering natural gas heavy truck covers 210-380 horsepower tractors, trucks, dump trucks, concrete mixing vehicles, off-highway mining vehicles, driving range from the 200-300 km

To more than 1000 km. In addition to expanding the domestic market share at the same time this year, China National Heavy Duty Truck, Shaanxi Heavy Duty Truck, SAIC Iveco Hongyan heavy truck companies have achieved a large number of exports of natural gas heavy truck.

In the absence of a clear policy to support the development of domestic natural gas heavy truck has to rely on own businesses and markets to promote the line. National natural gas vehicles should be incorporated into the scope of the new energy vehicles, to increase efforts to support the industrial chain, to provide support for technology development, reduce procurement costs, while in the purchase

The car link given user subsidies, to encourage the development of natural gas heavy-duty truck.

Due to the advantages of LNG vehicle driving range, LNG heavy-duty truck has also been recognized by more and more users are gradually changing the views of the natural gas heavy-duty truck, and quickly accepted as a new thing, found that its economy is prominent, security and reliability good range of absolute advantage. Because natural gas heavy truck industry solid

Some focus on the characteristics of the high degree of expected future period of time, natural gas heavy-duty truck sales will continue to transport large customers of the logistics industry, but retail sales will increase more and more. The primary task of the natural gas heavy truck enterprises in the future is to further reduce gas consumption, strengthen the construction of one and two dealer network

With the service provider s maintenance capacity. Only in this way, China s natural gas heavy truck industry will it be possible to grow and develop the vast natural gas heavy truck market to the future.

 vehicle device complexity of electronic systems has increased steadily, mid-level cars are widely used in every car manufacturer to accelerate the rapid growth of the automotive IC.

        In the past, used in automotive applications the light-emitting diode (LED) lighting is only a vehicle concept, to date, the LED has been widely used in many cars and trucks dashboard backlighting, interior lighting and brake lights. In addition, the luxury car manufacturers have gradually enhance the application of solid-state LED lighting technology, and through these lighter, smaller, more reliable components to provide vehicle exterior lighting to enhance their vehicles performance and beauty.

        In addition, the LED can provide lower cost and longer life, to provide significantly better than incandescent lighting, interior lighting advantages, such as high-pressure gas discharge lamps (HID) and halogen light bulbs for the headlights.

        Want to use a car battery-powered LED requires a DC-DC (DC / DC) converter to accurately adjust the LED current to ensure consistent lighting intensity and color saturation, while protecting the LED.

        In addition, according to the different uses of the LED should be for specific power requirements to optimize the DC / DC regulator, such as headlights, rear lights, signal lights, the internal situation or reading lamp one of the challenges is to be may be lower than equal to or higher than the load voltage of the battery voltage drive to one or several strings of LED, the other consideration, is based on a large dimming ratio effectively dimming LEDs, but also remain in the low and high brightness level of color characteristics.