Oil Types / Operating Fluids; Viscosity And Temperature For H1B Motors - Danfoss H1B060 User Manual

User Manual
ATEX H1 Bent Axis Variable Displacement Motors
Technical information

Oil types / Operating fluids

8 | © Danfoss | August 2021
Location to attach temperature sensor
In a hydraulic system the most important task of the oil is to transfer energy. At the same time the oil
must lubricate moving parts in hydraulic components, protect them from corrosion, and transport dirt
particles and heat out of the system. To ensure that hydraulic components operate without problems
and have long operating life it is therefore vital to select the correct oil type with the necessary additives.
Ratings and performance data are based on operating with hydraulic fluids containing oxidation, rust
and foam inhibitors. These fluids must possess good thermal and hydrolytic stability to prevent wear,
erosion and corrosion of motors components.
W
Warning
It is compulsory to use oils whose inflammable degree is at least 50K above the maximum surface
temperature of the pump. Maximum surface temperature for Group IIG and IID can be found under

Viscosity and temperature for H1B motors

Viscosity and temperature for H1B motors
Features
Viscosity
Temperature
1)
Intermittent = Short term t < 3 min per incident.
2)
Cold start = Short term t < 3 min; p ≥ 50 bar; n ≤ 1000 min
especially when the temperature is below -25 °C [-13 °F].
3)
Must not be exceeded locally either (e.g. in the bearing area) . The temperature in the bearing area is (depending
on pressure and speed ) up to 5 °C [41 °F] higher than the average case drain temperature.
Above maximum surface temperatures are without any deposited dust on the product. The possible
insulation effect of a dust layer on the surface has to be taken into account by the safety margin to the
minimum ignition temperature of the dust concerned. For up to 5 mm [1.97 in] layer thickness the safety
margin is 75°C [167°F]. For further information please see IEC 60079-14.
W
Warning
The above operating temperatures (ambient and oil) of the motors must be guaranteed by the end user.
on page 8.
1)
Intermittent
Minimum
Recommended range
2)
Maximum (cold start)
2)
Minimum (cold start)
1)
Maximum intermittent
-1
(rpm); please contact Danfoss Power Solutions
Data
2
5 mm /sec [42 SUS]
2
7 mm /sec [49 SUS]
2
12 - 80 mm [66 - 371 SUS]
2
1600 mm /sec [7416 SUS]
-40°C [-40°F]
3)
115°C [239°F]
BC382476021584en-000102