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U Type Rubber Seat Butterfly Valve - China Suppliers & Factory for Gear Operated Waterworks DN50-DN1200
Features
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Provides a bubble‑tight closure at the full pressure rating.
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The seat and disc are the only valve components that come into contact with the medium.
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Specially developed for use with abrasive or erosive fluids.
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Incorporates a cartridge‑style seat that can be replaced without special tools. The seat comprises a reinforced backing ring with the elastomer vulcanized to it. Once the valve is secured between pipe flanges, this stable seat resists any deformation or displacement. The cartridge design also prevents problems such as elastomer stretching or bending in front of the disc during cycling.
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Supports a broad spectrum of material combinations.
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Comes with a standardized actuator flange to make operator changes straightforward.
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Side thrust loads are managed by a top bushing.
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Hub sealing is ensured by preloaded contact between the flattened seat surface and the disc hub, providing a reliable seal at any disc position.
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The one‑piece, wafer‑thin disc and stem assembly offers extremely low flow resistance.
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The seat is field‑replaceable, isolating the body and stem from the flow path.
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Integral molded O‑rings serve as flange seals, eliminating the requirement for separate gaskets.
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Universal mounting flange: The integrally cast actuator flange meets ISO 5211 dimensional requirements, making it compatible with a full range of operators—including 10‑position handle kits, gear actuators, electric actuators, and pneumatic actuators.
Materials Of Main Parts
| ITEM | PART NAME | MATERIAL |
|---|---|---|
| 1 | Body Material | Cast iron / Ductile iron / WCB 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 | Gear Box | Ductile iron / Aluminum |
| 6 | Bushing | PTFE / Bronze |
| 7 | O Ring | NBR / EPDM / VITON |
Valve Standard
| Category | Details |
|---|---|
| Type | U Type |
| Face to Face | API609, EN593, EN558-1 Series 20, DIN3202 K1, ISO5752 |
| Flange Drilling | EN1092 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 makes the U Type Butterfly Valve suitable for abrasive or erosive fluids?
The valve is specially engineered for abrasive and erosive media. Only the seat and disc come into direct contact with the fluid, minimizing wear on other components. The cartridge-style seat features a reinforced backing ring with vulcanized elastomer, providing exceptional resistance to deformation and displacement even under demanding flow conditions.
Q
Can the seat be replaced in the field without special tools?
Yes. The valve incorporates a cartridge-style seat design that is fully field-replaceable without requiring any special tools. This significantly reduces maintenance downtime. The seat isolates the body and stem from the flow path, ensuring that only the seat is exposed to the medium during replacement.
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Which international standards does this butterfly valve comply with?
The U Type Butterfly Valve conforms to multiple international standards. Face-to-face dimensions comply with API609, EN593, EN558-1 Series 20, DIN3202 K1, and ISO5752. Flange drilling meets EN1092 PN10/PN16, JIS 5K/10K, ANSI150, AS Table D/E, and SANS. The actuator mounting flange meets ISO 5211 requirements.
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What actuator types are compatible with this valve?
The integrally cast actuator flange meets ISO 5211 dimensional requirements, making it universally compatible with a wide range of operators. These include 10-position handle kits, gear actuators, electric actuators, and pneumatic actuators, allowing flexible automation and manual operation options.
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What seat and disc materials are available for different media applications?
A broad range of material combinations is available to suit various media. Seat materials include EPDM, NBR, Buna, Viton, PTFE, Hypalon, Silicone, and Neoprene. Disc materials include DI+Ni, CF8, CF8M, CF3M, Duplex Stainless Steel, Al-Bronze, DI+Nylon, DI+PTFE, and DI Epoxy, enabling selection for water, chemicals, food-grade, and high-temperature applications.
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What industries and applications is the U Type Butterfly Valve designed for?
This valve is designed for a wide range of industries and applications, including HVAC systems, water supply and sewage treatment, food and beverage processing, chemical and petrochemical processing, power generation and utilities, paper and pulp manufacturing, and marine applications. Its pressure ratings of PN10, PN16, 150PSI, 200PSI, and Class 150 cover the majority of standard industrial requirements.