Grease VNIINP – 275
Chemical-resistant grease
Description
Grease VNII NP-275 according to TU 38.101891-81 radiation-resistant grease.
Applications
It is designed for a long service life of rolling bearings and plain bearings, ball screws, rack and screw drive, threaded joints operating under the effects of radiation. Has high heat resistance and chemical stability, good anti-wear, corrosion and extreme pressure properties, resistance to aggressive media. Lubrication operable for a long time at 200-250 ° C. It is recommended to apply a power screw and the threaded gear in a nuclear reactor control mechanisms at temperatures up to 250 ° C. VNIINP-275 grease manufactured by thickening perfluoropolyether organosilikagelem AM-2 brand.
Specifications
| Indicator | Norm |
|---|---|
| Appearance | Homogeneous ointment smooth texture from white to light yellow in color |
| Dropping point, ° C, at least | 250 |
| Colloid stability,%, no more than | 9 |
| Viscosity effective, Pa · s: | |
|
at? 20 ° C
| 440 – 600 |
|
at 0 ° C
| 180 – 210 |
|
at 20 ° C
| 120 – 130 |
|
at 50 ° C and an average strain rate gradient of 1000 s-1, at least
| 1,0 |
|
at 20 ° C
| 470 – 540 |
|
at 50 ° C
| 150 – 400 |
| Penetration at 25 °,? 10-1mm | 210 – 250 |
Storage life in manufacturer’s packaging 5 years.
Additional information
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