General Properties
PFPE greases are homogenous, white, thick and particularly resistance to oxidation and to chemical agents. Further, they are compatible with all types of material (glass, metals, elastomers, plastics, ceramics) and their properties remain unaltered over wide temperature ranges. PFPE greases can be used in the presence of water, oils, vapor and, in general, with all organic substances and solvents which are not highly fluorinated, without being removed, dissolved or modified in any way.
| Grease Type | OT 20 | UT 18 | RT 15 | Y-VAC 3 | ZLHT | ZNF |
|---|---|---|---|---|---|---|
| Viscosity of base fluid at 20°C (ASTM D 445)(cSt) |
35 | 500 | 1300 | 1500 | 150 | 250 |
| Thickener | PTFE | PTFE | PTFE | PTFE | PTFE | PTFE |
| Penetration unworked after 60 strokes (ASTM D 217) mm/10 |
280 285 |
280 285 |
276 278 |
240 245 |
280 280 |
240 40 |
| NLGI Class | 2 | 2 | 2 | 3 | 2 | 3 |
| Stability after 10000 strokes (ASTM D 217) (mm/10) |
300 | 295 | 290 | 260 | 285 | 245 |
| Anti Rust Additivation | no | no | no | no | no | no |
| Apparent viscosity Poise at 20°C Shear rate 100 sec - 1 Shear rate 300 sec -1 |
90 40 |
130 80 |
190 100 |
280 140 |
150 60 |
240 100 |
| Oil separation FTMS 791-321 Weight loss(%) |
@ 66°C/30h: 3 |
@ 149°C/30h: 6 |
@ 204°C/30h: 7.7 |
@ 204°C/30h: 8 |
@ 204°C/30h: 6.6 |
@ 204°C/30h: 8 |
| Evaporation (ASTM D 972) Weight loss(%) |
@ 66°C/22h: 0.2 | @ 149°C/22h: 0.4 | @ 204°C/22h: 0.5 | @ 204°C/22h: 0.3 | @ 204°C/22h: 2.8 | @ 204°C/22h: 0.2 |
| Range of Continuous Use Temp(°C) |
-50 to +70 | -30 to +230 | -20 to +250 | -20 to +250 | -65 to +200 | -60 to +200 |
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| Grease Type | AR 555 | GRM 30 | GRM 60 |
|---|---|---|---|
| NLGI Class (ASTM D217) |
2 | 2 | 2 |
| Density(g/cm3), 20°C (ASTM D891) |
2 | 2 | 2 |
| Kinematic Viscosity(cSt) (ASTM D445) |
@20°C: 1500 @40°C: 420 @100°C: 40 |
@20°C: 280 @40°C: 159 @100°C: 45 |
@20°C: 550 @40°C: 310 @100°C: 86 |
| Viscosity Index(cSt) (ASTM D2270) |
135 | 338 | 343 |
| Vapor Pressure(torr), @20°C | 3.9 x 10-11 | 1.4 x 10-8 | 3.5 x 10-9 |
| Weight loss(%) @204°C/30hr (ASTM D2595) |
0.5 | 0.3 | |
| Oil Separation(%) @204°C/30hr (FTMS 791-321) |
7.2 | 10.7 | 6.1 |
| Anti-rust Additivation | yes | no | no |
| Emcor Test(DIN 51802) | 1/2 | NA | NA |
| Penetration(mm/10) @25°C (ASTM D217, worked 60 strokes) |
290 | 277 | 275 |
| Speedy Factor(dm.n) | 250,000 | 500,000 | 400,000 |
| Cont. Service Temp. Range(°C) | -20 to +250 | -60 to +200 | -50 to +230 |
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Typical Applications
- Aircraft instrument bearing grease.
- Taper plug valve, gaskets, and joint bearings in aircraft fuel systems.
- Valve and O-ring lubricant in oxygen service.
- Impregnate for O-rings in pharmaceutical equipment.
- Pump seal and bearing lubricant in chlorine or strong oxidizer service.
- Spindle and actuator bearings in disk drives.
- Lubricate gears, bearings, and pulleys in Class 100 or cleaner manufacturing areas.
- Mechanical components of cameras used in deep space.
- Astronaut space suit bearing and breathing apparatus lubricant.
- Oven conveyor chain and bearing lubricant.
- Mold release agent for plastic injection molding.
- Plasma etching equipment lubricant.
- Robots in wafer handling, clean room, and commercial environments.
- Air conditioning bearing and cabin pressurization valves on aircraft.
- Vacuum grease in semiconductor processing.
- Top coating lubricant on computer disc drives.