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China Gear Operated Wafer Butterfly Valve Suppliers - High-Quality Factory Options for DN25-DN1200 Applications
Features
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Ensures a completely leak‑free seal when subjected to the full rated pressure.
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Only two components—the seat and the disc—are wetted by the medium.
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Ideally suited for applications where the flow medium is abrasive or erosive.
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Designed with a replaceable cartridge seat. The seat is formed by a reinforced backing ring with the elastomer vulcanized to it. When the valve is installed between pipe flanges, this sturdy seat stays firmly in place, resisting any distortion or shifting. The cartridge configuration also avoids common issues such as elastomer stretching or bending in front of the disc during operation.
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A broad range of material options is available.
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A standardized actuator mounting flange is provided, allowing operators to be easily interchanged.
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Side thrust loads are handled by a top bushing.
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Preloaded contact between the flattened seat surface and the disc hub creates the hub seal, delivering reliable sealing regardless of disc position.
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The disc and stem are formed as a single, wafer‑thin unit that creates minimal flow resistance.
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The seat can be replaced in the field, effectively separating the body and stem from the flow medium.
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Molded‑in O‑rings take care of flange sealing, making separate gaskets unnecessary.
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Universal mounting flange: The actuator flange is integrally cast and conforms to ISO 5211 dimensions, enabling it to accept a full array of operators—including 10‑position handle kits, gear operators, 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 | Gear Box | Ductile iron / Aluminum |
| 6 | Bushing | PTFE / Bronze |
| 7 | O Ring | NBR / EPDM / VITON |
Valve Standard
| Category | Details |
|---|---|
| Type | Wafer |
| 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)
Frequently Asked Questions
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What makes this butterfly valve suitable for abrasive or erosive media?
The valve is specifically designed so that only two components—the seat and the disc—come into contact with the flow medium. This minimizes the surface area exposed to abrasive or erosive fluids, significantly extending service life and reducing maintenance requirements.
Q
Can the seat be replaced without removing the valve from the pipeline?
Yes. The valve features a replaceable cartridge seat design that allows field replacement. This effectively separates the body and stem from the flow medium during maintenance, reducing downtime and overall cost of ownership.
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What actuator types are compatible with this valve?
The integrally cast actuator flange conforms to ISO 5211 dimensions, making it compatible with a wide range of operators including 10‑position handle kits, gear operators, electric actuators, and pneumatic actuators. This universal mounting design allows for easy interchangeability.
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What pressure ratings and international standards does this valve comply with?
The valve is rated for PN10, PN16, 150PSI, 200PSI, and Class 150 pressures. It complies with major international standards including API609, EN593, EN558-1 Series 20, DIN3202 K1, and ISO5752 for face-to-face dimensions, and EN1092, JIS, ANSI, AS Table D/E, and SANS for flange drilling.
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What seat materials are available, and how do I choose the right one?
A broad range of seat materials is offered, including EPDM, NBR, Buna, Viton, PTFE, Hypalon, Silicone, and Neoprene. Selection depends on the media type, temperature, and chemical compatibility requirements of your application. For example, EPDM is ideal for water and steam, Viton for chemical resistance, and PTFE for highly corrosive media.
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What industries and applications is this 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 production, and marine applications.