PCTFE Gasket Cga & Diss Connections or UHP Cylinder Connections

• Customization: Available
• Function: Fixed Sealing, Hole Sealing, Nozzle Ring Sealing, Shaft Sealing
• Application: Auxiliary Seal, Junction Surface Seal, Equipment Seal, Hydroseal, Pump Seal
• Shape (For Gasket): Ring Gasket
• Material: Engineering Plastics
• Standard: Nonstandard
• Transport Package: Export Carton
• Trademark: HIGHDOM
• Production Capacity: 500000PCS/Month

Product Description

                                                           PCTFE Gaskets for UHP Cylinder Connections

PCTFE CGA DISS (Diameter Index Safety Standard) cylinder connections are used in the Semiconductor Industry where the highest levels of purity and the lowest leak rate connections are required.

PCTFE (polychlorotrifluoroethylene) gaskets are chosen for Ultra-High Pressure (UHP) cylinder connections due to their unique combination of material properties, which make them ideal for extreme-pressure and chemically aggressive environments. Here's a breakdown of the key reasons:

1. Exceptional Chemical Resistance

• PCTFE is highly resistant to corrosive chemicals, including strong acids, bases, oxidizers, and solvents.

• This is critical for UHP systems (e.g., gas cylinders storing chlorine, hydrogen fluoride, or oxygen), where leaks or material degradation could lead to catastrophic failures.

2. High Mechanical Strength Under Pressure

• PCTFE retains its structural integrity under extreme pressures (often exceeding 10,000 psi/690 bar in UHP systems).

• Unlike softer fluoropolymers (e.g., PTFE), PCTFE has greater rigidity and compressive strength, preventing deformation or extrusion under load.

3. Low Gas Permeability

• PCTFE has one of the lowest gas permeability rates among plastics, minimizing gas leakage through the gasket material.

• This is vital for UHP gas cylinders (e.g., semiconductor-grade gases, medical gases) where even tiny leaks compromise safety or purity.

4. Thermal Stability

• PCTFE operates effectively in temperatures ranging from -200°C to +150°C, making it suitable for cryogenic UHP applications (e.g., liquid gas storage) or high-temperature processes.

Ultra-High Integrity Services Connections, DISS, are used for connecting items of gas handling equipment (such as pressure regulators or pigtails) directly to the cylinder valve outlet of a semiconductor/high-purity gas cylinder