Body material catagory of triple offset butterfly valve include two type : forged material and casted material , forged material have better machenical performance, below photos are forged material A105 bi-directional triple offset butterfly valve. the valve have floating renewable seat ring design, body stellite overlay for wear resistance purpose, butt welded end type . The valve can be tight sealing for flow both in inlet direction and outlet direction.
Beside butt welded end type valve, ZFV can also provide flange end type, wafer end type and LUG end type valve.
The floating seat design of bi-directional butterfly valve is different from the ordinary one-way sealing butterfly valve. The floating seat design is separate from the valve body, and independently processed and then embedded in the valve body. Positiona of floating seat is in the four open loops and fixed by fasteners. The valve body seat is embedded with a high temperature resistant O-ring, which can be self-adjusted according to the different directions of the medium, and moved forward and backward to achieve the sealing effect. which provide higher performance than ordinary one-way sealing butterfly valve.
Available material of ZFV API LUG style triple butterfly valve: ASTM A216 WCB, ASTM A351 CF8, ASTM A351 CF8M, ASTM A890 4A, ASTM A217 WC6, ASTM A217 C12, ASTM A352 LCB, etc. Operation type of ZFV API LUG style triple butterfly valve: Manual handle operator, worm gear with handwheel operator, electric actuator operator, pneumatic actuator operator, etc.
Zhejiang Zhengfeng Valve .