China EPDM Replaceable Seat Ductile Iron Lug Type Butterfly Valve Body Manufacturer, Exporter
Product Description
The lug butterfly valve disc has two-way bearings, good sealing and no leakage during pressure test.
The flow curve tends to be straight. Excellent adjustment performance.
Center plate structure, small opening and closing torque.
Long service elevator. Withstand the test of thousands of openings and closing operations.
Seat test: water at 1.1 times the working pressure to ensure bubble free closure..
Functional/Operational Test: At final inspection, each valve and its actuator (flow lever/gear/pneumatic actuator) undergo a complete operational test (open/close). The test is performed without pressure and at ambient temperature. It ensures proper operation of the valve/actuator assembly, including accessories such as solenoid valves, limit switches, air filter regulators, and more.
| Size & Pressure Rating & Standard | |
|---|---|
| Size | DN40-DN1600 |
| Pressure Rating | PN10, PN16, CL150, JIS 5K, JIS 10K |
| Face to Face STD | API609, BS5155, DIN3202, ISO5752 |
| Connection STD | PN6, PN10, PN16, PN25, 150LB, JIS5K, 10K, 16K, GOST33259 |
| Upper Flange STD | ISO 5211 |
| Material | |
| Body | Cast Iron(GG25), Ductile Iron(GGG40/50), Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L) , Duplex Stainless Steel(2507/1.4529), Bronze, Aluminium Alloy. |
| Disc | DI+Ni, Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L) , Duplex Stainless Steel(2507/1.4529), Bronze, DI/WCB/SS coated with Epoxy Painting/Nylon/EPDM/NBR/PTFE/PFA |
| Stem/Shaft | SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel |
| Seat | NBR, EPDM/REPDM, PTFE/RPTFE, Viton, Neoprene, Hypalon, Silicon, PFA |
| Bushing | PTFE, Bronze |
| O Ring | NBR, EPDM, FKM |
| Actuator | Hand Lever, Gear Box, Electric Actuator, Pneumatic Actuator |
The valves are manufactured in accordance with the EN 593 general purpose standard, with face-to-face dimensions conforming to API609, BS5155, DIN3202, and ISO5752.
Yes, the valve is equipped with a soft replaceable seat featuring a tongue and groove design that locks the seat securely in place, providing full dead-end capability.
The valve undergoes two-way bearing pressure testing without leakage, as well as a specialized water seat test at 1.1 times the working pressure to guarantee bubble-free closure.
The upper flange adheres to the ISO 5211 mounting standard, allowing smooth configuration with hand levers, gearboxes, pneumatic actuators, or electric actuators.
They are widely applied for flow, pressure, and temperature management in petroleum, chemical processing, electric power, environmental protection, metallurgy, water treatment, fire protection, and thermal power plant cooling systems.
