VNII NP-231 grease

VNIINP-231 grease (TU 38.1011220-89) is an organic-silicon blend thickened with technical carbon DG-100. The main performance characteristics of VNIINP-231 grease: in terms of properties, it occupies an intermediate position between greases and semi-fluid pastes. The grease is characterized by frost resistance. It is efficient at residual pressure of 666.5 Pa and in the temperature range from -60 to + 250°C. It is used in close worm and screw rolling and sliding bearings, in threaded connections.


Physical and chemical indicators of VNIINP-231 grease (TU 38.1011220-89)

Name of the indicator Norm GOST (TC)
Appearance Homogeneous ointment of black color
Effective viscosity, Pa-s
at 50°C and mean gradient of strain rate 1000 s-1 1,0
at -51°C and mean gradient of strain rate 10 s-1, not more than 400
Tensile strength at 80°C, Pa, at least 150
Colloidal stability at a load of 3H, % of allocated oil, not more than 7,5
Evaporability at 200°C, %, not more than 5,0
Corrosion test Withstands
Содержание воды, %, не более 0,12
Penetration at 25 °C, 0.1 mm 10-1 Not normalised