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China U Type Rubber Seat Butterfly Valve - Gear Operated Waterworks Supplier and Factory, 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
Tianjin Guoji Valve Co., Ltd. is an export-oriented valve manufacturer with 15,332 square meter factory area, which has strong capability of R&D, Manufacture, Trading and Service. Now our company has passed the Lloyd's Register (LR) ISO9001: 2015 quality management system certification (ISO Approval number: ISO 9001 – 00033059) and CE/PED certification (EU Certificate Of Conformity). (Certificate No: 0343/PED/SHA/BJG00001668/A).
TGV's products covered Butterfly valves, Check valves, Strainers, Gate valves, Ball valves, Globe valves, Expansion joints, Flanges and Fittings with pressure range from 0.5 to 6.4 MPa, size from DN15 to DN3000. The products also have been widely exported to more than 30 countries and regions.
We aim at deliver only quality valves with professional services, we see quality and service as life and always take our reputation and promises seriously.
❓ Frequently Asked Questions
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What is a U Type Butterfly Valve and how does it differ from other butterfly valves?
A U Type (wafer-style) butterfly valve is designed to be clamped between two pipe flanges without the need for a flanged body. Compared to lug-style or flanged butterfly valves, it is more compact, lighter in weight, and cost-effective, making it ideal for tight installation spaces and high-volume pipeline systems.
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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 media type and operating temperature: EPDM suits water and mild chemicals; NBR is ideal for oils and fuels; Viton handles aggressive chemicals and high temperatures; PTFE is recommended for highly corrosive media.
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Can the seat be replaced in the field without removing the valve from the pipeline?
Yes. The cartridge-style seat is designed for field replacement. It can be removed and reinstalled without special tools. Once the valve is unbolted from the pipe flanges, the seat can be swapped out quickly, minimizing downtime and maintenance costs.
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What actuator types are compatible with this butterfly valve?
The valve features an integrally cast actuator flange that meets ISO 5211 dimensional standards. It is compatible with a wide range of operators including 10-position handle kits, worm gear actuators, electric actuators, and pneumatic actuators, allowing flexible automation options.
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What pressure ratings and flange drilling standards are supported?
The U Type butterfly valve supports pressure ratings of PN10, PN16, 150PSI, 200PSI, and Class 150. Flange drilling standards include EN1092 PN10/PN16, JIS 5K/10K, ANSI 150, AS Table D/E, and SANS, ensuring compatibility with most global pipeline systems.
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What industries and applications is this valve suitable for?
This valve is widely used across HVAC systems, water supply and sewage treatment, food and beverage processing, chemical and petrochemical plants, power and utilities, paper and pulp industries, and marine applications. Its broad material compatibility and robust design make it suitable for both clean and abrasive media.