PTFE Gasket & Envelope Seals
Provides resilient, creep-resistant flange sealing across all chemical process pipelines. Bhudev Polymer manufactures solid PTFE gaskets, expanded PTFE (ePTFE) sheets, and composite envelope gaskets with virgin PTFE jackets surrounding non-asbestos or corrugated stainless steel inserts.
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Quick ReplyKey Engineering Highlights
- Virgin fluoropolymer jacket provides 100% chemical inertness
- Resilient insert core maintains high recovery and prevents bolt relaxation
- Low seating stress required for tight shut-off on lined and fragile flanges
- Precision CNC cut to exact ANSI B16.21 and DIN standard dimensions
All components are manufactured in our specialized industrial facility located at GIDC Chhatral, Dist. Gandhinagar, Gujarat. The seamless fluoropolymer liner completely shields all wetted metal surfaces from chemical attack and fluid contamination.
Available Construction Variants
- Solid PTFE Flat Gasket
- V-Type PTFE Envelope Gasket
- Expanded PTFE (ePTFE) Sheet Gasket
| Technical Parameter | Verified Specification Standards |
|---|---|
| Lining Material | 100% Virgin PTFE / ePTFE |
| Body Material | Pure PTFE or PTFE with CNAF / Stainless Steel Corrugated Core |
| Size Range | 1/2" (DN15) to 24" (DN600), custom thicknesses 1.5mm, 3mm, 5mm |
| Pressure Rating | Class 150# / Class 300# / PN10 / PN16 / PN40 |
| Temperature Range | -200°C to +260°C |
| End Connection | Full Face (FF) and Raised Face (IBC) Flange Standard |
| Testing Standards | ASTM F36, ASTM F37, DIN 28091 |
Lining Fluoropolymer Options
We select virgin grade fluoropolymers matched precisely to process chemistry and operating temperature:
- PTFE: -29°C to +200°C, universal chemical inertness, in-house paste extrusion.
- PFA: -29°C to +200°C, melt-processable, superior clarity and permeation resistance.
- FEP: -29°C to +150°C, high dielectric strength and smooth non-stick surface.
- PVDF / PP / HDPE: Cost-effective options for mild corrosive and water treatment lines.
Housing & Metallurgy Options
Rugged metallic outer shells provide high pressure containment and mechanical strength:
- Cast Steel: ASTM A216 Gr. WCB for heavy-duty pressure valves and fittings.
- Carbon Steel Pipe: ASTM A106 Gr. B seamless pipe spools with A105 flanges.
- Ductile Iron: ASTM A395 / GGG40.3 for economical vibration-absorbing installations.
- Stainless Steel: CF8 / CF8M (SS304/SS316) for highly corrosive external plant atmospheres.
