Poly Fluoro Ltd Ltd. employs a range of filled and unfilled grades to offer a diverse range of seals for a variety of OEM applications.
Polymers employed include PTFE, PEEK, POM (Delrin), PVDF, PA66, PVC, UHMWPE, and PPS, to name just a few.
Our typical range of parts includes, but is not limited to
Back-up rings
Thrust washers
Ball-valve seats
Butterfly valve seats
Piston ring seals
Rotary shaft seals
Spring-energised seals
Lip seals
Tapered valves
V-packings
Chevron seals
Parts are CNC machined to tolerances of up to 10 microns – which is in line with best-in-class global tolerance norms.
Our parts go through a rigorous inspection process, including raw material inspection, in-process inspection, and final inspection. All parts are assigned batch numbers with full traceability to the raw material and process parameters.
For high volume parts, special inspection gauges and fixtures are employed to ensure 100% inspection before dispatch.
Material selection is essential in getting the correct solution for a given application. Poly Fluoro Ltd understands the strengths and limitations of each material and accordingly works with the end-users to narrow in on the most effective option.
| Material Name | Main Properties | Notes/Applications | Temperature Range |
|---|---|---|---|
Virgin PTFE |
Very low coefficient of friction and excellent chemical resistance. Soft and easily machinable. Will deform under high loads |
FDA approved |
-40°C to 260°C |
15% Glass filled PTFE |
Decreased compressive strength and lower deformation under load than virgin PTFE. Reduced creep |
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 on steam and thermal fluid applications Highly abrasive |
-40°C to 260°C |
TFM |
Much denser polymer structure than Virgin PTFE. Displays better stress recovery. |
Modified TFE Polymer Can be welded for fabrication Excellent for bellows and diaphragms |
-40°C to 260°C |
Carbon Graphite filled PTFE |
Lower thermal expansion-contraction rate than conventional PTFE Harder than normal PTFE |
Ideal for use on steam and thermal fluid applications Excellent for V-packings and Chevron Rings |
-40°C to 260°C and even 320°C on Thermal Fluid applications |
UHMWPE |
Highly resistant to corrosive chemicals, with the exception of oxidising acids and organic solvents Extremely high wear resistance |
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 |
Excellent chemical resistance and mechanical properties at elevated temperatures High tensile strength and dimensional stability |
FDA approved Most effective as a seal, backup ring, V-packing or Chevron seal Used as rotary seals in Nuclear applications |
-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 |
Glass filled PEEK |
Many similar properties to Virgin PEEK. Particularly suitable for elevated temperatures and high load situations. |
Low coefficient of friction and suitable for high wear applications |
-40°C to 300°C |
PTFE filled PEEK |
Many similar properties to Virgin PEEK. Particularly suitable for elevated temperatures and high load situations. |
Higher lubricity than Virgin PEEK. Suited to sealing applications where start-stop or rotary motions are involved at higher RPMs |
-40°C to 260°C |
Acetal or Delrin |
Displays good resistance to wear and deformation under load Easy to machine; dimensionally very stable |
Excellent for valve seat applications Excellent for ferrules, probes and sensors |
up to 80°C |
PPS or Ryton |
Excellent chemical resistance and mechanical properties at elevated temperatures High tensile strength and dimensional stability |
Used extensively in pulp and paper manufacturing as it resists chemicals specific to this industry Cost effective alternative to PEEK |
-40°C to 220°C |
PVDF or Kynar |
Excellent chemical resistance High tensile strength and dimensional stability Resistant to creep |
Used in chemical industries for linings, fittings, and sleeves Excellent in semi-conductor components |
-40°C to 220°C |
PA or Nylon |
Displays good resistance to wear and offers thermal and electrical insulation in moderate conditions Easy to machine; dimensionally very stable. Inexpensive |
Excellent as bobbins, sliding elements, and insulating sheaths PA6, PA66, and PA12 variants - can be filled with glass or PTFE for enhanced properties |
up to 80°C |
PEI or Ultem |
High chemcial resistance Excellent dielectric strength Can be both compression and injection moulded |
Finds application in waste water management, chemical processing, heavy electricals, and medical equipments |
up to 180°C |
PI or Kapton |
Among the strongest polymers with superior resistance to both impact and temperature As a film, it exhibits excellent dielectric stregth |
Used as an insulation material in film form Can be compression moulded to make high-strength seals and valves |
-250°C to 400°C |
