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Pneumatic Actuated Butterfly Valve - China Suppliers & Factory for DN25-DN1200 Concentric Models
★ 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
Looking for a reliable partner in valves and fittings? Tianjin Guoji Valve Co., Ltd. (TGV) has been delivering excellence since 2007. As a premier manufacturer and exporter, we offer a complete range of products—ball valves, gate valves, globe valves, check valves, butterfly valves, expansion joints, strainers, actuators, flanges, pipe fittings, and more. Our solutions serve critical industries, including oil and gas, petrochemicals, HVAC, and waterworks. What makes us different? Uncompromising quality control, competitive pricing, rapid response, and on-time delivery—every time. From standard components to customized system solutions, we are equipped to support your projects with precision and dedication. Ready to discuss your requirements? Send us your inquiry now—let us show you the value of working with a partner who truly delivers.
❓ Frequently Asked Questions (FAQ)
Q
What is a wafer butterfly valve and how does it work?
A wafer butterfly valve is a quarter-turn valve designed to regulate or isolate flow in a pipeline. It is installed between two pipe flanges without the need for additional bolting. The disc rotates 90° to open or close the flow path, providing bubble-tight shut-off at full pressure rating. Its compact, lightweight design makes it ideal for space-restricted installations.
Q
What seat materials are available for the butterfly valve?
We offer a wide range of seat materials to suit different media and operating conditions, including EPDM, NBR (Buna), Viton, PTFE, Hypalon, Silicone, and Neoprene. The replaceable cartridge seat design ensures easy maintenance and long service life without valve removal from the pipeline.
Q
Which pressure ratings and international standards does this 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, ISO5752 for face-to-face dimensions, and EN1092 for flange drilling patterns (PN6/PN10/PN16/JIS 5K/10K/ANSI150/AS Table D&E/SANS). The actuator mounting flange conforms to ISO5211.
Q
What types of actuators are compatible with this butterfly valve?
The valve features a universal ISO5211 actuator mounting flange that is compatible with all major operator types, including 10-position handle kits, gear operators, electric actuators, and pneumatic actuators. This standardized interface ensures easy operator interchangeability and flexibility for automation upgrades.
Q
What industries and applications is this butterfly valve suitable for?
This valve is designed for a broad range of demanding 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. Its superior design for abrasive and erosive media makes it especially versatile.
Q
Can TGV provide customized valve solutions and what is the lead time?
Yes. Tianjin Guoji Valve Co., Ltd. (TGV) offers both standard and fully customized valve solutions tailored to your project specifications, including material combinations, body types, and actuation configurations. With over 15 years of manufacturing experience, TGV is committed to competitive pricing, rapid response, and on-time delivery. Please send your inquiry with technical requirements for a prompt quotation.