Lever Butterfly Valve

Lever Butterfly Valve

ZFV use rubber as sealing seat material, which can assure of reliable sealing and shut down function.

Product Details

ZFV Lever butterfly valve.

ZFV use rubber as sealing seat material, which can assure of reliable sealing and shut down function. While this kind of butterfly valve has the advantage of good sealing performance, in the other hand, the disadvantage of this kind valve is easy to aging, wear, have short using life, comparing other type valve. ZFV shall provide IOM for customer in case of order, explaining issues need to be pay attention to use this kind valve.


Due to the seat sealing material rubber, which can not be used in high temperture better not higher than 100 degree C.

Working temperature is one of the most important feature to design and manufacture valve, below material and suitable using temperature for valve for your information:

1. Low Temperature Service. Temperature -29℃ ≥ T ≥ -100℃.

The main material should be austenic stainless steel,ferritic stainless steel, martensitic stainless stee.

Below material can be used to produce low temperature valves:

ASTM A351 CF8M,ASTM A351 CF3M,ASTM A351 CF8, ASTM A351 CF3,ASTM A182 F316, ASTM A182 F316L, ASTM A182 F304, ASTM A182 F304L,ASTM A352 LCA, ASTM A352 LCB, ASTM A352 LCC, ASTM A352 LC1.

2. Non-corrosive service.

The main material be carbon steel in case service is water, steam, gas, oil etc.The material grade is ASTM A216 WCB, ASTM A216 WCC, forged carbon steel ASTM A105. Using temperature range is from -29℃ to 425℃. But general using temperature of carbon steel is not hgiher than 400℃, consider safety factor.


3. High temperature service.

The main material be Cr-Mo casting high temperature steel.

ASTM A217 WC6, ASTM A217 WC9, ASTM A182 F11, ASTM A182 F22, suitable for service water, steam, gas, not suitable for oil contain sulfur.suitable temperature ASTM A217 WC6 and ASTM A182 F11 :-29℃ to 540℃; ASTM A217 WC9 and ASTM A182 F22:-29℃ to 570℃.

ASTM A217 C5, ASTM A182 F5 suitable for service water, steam, gas, and oil contain sulfur.suitable temperature ASTM A217 WC6 and ASTM A182 F11 :-29℃ to 550℃ .


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