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What is PCTFE?

PCTFE(Polychlorotrifluoroethylene) is a fluorocarbon-based polymer. It offers a unique combination of physical and mechanical properties, nonflammability, and low permeation capability to moisture and steam atmosphere compared to other plastics. The heat resistance and chemical resistance capability are less than PFA and FEP, however, mechanical characteristics(especially hardness) are superior. It is suitable for utilizing in the temperature range of -200℃～150℃, especially for cryogenic applications such as oxygen, hydrogen, nitrogen, and more. PCTFE has a very strong resistance performance to low temperatures.

Property List of PCTFE

Item	Color	Density	Hardness	Compressive strength	Long-term Temp.
Units		g/cm3	Shore D	Mpa	℃
Value	Translucent	2.13	75-85	80	-80~115

Ball Valve Seats

Seats and inserts, which are important components in the valve industry, are critical components, PTFE is very often chosen as the raw material. PTFE provides a low-friction seat, with excellent media compatibility. Filled grades provide wear resistance and can support seating loads of the higher class of valves.

Butterfly Valve Seats

PTFE is one of the Butterfly Valve Seat Materials. PTFE Butterfly Valve Seats Are Available in Pure or Reinforced PTFE to Meet Specific Requirements for Different Working Environments.

PTFE Seats’ Excellent Chemical Resistance, High-Temperature Resistance, Self-lubrication, and Low Friction Properties of PTFE Make It a General Material for Valve Seats.

VALVE SEAT MATERIAL SELECTION

Material Name	Main Properties	Notes	Temperature Range
VIRGIN PTFE	Very low coefficient of friction and excellent chemical resistance.	FDA approved	-40°C to 260°C
15% Glass Filled PTFE	Decreased compressive strength and lower deformation under load than virgin PTFE.	Abrasive material	-40°C to 260°C
25% Glass Filled PTFE	Similar to 15% Glass better wear resistance, higher compressive strength, and lower deformation under load.	Abrasive material	-40°C to 260°C
Stainless Steel Filled PTFE	Extremely hard-wearing. Excellent strength and stability under extreme loads and elevated temperatures.	Can be used in steam and thermal fluid applications	-40°C to 260°C
TFM	Much denser polymer structure than Virgin PTFE. Displays better stress recovery.	Modified TFE Polymer	-40°C to 260°C
Carbon Graphite filled TFM	Lower thermal expansion-contraction rate than conventional TFM.	Ideal for use in steam and thermal fluid applications	-40°C to 260°C and even 320°C on Thermal Fluid applications
UHMWPE	Highly resistant to corrosive chemicals, with the exception of oxidizing acids and organic solvents.	Also known as High Modulus Polyethylene (HMPE) or High-Performance Polyethylene (HPPE)	-40°C to +80°C
PCTFE	Excellent for cryogenic and Oxygen use.	A homo-polymer of Chlorotrifluoroethylene	-270°C to 260°C
Virgin PEEK 450G	Excellent chemical resistance and mechanical properties at elevated temperatures.	An organic polymer thermoplastic	-40°C to 260°C
Carbon Filled PEEK	Many similar properties to Virgin PEEK. Particularly suitable for elevated temperatures and high-load situations.	Low coefficient of friction and suitable for many extremely corrosive applications	-40°C to 260°C
PEEK HT	Retains all key features and benefits of PEEK 450G but retains physical properties to a higher temperature.	Can be supplied in both virgins unfilled or as-filled compounded material	up to 260°C
Acetal and Delrin	Displays good resistance to wear and deformation under load.	Excellent for valve seat applications	up to 80°C