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Accumulator senses

The accumulator sense, pump unload pilot valve is used to sense pressure in an accumulator at port 1 of the valve and when the pressure at port 1 reaches the valve setting, port 2 connects to port 3 to vent a relief valve and unload the pump. Can also be used to Control flow priority valves . This valve has a % ratio between unload setting and reset; when pressure at port 1 falls below % of the valve setting, port 2 is blocked from port 3 and the pump will come back online to recharge the accumulator.

Symbol
Function
Description
Model

3D

Cavity
Nominal capacity
3 port
Accumulator sense, pump unload, pilot valve

QPAA

CAD
T-11A
15% 46 in3/min (0,75lpm)

QPAB

CAD
T-11A
20% 46 in3/min (0,75lpm)

QPAC

CAD
T-11A
30% 46 in3/min (0,75lpm)

QPAD

CAD
T-11A
50% 46 in3/min (0,75lpm)
4 port
Accumulator sense, pump unload, pilot valve, with check

QCDA

CAD
T-21A
15% 12gpm (45lpm)

QCDB

CAD
T-21A
20% 15gpm (60lpm)

QCDC

CAD
T-21A
30% 15gpm (60lpm)

QCDD

CAD
T-21A
50% 15gpm (60lpm)