| SEAT INSERT MATERIALS | ||||||
|---|---|---|---|---|---|---|
| STARLINE CODE | SEALS MATERIALS |
TEMPERATURE RANGE | Applications |
Notes |
||
| C | F | |||||
| SOFT | S | REINFORCED PTFE 20% Carbon + 5% Graphite |
-190 +250 |
-310 +482 |
Natural Gas, Steam Service, Diathermic Oil,Hydrocarbons, H2S, Medium Pressure, Low / High Temperature | Higher Temp. and Pressure than VIRGIN PTFE. Good for Steam Service |
| T | VIRGIN PTFE | -196 +200 |
-319 +392 |
Hydrocarbons H2S, All Chemicals, Natural Gas, low pressure | All services subject to temperature limitation | |
| HARD | N | DEVLON – V POLYAMIDE – NYLONE |
-100 +155 |
-148 +311 |
Hydrocarbons, H2S, All chemicals, Natural Gas, High Pressure | Good for high pressure applications. Not good for water |
| D | DELRIN ACETAL RESIN |
-70 +95 |
-94 +203 |
Hydrocarbons Nace. Co2. High pressure, Low temperature | Do not use for oxygen | |
| P | PEEK POLYETHER KETONE |
-80 +220 |
-62 +428 |
Hydrocarbons, Nace. For Tobacco and Nuclear Service | High pressure High temperature |
|
| E | VESPEL SP 21 POLYMIDE |
-200 +260 |
-328 +500 |
Good Chemical Resistance. For Gas, Oil, Petroleum. Not for Steam | High pressure High temperature |
|
| U | UHMWPE POLYETHILENE |
-150 +150 |
-240 +300 |
Food and Tobacco industries. Nuclear Service | Low pressure Low torque |
|
| Z | TEFZEL EFTE (704-25) |
-100 +180 |
-73 +350 |
Good Chemical Resistance. Nuclear Service | Medium pressure. Low temp. – High temp. |
|
| Y | PFA | -196 +260 |
-319 +500 |
Lower Porosity – Particularity Good to Avoid Polymerisation | Medium pressure. Low / Medium Temperature |
|
| SEAL MATERIALS | ||||||
|---|---|---|---|---|---|---|
| MATERIAL TYPE | TEMPERATURE RANGE | APPLICATION | ||||
| “O” RINGS | N | NITRILE | NBR | -30°C / -22°F | +120°C / +248°F | Water service |
| M | HYDROGENATED NITRILE | HNBR | -30°C / -22°F | +160°C / +320°F | High Pressure Water | |
| E | MODIFIED HYDROGENATED NITRILE | HNBR | -40°C / -40°F | +160°C / +320°F | Sweet gas mixture, Hydrogen Sulphide up to 10%, Amine Corrosion Inhibitors up to 5%, Methanol | |
| v | FLUOROELASTOMERS(VITON B) | FKM | -20°C / -4°F | +220°C / +428°F | Standard Viton used on lower pressures | |
| V | FLUOROELASTOMERS(VITON AED) | FKM | -20°C / -40°F | +220°C / +428°F | Sweet gas mixtures and armonic hydrocarbons. ED service | |
| V | FLUOROELASTOMERS(VITON GLT) | FKM | -40°C / -40°F | +220°C / +428°F | Lower temperatures than standard Viton | |
| C | PERFLUOROELASTOMERS (CHEMRAZ 528) | FFKM | -25°C / -13°F | +250°C / +482°F | Good chemical resistance, High temperature, H2S, Xylene, Toluene contents | |
| K | PERFLUOROELASTOMERS (KALREZ) | FFKM | -20°C / -4°F | +327°C / +620°F | Good extrusion and chemical resistance. Excellent resistance to Sour oil and Amine | |
| A | AFLAS | FEPM | +5°C / +41°F | +200°C / +392°F | Sour gas mixtures and amine based corrosion inhibitors. Good for hot water and steam | |
| I | SILICON+PFA | -60°C / -76°F | +240°C / +464°F | Low temperature applications / Good chemical resistance | ||
| SPECIAL | G | EXPANDED GRAPHITE | -240°C / -400°F | +680°C / +1256°F | Used on Metal Seated High Temperature valves | |
| L | PTFE+ELGILOY | -196°C / -320°F | +260°C / +500°F | Good for Chemical Resistance and Low Temperature | ||
| FIRE SAFE SEAL | ||||||
|---|---|---|---|---|---|---|
| MATERIAL TYPE | TEMPERATURE RANGE | APPLICATION | ||||
| G | GRAPHITE | -240°C / -400°F | +680°C / +1256°F | Back up seal for fire safe valves | ||
API