Joint PTFE en V - Joint de bride PTFE auto-énergisant

Le PTFE V-Type Gasket from Chunhuan uses a V-shaped geometry and high-quality PTFE (pure or enhanced) to achieve a pressure-activated, self-tightening seal. Engineered for extreme chemical resistance and ultra-high purity environments, it is ideal for sealing flanges on valves, pumps and pipework subjected to highly corrosive media and stringent cleanliness requirements.

Key features & benefits

• Outstanding chemical resistance — inert PTFE resists >98% of acids, alkalis and solvents (including many strong corrosives).

• Self-sealing V-structure — the V profile elastically deforms under flange pressure to improve sealing and compensate for flange irregularities.

• Ultra-pure & non-polluting — pure PTFE variant passes FDA / USP Class VI requirements for low extractables.

• Wide temperature range — reliable from cryogenic temperatures (-200°C) up to +260°C (short peaks to 300°C).

• High pressure capability — rated up to 25 MPa; actual service pressure depends on flange design and bolt preload.

• Long service life & low maintenance — excellent anti-aging and creep resistance (glass-fiber option further improves anti-creep under high load), reducing downtime and lifecycle cost. Field applications report significant reduction in flange maintenance needs.

Material options & when to choose

• Pure PTFE (virgin): for highest chemical inertness and medical/pharma/semiconductor purity.

• Glass-fiber filled PTFE: improved mechanical strength and anti-creep for sustained high-pressure service.

• Graphite modified PTFE: improved thermal conductivity and stability under rapid temperature cycling.
  (Thicknesses, ID/OD and cross-section can be customized per customer requirements.)

Technical specifications

• Matériau : PTFE (pure or modified)

• Working Temperature: -200°C to +260°C (short-term to 300°C)

• Max Working Pressure: ≤ 25 MPa (~3,626 psi)

• Density: 2.1–2.3 g/cm³

• Dielectric Strength: 10 kV/mm

• Contraction (Shrink) Percentage: < 0.4%

• Elongation at Break: ≥ 150%

• Water Absorption: < 0,01%

• Tensile Strength: ≥ 15,0 MPa

• Transparency: Opaque

• Specification / Sizes: As per customer requirement (custom ID/OD/thickness available)

• Trademark / Brand: Chunhuan

• Origin: China

• Transport Package: Standard export package (moisture-proof + carton; palletized for bulk)

Typical applications

• Semiconductor wafer processing lines and ultra-pure chemical delivery systems

• Biopharma / vaccine reactors and piping where zero contamination is required

• Valves, pumps and flanges in highly corrosive chemical plants (including HF-containing streams where appropriate)

• LNG cryogenic valves and deep-cold pipelines

• Geothermal steam systems, chemical reactors and high-purity battery electrolyte transfer lines

Installation & compatibility notes

• Ensure flange face condition and bolt preload follow standard flange assembly practice — the V-type gasket requires correct compression to activate self-sealing.

• For critical services (toxic gases, HF, oxygen systems, etc.), verify material selection (pure vs filled PTFE) and conduct compatibility checks per media and temperature.

• When replacing metal or elastomer gaskets with PTFE V-type gaskets, confirm groove/seat dimensions or provide custom machining drawings.

Quality, certification & performance claims

• Produced under strict quality controls; options for FDA / USP Class VI validated material.

• Designed to support customers’ EHS targets and to meet ISO 15848 micro-leakage requirements when correctly specified and installed.

• Field deployments have demonstrated significant reductions in maintenance and downtime when replacing conventional gasket systems.

Packaging & delivery

Sheets / cut gaskets are packed in clean, moisture-proof film and export cartons. Bulk orders palletized. Lead time depends on quantity and customization — contact us for specific delivery schedule and FOB/CIF quotes.

Why choose Chunhuan PTFE V-Type Gasket?

Chunhuan combines high-purity PTFE materials with an optimized V-type geometry to deliver a dependable, low-maintenance sealing solution for the toughest chemical and ultra-clean environments. Customizable, certified, and proven in demanding industries — engineered to minimize leakage risk and lifecycle cost.