Grease VNIINP-248 (TOR 38.101643-76) has a soft consistency, high resistivity, good frost-, heat-, water resistance. Operating efficiency at temperatures ranging from -60 °C to +200 °C.
Applications: sliding electrical contacts of wire-wound-type resistors.
Appearance and color: —
Effective viscosity, Pa•s, at 0 °C, not more than: —
Effective viscosity, Pa•s, at -20 °C, not more than: —
Breaking strength at 20 °С, Pa•s, not less than: 80-250
Dropping point, °С, not below than: —
Colloid stability under load of 300 g, %, not more than: 8
The content of free alkali in terms of NaOH,%, not more than: —
Penetration at 25 °C, mm, 10-1: —
Evaporation at 200 °C within 1 hour, %, not more than: —
Mass fraction of free alkali, %, not more than: —