| TYPE |
COLOR |
DESCRIPTION |
| VIRGIN P.T.F.E. |
White
|
Polytetraflouroethylene or PTFE.
The base formula is Teflon, invented by Roy Plun- kett, a Dupont employee in 1938. PTFE is a flourocarbon solid, consisting wholly of carbon and flourine. PTFE has one of the lowest coefficient friction against any solid such as machined metal ball. PTFE has excellent dielectric properties, has no memory and thus subject to creeping.
Temperature range:
-100°F to 400°F
|
| REINFORCED P.T.F.E. |
Off-White
|
Reinforced Polytetrafluoroethylene.
15% Glass fibers are added to PTFE for mechanical strength and better wear resistance. In addition a slightly higher temperature and pressure resistance is realized vs. PTFE. Not recommended for caustic service.
Temperature range:
-100°F to 450°F
|
| TFM-1600 |
Off-White
|
Also commonly known as Dyneon, a 3M creation. TFM-1600 is basically a modified PTFE polymer, which as a lower permeability and density vs. PTFE. This allows for a higher temperature and reduced deformation capability to PTFE.
Temperature range:
-100°F to 450°F
|
| CARBON FILLED P.T.F.E. |
Black
|
The combination of carbon and graphite blended in PTFE. This allows superior wear resistance vs. PTFE and RTFE, and lower deformation under increased pressures. Highly used in steam applications, and contains great lubricity in terms of torque valves.
Temperature range:
-100°F to 500°F
|
| UHMW - ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE |
Off-White
|
Ultra High Molecular Weight Polyethylene.
A thermoplastic polyethylene that is a tough material within high impact strength. UHMW is odorless, tasteless, and non-tox- ic, and self-lubricating. It is also highly resistant to abrasion and its coeffecient to friction is similar to PTFE.
Temperature range:
-70°F to 200°F
|
| PEEK |
Beige
|
Polyetheretherketone.
An organic thermal polymer with excellent mechanical and chemical resistance, especially at high temperature and pressure. Delivers extended high temperature performance. It does not have the coefficient of friction like PTFE, thus it is very hard at normal or lower temperatures. Good resistance to fuels and oils, however, cannot be used with sulfuric acid.
Temperature range:
35°F to 600°F
|
| DELRIN |
Dark Gray
|
Polyoxmethylene.
A Dupont trademark which is Polyoxmethylene, also known as Acetal or POM. A homo polymer that possesses high tensile strength and stiffness properties, without the use of reinforcement. Has chemical resistance to fuels and solvents, and has good wear and abrasion resistance. Can be ideal for high pressure service, but is limited by temperature.
Temperature range:
-70°F to 180°F
|
| NBR/BUNA-N /NITRILE |
Dark Gray
|
NBR/Buna-N/Nitrile
A Dupont trademark which is Polyoxmethylene, also known as Acetal or POM. A homo polymer that possesses high tensile strength and stiffness properties, without the use of reinforcement. Has chemical resistance to fuels and solvents, and has good wear and abrasion resistance. Can be ideal for high pressure service, but is limited by temperature.
Temperature range:
-30°F to 250°F
|
| EPDM |
Black
|
Ethylene Propylene.
Works very well in water service. Has outstanding resistance to heat, ozone, and weather. EPDM is unsatisfactory when used with most oils, gasoline, kerosene, and acids.
Temperature range:
-40°F to 400°F
|
| SILICONE |
Red
|
Excellent for both high and low temperature variations. Fair physical properties. Re- sistant to moderate or oxidizing chemicals, ozone, concentrated sodium hydroxide. Not good for solvents, oils, and concentrated acids.
Temperature range:
-80°F to 420°F
|
| VITON ® |
Black
|
Another Dupont creation, is also known as FKM, and is excellent for oils, greases and air at both high and low temperatures. The most specified fluoroelastomer for fuel systems and acid condensates. Unsatisfactory with ketones and nitro containing compounds.
Temperature range:
-15°F to 400°F
|
