Page 42 - Parker - Hydraulic Motor/Pump

Catalogue HY30-8249/UK Hydraulic motor/pump
Technical information Series F12

Selfpriming speed and required
inlet pressure Inlet pressure F12 Pump
[bar]
Series F12 F12-250-150-125 -110 -90 -80 -60 -40 -30
When operating the F12 as a pump (with L or R valve 2,0
plate) above the selfpriming speed, the inlet must be
pressurized. Increased noise and deteriorating perform- 1,5
ance may otherwise be experienced.
Diagrams 2 and 3 shows required pump inlet pressure
vs. shaft speed. 1,0
The F12 motor (type M valve plate) sometimes operates
as a pump e.g. when used in a propel transmission and 0,5
the vehicle is going downhill.
Minimum required inlet pressure versus shaft speed is
shown in the diagrams. 0
The inlet pressure can be charged by external pump, 0,15 bar vacuum
pressurized reservoir or using BLA Boost unit. -0,5
Find more info about the BLA unit at page 66. 1000 2000 3000 4000 5000
Speed [rpm]
Diagram 2. Min. required pump (F12-L or -R) inlet press.

Inlet pressure F12 Motor
[bar]
F12-250-150-125 -110 -90 -80 -60 -40 -30
2,0

1,5

1,0

0,5

0
0,15 bar vacuum
-0,5
1000 2000 3000 4000
Speed [rpm]

Diagram 3. Min. required motor (F12-M) inlet pressure.

42 Parker Hannifin
Pump and Motor Division
Trollhättan, Sweden