Resilient Seated Butterfly Valve Wafer Type
Resilient Seated Butterfly Valve — also referred to as "concentric", "rubber lined" or "rubber seated" butterfly valve — features a rubber (resilient) seat between the external diameter of the disc and the internal wall of the valve body.
A quarter-turn valve that rotates 90° to open or close fluid flow. The circular disc (the "butterfly") sits at the center of the body and acts as the closing mechanism, connected to an actuator or handle through the shaft.
When the disc does not rotate to a full quarter-turn, the valve is partially open — enabling flow regulation at various opening angles.
Wafer Butterfly Valve — the most compact design with short face-to-face dimension. Fits between two flanges, secured by studs passing from one flange through the other. The valve is held in place and sealed with gaskets under stud tension.
Maintenance-free
Cost-effective
Bi-directional sealing
Compact construction — low weight, minimal installation space
Centric shaft, 100% bi-directional bubble-tight sealing, any installation direction
ISO 5211 top flange for easy automation and actuator retrofitting
Low operating torque — economical actuator selection
PTFE-lined bearings — maintenance-free, no lubrication required
Inserted liner — easy to replace, no body corrosion, suitable for end-of-line use
DN32–DN600
| Design & manufacture | API 609 / EN 593 |
| Face to face | ISO 5752 / EN 558-1 Series 20 |
| Flange end | ISO 1092 PN6/10/16/25 | ANSI B16.1 / B16.5 Class 125/150 |
| Pressure rating | PN6/10/16/25 | ANSI Class 125/150 |
| Test & inspection | API 598 / EN 12266 / ISO 5208 |
| Actuator mounting | ISO 5211 |
| Body | Ductile iron, carbon steel, stainless steel, duplex stainless steel, Monel, Alu-bronze |
| Disc | Ductile iron (nickel or nylon coated), Alu-bronze, stainless steel, duplex, Monel, Hastelloy |
| Liner | EPDM / NBR / FPM / PTFE / Hypalon |
| Stem | Stainless steel / Monel / Duplex |
| Bushing | PTFE |
| Bolts | Stainless steel |
Water and waste effluent treatment plants
Paper, textiles and sugar industry
Construction industry and drilling production
Heating, air conditioning and cooling water circulation
Pneumatic conveyors and vacuum applications
Compressed air, gas and desulphurization plants
Brewing, distilling and chemical process industry
Transportation and dry bulk handling
Power industry
please refer to our catalogue of butterfly valves for details or contact our sales team directly.
