I would like to know the cause of the leakage of the diaphragm head of the control valve and the sol

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

If the diaphragm is not broken, the bolts around the membrane head are not tightened, and the air leakage will occur, and each bolt can be tightened, I hope it will help you.

Purchase the sealing gasket of the membrane head from the original manufacturer;

Replace the membrane head bolts with the screw rod bolts one by one, and after the replacement, loosen the bolts one by one until the spring reaches the position of no compression. This prevents the spring from popping out and hurting people.

After replacing the gasket, use a long bolt to compress. Then replace the original bolts.

Diaphragm leakage, first of all, you have to open the cylinder to find the leakage point, if the orange hole pure does not see the tremor only see the diaphragm is damaged, that is, in the center of the valve stem, there is a screw clamping point where there is a screw. If the diaphragm is damaged, replace the diaphragm directly, there is no other way.

If the diaphragm is aging and damaged or the torque of the membrane head is uneven when the actuator is assembled, if you want to completely solve it, you can only replace the diaphragm or disassemble and reassemble it.

Reduce the pressure of air supply, and the silver regret Zheng can be controlled at about the kilogram Fengsong can be the front height;

The basic phenomenon is similar to that of the line from the positioner to the membrane head when there is an air leak, but the leakage point cannot be found. When the gas signal is maximum, the valve action is not in place, the output of the valve positioner cannot reach the full stroke pressure of the regulating valve, and the intelligent potentiometer can hear the air pump working continuously.

When adding air to the membrane head, quickly pull out the tube and block the inlet joint of the membrane head with your hand, and if you feel that the pressure drops rapidly and the valve falls back, you can basically confirm it. (A bit of skill and experience here). Or add a valve or connect a section of hose to the pipeline, and the valve can also confirm the leakage of the membrane head after it is suddenly cut off and the valve falls back.

A manual electric valve positioner feeds air into the cylinder. For example, if the hole in the cylinder head leaks, the diaphragm inside is broken, and if the lower cover leaks, the O-ring on the push rod is broken.

The valve positioner has an input signal but the regulating valve does not operate, most of the reasons are that the electric magnet assembly is faulty or the air supply pressure is wrong, it is recommended to replace the solenoid assembly or check the air pressure.

The valve positioner has no output pressure. The reason is that the dust and impurities in the air are not filtered thoroughly, resulting in the throttle hole being blocked, or the nozzle baffle is not in the correct position, the relay is defective, etc., and the treatment method is to dredge the throttle hole with 0 2mm steel wire, replace the relay, etc.

The output pressure is slow or abnormal. In the daily production operation, the constant action of the regulating valve will lead to the damage of the membrane head of the regulating valve, air leakage, resulting in the failure that there is an input signal but the regulating valve is slow, so that the regulating valve can not achieve the effect of timely adjustment, and the treatment method is to check the membrane chamber and replace the diaphragm.

Different valves are slightly different, it is recommended to consult the manufacturer you use to consult, in order to get the most professional reply.

Go to a regular hospital, a small hospital is not clean.

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Here's the notebook, you sent it wrong.