Pctfebush and PCTFE Rod Used for Cryogenic Valve Seat

• Customization: Available
• Material: PCTFE
• Kind: Thermosetting Plastics Pipe
• Model NO.: HDPCTFE009
• Density: 2.1-2.18 g/cm3
• Tensile Strength at Break: 38-48 MPa
• Modulus of Elasticity: 1.45-1.6 Gpa
• Shore D: 85
• Temperature Range: -200~120 Centigrade
• Transport Package: Export Carton, Pallet
• Specification: PCTFE
• Trademark: highdom
• Origin: China
• HS Code: 3902900090
• Production Capacity: Big&Stable

Product Description

                                                  PCTFE ROD and  PCTFE BUSH  (Polychlorotrifluoroethylene)

PCTFE is a high-performance polymer widely used in cryogenic sealing applications, particularly as a critical material for cryogenic valve seats. Below is a detailed breakdown of its key advantages and applications:

 

1. Superior Performance in Cryogenic Environments

PCTFE maintains exceptional rigidity, low thermal expansion, and toughness even at extreme low temperatures (e.g., -166°C to -57°C in LNG systems). Unlike metals, it avoids brittleness, making it ideal for valve seats in cryogenic systems such as LNG processing.

 

2. Key Properties for Valve Seat Functionality

• Chemical Resistance: Highly stable against cryogenic hydrocarbons (methane, ethane) and aggressive fluids, ensuring long-term sealing integrity.

• Low Friction & High Wear Resistance: Reduces wear during valve cycling, extending service life.

• Rapid Elastic Recovery: Quickly regains shape after load changes, ideal for dynamic sealing in frequent-operation valves.

 

3. Compatibility with Metal Components

PCTFE's low thermal expansion minimizes stress mismatch with metal valve bodies. Its high thermal conductivity helps balance temperature gradients, preventing seal failure due to thermal cycling.

 

4. Advantages Over Alternatives

• vs. PTFE: PCTFE outperforms PTFE in low-temperature rigidity and gas permeability, making it better suited for high-pressure and ultra-cryogenic conditions.

• vs. MPTFE: While modified PTFE (MPTFE) is used in some cases, PCTFE remains the top choice for extreme cryogenic valves due to its unmatched thermal and mechanical stability.

 

5. Typical Applications

• LNG Storage & Transport: Valve seats in LNG tanks, pipelines, and regasification systems.

• Air Separation Units: Cryogenic valves in oxygen/nitrogen production.

• Ultra-Low-Temperature Labs: Seals for vacuum and high-pressure systems in research facilities.

 

Summary

PCTFE's unique combination of cryogenic stability, mechanical strength, and chemical inertness makes it the material of choice for valve seats in harsh environments like LNG infrastructure. For specific technical parameters, refer to manufacturer datasheets or ASTM standards (e.g., ASTM D1430 for PCTFE properties).