Grease VNIINP -283 (TOR 38.101281-89) is a perfluoropolyether thickened with inorganic thickening agent, it contains a metal oxide.
The grease has good resistance to oxygen gas, it is water resistant, has good sealing properties.
Operating efficiency at temperatures ranging from -45 °C to +200 °C.
Applications: friction assemblies operating in contact with oxygen gas at a pressure up to 25 MPa, in threaded joints under the oxygen pressure inside the pipeline up to 100 MPa. The substitute product — VNIINP-282 (from — 150 °C).
Appearance and color: —
Effective viscosity, Pa•s, at 0 °C, not more than: 240
Effective viscosity, Pa•s, at -30 °C, not more than: —
Breaking strength at 20 °С, Pa•s, not less than: 420-790
Dropping point, °С, not below than: 250
Colloid stability under load, %, not more than: 6
The content of free alkali in terms of NaOH,%, not more than: —
Penetration at 25 °C, mm, 10-1: 200-220
Evaporation at 150 °C, %, not more than: —