valve is indispensable to pipeline system components, its quality directly affect the production and safety, the problem is that they are just is surely damage to parts, because the valve sealing surface due to the wear of valve, wear and corrosion medium flow, magazines such as extrusion reason will form in the pit damage, scratches, spots, etc. According to statistics, 80% of the Industrial Valves leakage is caused due to the damage of the sealing surface of first. leakage will cause the following consequences:

1. Transmission medium erosion

2. Environmental pollution

3. Fault, such as regulating valve leakage will cause the composition of chemical products is allowed to

4. Major accident disaster, such as relief valve leakage may lead to explosion and leakage of poisonous gas, such as

so the Industrial Valves may be small, but the dosage of and its role can not be ignored, so how to solve this problem? Below to introduce the electric control Industrial Valves leakage solution.

1) Increase the sealing grease method

the unused sealing grease valve, can consider to increase the sealing grease to improve stem seal performance.

2) Increase the packing method

in order to improve the packing sealing performance of the valve stem, can adopt the method of adding filler. Usually adopt double, multi-layer mixed packing form, simply increasing the number, such as between 3 to 5 pieces, the effect is not obvious.

3) Replacement of graphite packing method

a lot of use of ptfe packing, because of its working temperature in - When the temperature within the range of 20 ~ + 200 ℃, lower limit, change is bigger, its sealing is markedly reduced, aging fast, short service life. Flexible graphite packing can overcome these shortcomings and long service life. Therefore some factory all change the ptfe packing to graphite packing, even new to buy back the regulator will also be one of the four fluorine used after packing into graphite packing. But using graphite packing return difference is big, the early some still produce the crawling phenomenon, which must be considered.

4) Change flow direction, buy P2 method on the stem end

when the delta p is larger, P1 and large seal P1 obviously difficult than seal P2. Can take change flow direction method, therefore, will be P1 to P2 on the stem end on the stem end, the high pressure, differential pressure valve is more effective. Usually should be considered as bellows valve seal P2.

5) The lens gasket sealing method

for the lid of the upper and lower sealing, sealing seat and the upper and lower body. If the plane sealing, under high temperature and high pressure, the sealing is poor, cause leakage, can use lens gasket seal, can get satisfactory results.

6) Replace the sealing gasket

so far, most of the sealing gasket is still use the asbestos board, at high temperatures, sealed performance is poor, life is short, cause leaks. Encounter this kind of circumstance, can convert wound gaskets, & other; O” Ring, etc. , and now many plants have been used.

If you have plenty of time, you can learn how to take care of os gate valve. Also, invest in the right resilient valve gate valve.
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