The grease VNIINP-233 (TOR 38.101687-77) — perfluoropolyether thickened with polymer. It possesses high thermal, mechanical, colloid stability and wear-protective characteristics. It is stable to influence of acids, efficient at temperatures from -30 °С…+250 °С.
Application: bearings of a rolling and sliding with oscillatory motions, the mating surfaces «metal-rubber». A substitute product is VNIINP-235.
Appearance and color: —
Effective viscosity, Pas, at 0 °С, not more than: 100
Effective viscosity, Pas, at -50 °C, not more than: —
Strength at 80 °С, Pas, not less than: 50-60
Drop temperature, °С, not lower than: —
Colloid stability under load of 300 g, %, not more than: 10
The content of free alkali in recalculation on NаОН, %, not more than: —
Penetration at 25 °С, mm, 10-1: 310-340
Evaporation at 200 °С, %, not more than: —
Data on operational temperatures represent values, which are guided by a structure of lubricants, and also on a scope and technology of use. Depending on a kind of mechanical-dynamic loading lubricants change the consistence, conditional viscosity or viscosity at various temperatures, pressure and duration of operation. These changes of indicators can affect work of components.