Cast iron wafer butterfly valve is concentric disc design.

Size: DN50 to DN1200(2" to 48"),
Pressure rating: PN10/16(ANSI Class 150LBS).
Valve manufactured to API609 and EN593.

We have replaceable seat and unreplace seat type for different customer.
For replaceable seat type, the seat can be easily moved from the body, and no need to damage any components at all.
For unreplaceable seat type, the rubber seat is fussioned on the body directly and no possible to move at all, so this type will have better torque and suitable for dead end service.

Our concentric disc butterfly valve can have different connecting type: Wafer (semi lug), lug and double flange ends.
For the connecting of disc and shaft, we use special key instead of pin to drive the disc, so the shaft will be free from the medium and the valves will be more safety for some corrosion medium. Valve can be operated by level, gear box with manual handwheel, electrical or pneumatic actuators for automation purpose.

Main materials:
Body: cast iron GG25 / ASTM A126 CLASS B, ductile iron GGG40, casting steel WCB.
Disc material: Ductile iron GGG40 NP, CF8, CF8M, 1.4410, 1.4529. Hasstelloy-C, aluminum bronze....
Seat: EPDM, NBR, Viton(FPM)....

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