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China Supplier Factory Stainless Steel Wafer Butterfly Valve for Versatile Applications (DN25-DN1200)
⚙ Features
✓Bubble-tight shut-off at full pressure rating
✓The seat and the disc are the only two valve parts in contact with the medium.
✓Superior design for abrasive and erosive media.
✓Replaceable cartridge seat — The replaceable seat consists of a reinforced back-up ring, on which the elastomer seat material is vulcanized. When mounting the valve between the pipe flanges this stable seat cannot be deformed or displaced. The cartridge design also prevents deformation when the valve is cycled, such as stretching and bending of the elastomer in front of the moving disc.
✓Large number of material combinations available.
✓Standardized actuator flange for easy operator interchangeability.
✓Top bushing absorbs side thrust loads.
✓Hub seal provided by preloaded contact between flatted seat surface and disc hub area for positive sealing at all disc positions.
✓One-piece wafer thin disc stem gives the very minimum obstruction to flow.
✓Field replaceable seat isolates the body and stem from the flow.
✓Molded-in O-rings provides flange sealing and eliminates need for gaskets.
✓Universal Mounting Flange — The cast-in actuator flange is universally designed in accordance with ISO 5211 standard dimensions. The mounting flange can accommodate all types of operators such as: 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 | Hand Lever | Malleable iron / Stamping steel / Aluminum / Stainless Steel |
| 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 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
🏢 Company Strength
Tianjin Guoji Valve Co., Ltd. (TGV) has built a strong reputation as a reliable manufacturer and exporter of premium valves, fittings, and related accessories. Our comprehensive product offering includes ball valves, gate valves, globe valves, check valves, butterfly valves, expansion joints, strainers, actuators, flanges, and pipe fittings—all designed to meet the demanding requirements of sectors such as oil and gas, petrochemicals, HVAC, and waterworks. We differentiate ourselves through a steadfast commitment to quality, competitive pricing, fast response times, and strict adherence to delivery schedules. Every product reflects our dedication to providing complete, dependable solutions tailored to our customers' operational needs. We look forward to hearing from you—send us your inquiry today, and let us demonstrate how our expertise and service can add value to your next project.
❓ Frequently Asked Questions (FAQ)
QWhat is a wafer butterfly valve and how does it work?
A wafer butterfly valve is a quarter-turn valve that uses a disc mounted on a rotating stem to regulate or shut off fluid flow. The disc rotates 90° to open or close the flow path. The wafer design means it fits between two pipe flanges without the need for additional flanges on the valve body itself, making it compact and lightweight.
QWhat 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 choice depends on the media and operating temperature: EPDM is ideal for water and mild chemicals; NBR suits oils and fuels; Viton is recommended for high-temperature or aggressive chemical applications; PTFE is preferred for highly corrosive or high-purity media.
QWhich pressure ratings and flange standards does this valve support?
This wafer butterfly valve supports pressure ratings of PN10, PN16, 150PSI, 200PSI, and Class 150. It is compatible with multiple flange drilling standards including EN1092 PN6/PN10/PN16, JIS 5K/10K, ANSI 150, AS Table D/E, and SANS, providing broad international compatibility.
QCan this valve be used with electric or pneumatic actuators?
Yes. The valve features a universal mounting flange cast in accordance with ISO 5211 standard dimensions, which allows it to accommodate all common operator types including 10-position handle kits, gear operators, electric actuators, and pneumatic actuators — enabling easy automation and operator interchangeability.
QWhat industries and applications is this butterfly valve suitable for?
This valve is widely used across HVAC systems, water supply and sewage treatment, food and beverage processing, chemical and petrochemical industries, power generation and utilities, paper and pulp manufacturing, and marine applications. Its wide range of material combinations makes it adaptable to diverse media and operating environments.
QIs the seat replaceable in the field, and what are the advantages of the cartridge seat design?
Yes, the seat is fully field-replaceable. The cartridge seat design consists of a reinforced back-up ring with vulcanized elastomer seat material, which prevents deformation or displacement when the valve is installed between pipe flanges. This design also prevents stretching and bending of the elastomer during valve cycling, significantly extending service life and reducing maintenance downtime.