PTFE Lined Plug Valve -- Ported Sleeve Chemical WCB
Corrosion-Resistant On/Off and Throttling Valve for Chemical Process
Document No.SV-DS-SPC-004
RevisionRev A
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
This datasheet describes PTFE-lined plug valves with fully encapsulated ported sleeve for chemical, acid, and alkali service where full corrosion resistance and moderate pressure rating are required.
Technical Specifications
| Parameter | Specification |
|---|
| Valve Size Range | DN25 to DN300 (1" to 12") |
| Pressure Rating | PN10 / PN16 / Class 150 |
| Body Material | WCB carbon steel, ductile iron GGG50, CF8M (SS316) |
| Liner Material | Virgin PTFE, PFA, or FEP full-port sleeve, 3 to 5 mm thickness |
| Plug Material | SS316 or ductile iron, fully PTFE encapsulated with ported openings |
| Temperature Range | -40°C to +180°C (PTFE), +200°C (PFA) |
| End Connections | Flanged ASME B16.5 / BS EN 1092-1 with liner-overflanged face |
| Operation | Wrench or gear operator; pneumatic / electric actuator on request |
| Lining Thickness | Minimum 3 mm at thinnest point; 5 mm for sizes above DN150 |
| Vent Cavity | Optional vented bonnet to relieve trapped media between plug and liner |
Materials of Construction
| Component | Material |
|---|
| Body | WCB carbon steel or ductile iron, machined to accept PTFE liner with anti-rotation keys |
| Liner | Virgin PTFE or PFA, isostatically moulded and sintered to body, overflanged at gasket face |
| Plug | SS316 or ductile iron core, PTFE-encapsulated, ported to match body ports |
| Stem | SS316 with PTFE thrust washer and O-ring seal below bonnet |
| Packing | PTFE V-ring set with SS316 anti-extrusion rings |
| Gasket | PTFE envelope gasket with SS316 core for body/bonnet joint |
| Wrench | Cast iron or aluminium wrench with stop pin for 90° rotation |
Testing & Inspection
| Test | Requirement |
|---|
| Test Standard | API 598 / ISO 5208 (test pressure limited by PTFE cold flow) |
| Certification | CE, ISO 9001 |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | API 599 / ASME B16.34 |
Notes
- PTFE cold-flow limits maximum pressure to PN16 / Class 150 at ambient; derate 25% at 150°C and 40% at 180°C.
- PFA liner extends temperature to 200°C with better mechanical properties; specify PFA for vacuum or cyclic temperature service.
- Vented bonnet is mandatory for toxic or noxious fluids to prevent pressurised cavity rupture; route vent to safe disposal.
- Do not use with fluorinated solvents, molten alkali metals, or elemental fluorine -- these attack PTFE.
- Liner thickness must be verified by eddy-current test after moulding; minimum 3 mm at thinnest point required.
