Parker K Series, Техническое руководство

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11 - PVD 3674_GB_K Series_CE-November 2016.Docx
3.
TECHNICAL DATA
3.1. Kit selection
3.1.1. Altitude derating
From 0 to 1000 m : no derating
1000 to 4000 m: torque derating of 10% for each step of 1000 m for air cooled
3.1.2. Temperature derating
The maximal temperature for natural cooling is 40°C. But, it is possible to increase a
little bit the ambient temperature above 40°C, with a torque reduction. The following
formula gives an indicative about the torque derating at low speed. But in any case
refer to PARKER technical department to know the exact values.
At low speed the torque derating is given by the following formula for an ambient
temperature > 40°C.
C
C e temperatur Ambient C
derating Torque

  

105
) _ 145 (
* 100 [%] _
At high speed, the calculation is more complex, and the derating is
much more important.
Please refer to PARKER to know the precise data of torque derating
according to ambient temperature at high speed for a specific kit
.