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Five methods to deal with the leakage of electric control valve

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Industry News

Release Time：2019-12-09

Method 1: increase the sealing grease method This method is not yet used for sealing grease valve body, you can consider increasing the sealing grease to improve the sealing performance of the valve stem. Usually daily maintenance of electric control valve, increase the supplementary sealing grease is also one of the necessary maintenance procedures. Method 2: Change the flow direction and place P2 at the valve rod end method. When △P is larger and P1 is larger, sealing P1 is obviously more difficult than sealing P2. Therefore, the method of changing the flow direction can be adopted to change P1 to P2 at the end of the valve rod, which is more effective for valves with high pressure and large pressure difference. Such as bellows valve should usually consider sealing P2

Method one: increase the sealing grease method
This method is not yet used for sealing grease valve body, you can consider increasing the sealing grease to improve the sealing performance of the valve stem. Usually daily maintenance of electric control valve, increase the supplementary sealing grease is also one of the necessary maintenance procedures.
 
Method 2: Change the flow direction and place P2 at the valve rod end method
When ΔP is larger and P1 is larger, sealing P1 is obviously more difficult than sealing P2. Therefore, the method of changing the flow direction can be adopted to change P1 to P2 at the end of the valve rod, which is more effective for valves with high pressure and large pressure difference. Such as bellows valve should usually be considered to seal P2.
 
Method three: using lens pad sealing method
For the sealing of the upper and lower covers, the sealing of the valve seat and the upper and lower valve bodies. If it is a flat seal, under high temperature and high pressure, the sealing is poor, causing leakage, you can switch to the electric control valve lens gasket seal, can get satisfactory results.
 
Method four: add filler method
Is usually used in the form of double or multi-layer mixed packing simply increase the number of gaskets, such as 3 to 5 pieces, to improve the sealing performance of the valve stem, but the electric control valve leak proof effect is not very obvious.
 
Method five: replace the graphite packing method
When the working temperature changes in the upper and lower limits, the sealing performance of the electric control valve is significantly reduced, and the aging is fast and the life is short. The recommend use of flexible graphite packing here can overcome unbearable difficulties and have a long service life, thereby improving the reliability of the seal.

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