ZFV stainless steel triple offset butterfly valve, above valve is 12in class 150 stainless steel butterfly valve, double flange end with worm gear operator. Main part material list as below :
Body : ASTM A351 CF8
Disc ：ASTM A351 CF8
Shaft : ASTM A182 F304
Gland: ASTM A351 CF8
Yoke : ASTM A351 CF8
Bolts Stainless steel 304
Not all factories use stainless steel for yoke material. Because the yoke of butterfly valve will not contact to service flow directly, so some factories use carbon steel such as A216 WCB as yoke material, the yoke bolts are also carbon steel.
ZFV provide different stainless steel valve for custom's different requirement. Normal stainless steel available include : A351 CF8, A351 CF8M, A351 CF3, A351 CF3M, which is suitable for general acid service. ZFV also provide other stainless steel such duplex stainless steel like A890 4A, A351 CN7M, A351 CF8C, A351 CK3MCuN and so on.
ZFV provide valve with gear operator. The material of gear box availabe include ductile iro, carbon steel or stainless steel.
Zhejiang Zhengfeng Valve