China Two Shaft Replaceable Seat Lug Butterfly Valve DN400 PN10 Manufacturers, Exporters
Product Description
1. Replaceable Seat
Extends valve life and reduces maintenance costs. You can replace only the seat (not the entire valve) when worn or damaged, saving time and money.
2. Two-Stem Design
Provides better torque distribution and disc alignment. Reduces wear on internal components and enhances valve durability, especially in large-diameter valves.
3. CF8M (316 Stainless Steel) Disc
Excellent corrosion resistance. Suitable for aggressive fluids, seawater, and chemicals—ensures long service life in harsh environments.
4. Lug Type Body
Enables end-of-line service and installation without needing a downstream flange. Ideal for systems requiring isolation or frequent maintenance; simplifies installation and replacement.
5. Bidirectional Sealing Advantage
Seals effectively in both flow directions. Increases versatility and safety in piping system design.
6. Compact & Lightweight
Easier to install and requires less space than gate or globe valves. Reduces load on pipelines and support structures.
| Size & Pressure Rating & Standard | |
|---|---|
| Size | DN40-DN1200 |
| 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 lined with PTFE |
| Stem/Shaft | SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel |
| Seat | EPDM |
| Bushing | PTFE, Bronze |
| O Ring | NBR, EPDM, FKM |
| Actuator | Hand Lever, Gear Box, Electric Actuator, Pneumatic Actuator |
A replaceable seat allows maintenance teams to change only the worn rubber or polymer seat instead of discarding the entire valve, significantly reducing operating costs and system downtime.
The two-stem configuration provides superior torque distribution and precise disc alignment, minimizing friction and wear on internal parts to enhance durability under operating pressures.
CF8M disc material contains molybdenum, offering excellent resistance against pitting, crevice corrosion, aggressive chemicals, and seawater environments.
Yes, the threaded lug design allows the valve to be securely bolted to the flange from either side, enabling end-of-line service and line maintenance without a downstream flange.
The valve features an ISO 5211 upper flange standard, allowing easy integration with manual hand levers, gear boxes, pneumatic actuators, or electric actuators.
Yes, it features bidirectional sealing capability, ensuring zero-leakage performance regardless of the fluid direction, maximizing flexibility and installation safety.
