Keeping the World Flowing
77
18.0 Grease & Hydraulic Oil Specification
In general, there is no need to lubricate the actuator because
its mechanism is lubricated for life. The standard grease for
Rotork Fluid Systems scotch yoke actuators are shown below.
If an alternative was specified and/or supplied, please refer to
the job specific documentation.
18.1 Grease
Lubricate mechanical sliding components of the scotch
yoke actuators using the following grease or equivalent for
temperature range -30° < T < +100 °C.
Manufacturer: Dow Corning Corporation
Trade name:
Colour:
MOLIKOTE
®
P40
Clear Brown
Unworked penetration (ISO 2137):
Viscosity of oil at 40 °C (104°F) (DIN 51 562):
310-350 mm/10
360 mm
2
/s
Service temperature:
Drop point (ISO 2176):
-40 to 230 °C (-40 to 446 °F)
None
Four ball tester
Weld load (Din 51 350 pt.4)
Wear scar under 800N load (Din 51 350 pt.5)
3000 N
0.94 mm
Coefficient of friction
[1]
Screw test - µ thread
Screw test - µ head
0.16
0.08
1. Coefficient of friction in bolted connection, M12x1.75, 8.8, on blackened surface.
Lubricate mechanical sliding components of the scotch
yoke actuators using the following grease or equivalent for
temperature range -60° < T < +100 °C.
Manufacturer: Mobil
Trade name: MOBILTHHEMP
®
SHC100TM
NLGI grade: 2
Colour: Clear brown
Penetration, density, viscosity
Worked penetration at 25 °C (ASTM D 217):
Viscosity of oil at 40 °C (104 °F) (ASTM D445):
280
100 CSt
Temperature
Drop point (ASTM D 2265): >260 °C
Load-carrying capacity, wear protection, service life
Four ball tester (ASTM D 2266)
Weld load (ASTM D 2596)
Corrosion protection (ASTM D6138)
0.4 mm
>200
0
A4 US
US
A4
US
A4
A4 US
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