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Universal-Flange Wafer Butterfly Valve for Water - China Suppliers & Factory, 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 | Lugged |
| 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
For over a decade, Tianjin Guoji Valve Co., Ltd. (TGV) has been a premier manufacturer and exporter of high-performance valves, fittings, and flow control solutions. Our product portfolio spans ball valves, gate valves, globe valves, check valves, butterfly valves, expansion joints, strainers, valve actuators, flanges, and pipe fittings—giving our clients a single, dependable source for diverse industrial needs. From oil and gas and petrochemicals to HVAC and waterworks, our components are engineered to deliver reliability and efficiency in critical applications. We take pride in our customer-first approach, combining rigorous quality assurance, competitive pricing, agile responsiveness, and strict adherence to delivery timelines. Whether you're planning a new project or optimizing existing systems, our team is ready to support you with tailored solutions and expert guidance. We invite you to share your inquiry with us—tell us your requirements, and we'll respond with a competitive quotation, technical details, and the commitment to quality you can count on.
❓ Frequently Asked Questions
Q What is a lugged butterfly valve and how does it differ from a wafer butterfly valve?
A lugged butterfly valve features threaded inserts (lugs) on the valve body that allow it to be bolted directly to the pipeline flanges using separate bolts on each side. This design enables the valve to be used as an end-of-line valve and allows one side of the pipeline to be removed without disturbing the other. A wafer butterfly valve, by contrast, is sandwiched between two flanges using long bolts that pass through the entire assembly.
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 the media and operating conditions: EPDM is ideal for water and mild chemicals; NBR suits oil and petroleum products; Viton offers excellent chemical and high-temperature resistance; PTFE is preferred for aggressive chemicals. Please consult our technical team with your specific application details for the best recommendation.
Q What pressure ratings and standards does this butterfly valve comply with?
This butterfly valve is rated for PN10, PN16, 150PSI, 200PSI, and Class 150. It complies with major international standards including API609, EN593, EN558-1 Series 20, DIN3202 K1, and ISO5752 for face-to-face dimensions, and EN1092 for flange drilling. The actuator mounting flange conforms to ISO5211.
Q What types of actuators can be fitted to this valve?
The valve features a universal ISO5211-compliant mounting flange that accommodates a wide range of operators, including 10-position handle kits, gear operators, electric actuators, and pneumatic actuators. This standardized interface ensures easy interchangeability and compatibility with most actuator brands.
Q What industries and applications is this butterfly valve suitable for?
This valve is engineered for a broad 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 versatile material options make it adaptable to both clean and aggressive media.
Q Can the seat be replaced in the field, and what are the benefits 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, which prevents deformation or displacement during installation and valve cycling. This design eliminates stretching and bending of the elastomer, extends service life, and significantly reduces maintenance downtime, as the seat can be replaced without removing the valve body from the pipeline.