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One Piece Stem No Pin Lug Butterfly Valve - China Suppliers and Factory for DN25-DN1200 Valves
Features
Guarantees a bubble‑tight seal at the valve's full pressure rating.
Only two internal parts—the seat and the disc—make contact with the service medium.
Tailored for demanding conditions involving abrasive or erosive fluids.
Incorporates a cartridge‑style seat that can be replaced without removing the body from the line.
The seat is constructed from a reinforced backing ring with the elastomer bonded to it by vulcanization. When the valve is sandwiched between pipeline flanges, the seat remains securely in place, resisting any deformation or movement. This cartridge design also eliminates problems such as elastomer stretching or bending ahead of the moving disc during operation.
The seat is constructed from a reinforced backing ring with the elastomer bonded to it by vulcanization. When the valve is sandwiched between pipeline flanges, the seat remains securely in place, resisting any deformation or movement. This cartridge design also eliminates problems such as elastomer stretching or bending ahead of the moving disc during operation.
Supports a broad selection of material pairings.
Fitted with a standardized actuator interface to facilitate straightforward swapping of operators.
A top bushing manages side thrust forces.
Sealing at the hub is accomplished through preloaded contact between the machined flat seat surface and the disc hub area, delivering a dependable seal regardless of disc position.
The one‑piece, wafer‑thin disc and stem assembly creates minimal obstruction to flow.
The seat is replaceable in the field, effectively isolating the body and stem from the fluid path.
Built‑in molded O‑rings serve as flange seals, eliminating the requirement for additional gaskets.
Universal mounting flange:
The integrally cast actuator flange meets ISO 5211 dimensional specifications, making it compatible with a full range of operators—including 10‑position handle kits, gear drives, electric actuators, and pneumatic actuators.
The integrally cast actuator flange meets ISO 5211 dimensional specifications, making it compatible with a full range of operators—including 10‑position handle kits, gear drives, electric actuators, and pneumatic actuators.
Materials Of Main Parts
| ITEM | PART NAME | MATERIAL |
|---|---|---|
| 1 | Body Material | Cast iron / Ductile iron / CF8 / CF8M / WCB / Duplex / Al-Bronze / Aluminium Etc. |
| 2 | Seat Material | EPDM / NBR / Buna / Viton / PTFE / Hypalon / Silicone / Neoprene Etc. |
| 3 | Stem Material | 45# / SS420 / SS410 / SS416 / SS316 / SS304 / Duplex Stainless Steel Etc. |
| 4 | Disc Material | DI+Ni, CF8, CF8M, CF3M, Duplex SS, Al-Bronze, DI+Nylon, DI+PTFE, DI Epoxy Etc. |
| 5 | Hand Lever | Malleable Iron / Stamping Steel / Aluminum / Stainless Steel |
| 6 | Bushing | PTFE / Bronze |
| 7 | O Ring | NBR / EPDM / VITON |
Valve Standard
| Category | Details |
|---|---|
| Type | Lugged |
| Face to Face | API609, EN593, EN558-1 Series 20, DIN3202 K1, ISO5752 |
| Flange Drilling | EN1092 PN6 / PN10 / PN16 / JIS 5K / 10K / ANSI150 / AS Table D/E / SANS |
| Mounting Flange | ISO5211 |
| Pressure Rating | PN10 / PN16 / 150PSI / 200PSI / Class 150 |
| Application | HVAC, Water Supply & Sewage, Food & Beverage, Chemical/Petrochemical Processing, Power and Utilities, Paper and Pulp, Marine |
Dimensions (mm)
More Details
Frequently Asked Questions (FAQ)
Q
What is the sealing performance of this lug butterfly valve?
This valve guarantees a bubble‑tight seal at the valve's full pressure rating. The cartridge‑style seat, constructed from a reinforced backing ring with vulcanized elastomer, ensures a secure, deformation‑free seal when sandwiched between pipeline flanges.
Q
Can the seat be replaced without removing the valve from the pipeline?
Yes. The valve incorporates a cartridge‑style seat that is fully field‑replaceable without requiring the body to be removed from the line. This significantly reduces maintenance downtime and operational costs.
Q
What pressure ratings and standards does this valve comply with?
The valve is rated for PN10, PN16, 150 PSI, 200 PSI, and Class 150. It conforms to international standards including API609, EN593, EN558‑1 Series 20, DIN3202 K1, and ISO5752 for face-to-face dimensions, and ISO5211 for the mounting flange.
Q
What actuator types are compatible with this valve?
The integrally cast actuator flange meets ISO 5211 dimensional specifications, making it fully compatible with a wide range of operators including 10‑position handle kits, gear drives, electric actuators, and pneumatic actuators.
Q
What seat and body materials are available for different media?
A broad selection of material pairings is supported. Body materials include Cast Iron, Ductile Iron, CF8, CF8M, WCB, Duplex, and Al-Bronze. Seat materials include EPDM, NBR, Viton, PTFE, Hypalon, Silicone, and Neoprene, allowing the valve to handle a wide variety of fluids including abrasive and erosive media.
Q
What industries and applications is this valve suitable for?
This lug butterfly valve is suitable for a wide range of industries including HVAC, Water Supply & Sewage, Food & Beverage, Chemical/Petrochemical Processing, Power and Utilities, Paper and Pulp, and Marine applications.