PFA Lined Ball Valve -- Full Bore Chemical WCB
Full-Bore PFA Lined Valve for Extreme Chemical and Corrosive Service
Document No.SV-DS-BAL-012
RevisionRev A
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
This datasheet covers full-bore PFA lined ball valves in WCB for chlorine, concentrated acids, caustic soda, and semiconductor chemical distribution with complete PFA wetted surface.
Technical Specifications
| Parameter | Specification |
|---|
| Valve Size Range | DN25 to DN300 (1" to 12") |
| Pressure Rating | PN16 / Class 150 |
| Body Material | WCB carbon steel with 3-5 mm PFA liner locked into body |
| Liner Material | PFA (perfluoroalkoxy) 3-5 mm thick, locked and keyed design |
| Ball Material | SS316 core ball with full PFA encapsulation |
| Seat Material | PFA integral seat moulded into liner |
| Stem Material | SS316 stem with PFA washer and anti-extrusion collar |
| Packing | PTFE V-ring packing with live-loading gland |
| Gaskets | PFA envelope gaskets for flange joints |
| Temperature Range | -20°C to +180°C (PFA liner limit) |
| End Connections | Flanged ASME B16.5 / BS EN 1092-1 (raised face for PFA envelope gasket) |
| Features | Complete PFA wetted surface, full bore, locked liner, anti-static, wide chemical compatibility |
Materials of Construction
| Component | Material |
|---|
| Body | WCB carbon steel casting with 3-5 mm thick PFA liner locked and keyed into body bore to prevent vacuum collapse |
| Liner | PFA (perfluoroalkoxy) high-purity liner, moulded and machined to close tolerance, locked into body with anti-rotation keys |
| Ball | SS316 solid core ball with full PFA encapsulation; PFA thickness 2-3 mm on wetted surfaces |
| Seat | PFA integral seat moulded into liner body, lapped to ball tolerance for bubble-tight shutoff |
| Stem | SS316 stem with PFA thrust washer and anti-extrusion collar to prevent liner displacement |
| Packing | PTFE V-ring packing with Belleville spring live-loading for constant compression without overtightening |
| Gaskets | PFA envelope gaskets with SS316 insert for flange joints; compatible with PFA liner for continuous chemical barrier |
Testing & Inspection
| Test | Requirement |
|---|
| Test Standard | API 598 / ISO 5208 / ASTM F1545 |
| Certification | CE, PED, ISO 9001, FDA on request |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | ASME B16.34 / API 608 / ISO 17292 |
Notes
- PFA liner thickness is 3-5 mm; do not attempt hot tapping or welding on valve body as this will destroy liner integrity.
- Maximum temperature is +180°C for PFA; exceeding this limit causes liner softening, distortion, and loss of shutoff.
- Vacuum service requires locked liner design with anti-rotation keys; standard push-in liners may collapse under full vacuum.
- For chlorine gas service, specify PFA-lined ball and seats with no metallic exposure to prevent chlorine-induced pitting.
- PFA envelope gaskets must be used at flanges; do not substitute with graphite or PTFE-only gaskets which may wick chemicals to metal flanges.
