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U Type Rubber Seat Butterfly Valve - China Suppliers and Factory Direct, DN50-DN1200 Sizes Available
⚙ 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 does "bubble-tight closure" mean for a U Type butterfly valve?
Bubble-tight closure means the valve achieves zero leakage at its full rated pressure. When fully closed, the elastomer seat forms a perfect seal against the disc, preventing even the smallest amount of fluid or gas from passing through.
Q
Can the seat of this butterfly valve be replaced in the field without special tools?
Yes. The valve features a cartridge-style seat design that is fully field-replaceable. The seat can be removed and installed without any special tools, minimizing downtime and simplifying maintenance operations.
Q
What seat materials are available, and how do I choose the right one?
Available seat materials include EPDM, NBR, Buna, Viton, PTFE, Hypalon, Silicone, and Neoprene. The selection depends on your process fluid, temperature, and chemical compatibility requirements. For example, EPDM is ideal for water and steam, Viton suits aggressive chemicals, and PTFE is preferred for highly corrosive media.
Q
What actuator types are compatible with this U Type butterfly valve?
The valve is equipped with an integrally cast actuator flange that complies with ISO 5211 dimensional standards. This makes it compatible with a wide range of operators, including 10-position handle kits, gear actuators, electric actuators, and pneumatic actuators.
Q
What are the pressure ratings and applicable standards for this valve?
This butterfly valve supports pressure ratings of PN10, PN16, 150PSI, 200PSI, and Class 150. It conforms to major international standards including API609, EN593, EN558-1 Series 20, DIN3202 K1, and ISO5752 for face-to-face dimensions, and EN1092, JIS, ANSI, and AS standards for flange drilling.
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In which industries and applications is this U Type butterfly valve suitable?
This valve is designed for a broad range of applications, including HVAC systems, water supply and sewage treatment, food and beverage processing, chemical and petrochemical processing, power generation and utilities, paper and pulp industries, and marine environments.