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PTFE Coated Butterfly Valve (Wafer Type) for Chemical Applications - China Suppliers & Factory Direct Sales
⚙️ 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 erosive media
- 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
- 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 — cast-in actuator flange universally designed per ISO 5211 standard dimensions
- Accommodates all types of operators: 10-position handle kits, gear operators, electric actuators, and pneumatic actuators
🔩 Materials Of Main Parts
| ITEM | PART NAME | MATERIAL |
|---|---|---|
| 1 | Body Material | WCB / Ductile Iron / CF8 / CF8M Etc. |
| 2 | Seat Material | PFA / PTFE |
| 3 | Stem Material | SS420 / SS410 / SS416 / SS316 / SS304 / Duplex Stainless Steel Etc. |
| 4 | Disc Material | WCB+PTFE / CF8+PTFE / CF8 / CF8M / CF3M / CF8+PFA / WCB+PFA 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
❓ Frequently Asked Questions
Q
What is a PTFE-coated wafer butterfly valve and what are its main advantages?
A PTFE-coated wafer butterfly valve is a quarter-turn flow control valve with a PTFE or PFA-lined seat and disc, designed for bubble-tight shut-off. Its key advantages include excellent corrosion resistance, superior performance with erosive media, minimal parts in contact with the medium, and easy interchangeability of actuators thanks to the ISO 5211 standardized mounting flange.
Q
What body and disc materials are available for this butterfly valve?
The valve body is available in WCB, Ductile Iron, CF8, and CF8M. Disc materials include WCB+PTFE, CF8+PTFE, CF8, CF8M, CF3M, CF8+PFA, and WCB+PFA, offering a wide range of combinations to suit various media and application requirements.
Q
Which international standards does this valve comply with?
This wafer butterfly valve conforms to multiple international standards including API609, EN593, EN558-1 Series 20, DIN3202 K1, and ISO5752 for face-to-face dimensions. Flange drilling complies with EN1092 PN6/PN10/PN16, JIS 5K/10K, ANSI150, AS Table D/E, and SANS standards. The actuator mounting flange follows ISO5211.
Q
What types of actuators can be used with this butterfly valve?
Thanks to the universal ISO 5211 cast-in actuator mounting flange, this valve is compatible with all common operator types, including 10-position handle kits, gear operators, electric actuators, and pneumatic actuators, making it highly versatile for automation applications.
Q
What industries and applications is this valve suitable for?
This PTFE-coated wafer butterfly 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, as well as marine applications.
Q
What pressure ratings are supported, and how is sealing ensured?
The valve supports pressure ratings of PN10, PN16, 150PSI, 200PSI, and Class 150. Sealing is achieved through a combination of the preloaded flatted seat surface against the disc hub area for positive shut-off at all disc positions, and molded-in O-rings (available in NBR, EPDM, or VITON) that provide reliable flange sealing without the need for separate gaskets.