
Caution:
Load sensing control is limited to 5000 psi, 345
bar maximum pressure.
Pump should be connected to speed control valve, load sens-
ing line and load valve as shown.
Close the speed control valve. Check the pressure difference
from outlet pressure to load pressure. Using the differential
adjustment, set this pressure difference to 450 psi ± 25 psi,
31,0 ± 1,72 bar or shop order requirement. Caution: Too low
or too high a setting will cause the control to malfunction.
Install cap on differential adjustment.
Fully open the speed control valve. Set the compensator to
3000 psi, 207 bar, and 5000 psi, 345 bar. (One turn of adjust-
ment equals approximately 2000 psi, 138 bar.) At each condi-
tion, increase the outlet pressure by closing the load valve until
the pump fully de-strokes. At no time should the outlet pres-
sure vary more than 150 psi, 10,3 bar from the compensator
setting. The control should be steady and stable at all condi-
tions.
With pump at full flow and 5000 psi, 345 bar outlet pressure, close speed control valve till flow reduces slightly. Note flow.
Open load valve slowly, to drop outlet pressure toward minimum. Flow shall remain constant within 2 gpm, 7,6 lpm at all
pressures.
Adjust the speed control valve till flow is at a low value. Note flow. Raise and lower outlet pressure by closing and opening
the load valve. Flow shall remain constant within 2 gpm, 7,6 lpm. Proceed to
FINAL PUMP TEST (pg. 75).
67
TEST PROCEDURE
Raise compensator from minimum to maximum outlet pressure. At each condition, increase the outlet pressure until
the pump fully de-strokes. At no time should the outlet pressure vary over 150 psi, 10,3 bar from the compensator set-
ting. The control should be steady and stable at all conditions.
Calculate compensator leakage by subtracting leakage flow at full flow from leakage flow fully compensated.
Compensator leakage: 5 gpm, 18.9 lpm. maximum
Reduce outlet pressure to 150 psi, 10,3 bar below the compensator setting. Pump should return to full displacement.
Repeat two or more times. Compensator settings should be repeatable. Proceed to
FINAL PUMP TEST (pg. 75)
, or
LOAD SENSING TEST (below)
if applicable.
LOAD SENSING TEST
TEST CIRCUIT
LOAD SENSING
modulating valve
port LS
P110
vent V
differential adjustment
compensator adjustment
LOAD SENSING CONTROL
gage “C1”
port LS
P07
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Содержание P07 C-mod
Страница 12: ...PUMP PARTS LISTS 12 Ref Figure 1 Exploded view of pump with pressure compensator control www comoso com ...
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Страница 57: ...PQ HIGH RESPONSE CONTROL 57 PQ CONTROL IN PROCESS OF DEVELOPMENT www comoso com ...
Страница 74: ...74 TEST PROCEDURE PQ CONTROL IN PROCESS OF DEVELOPMENT www comoso com ...