FIRSTRECHARGECYCLE The linkage pushes PB2 open, which causes V1, V3, V4, V5 and CR1 to de-energize and the flow pattern illustrated on this drawing is established. The pressurized cushion tank is isolated. The diamond shaped actuator, the displacement cylinder and the depressurization cylinder all experience a common pressure. The depressurization cylinder strokes, which de-pressurizes all three components. This removes the diamond shaped actuator's power advantage over the return springs. The return springs retract to force the fluid in the diamond shaped actuator back into the displacement cylinder. When the common pressure drops below the spring range of the depressurization cylinder, the fluid is forced into the displacement cylinder from the depressurization cylinder. When the 99% of the fluid that came out of the displacement cylinder has been returned to the displacement cylinder, the linkage forces push button (PB3) to close which energizes V2. H L S H L S NOTE; THE POWER DIFFERENTIAL OUTPUT INCREASES WITH INCREASED PRESSURE 120V 24V CUSHION TANK ENERGIZED DE-ENERGIZED PRV VALVE HIGH PRESSURE AIR DE-PRESSURIZATION ACTUATOR 3# TO 7# V3 V4 V5 C C NC NC NO NO NO NC V1 V2 C NC NO PB3 PB2 CR1 PRESSURE TRANSMITTER TO LOGGER PRESSURE TRANSMITTER DISPLACEMENT ACTUATOR VALVE PB1 LINKAGE RETURN SPRING RETURN SPRING DIAMOND- SHAPED ACTUATOR CR1 1 2 4 PB1 2 V1 4 2 V3 4 2 V4 4 2 V5 4 3 V2 4 CR1-1 PB2 1 5 5 2 1 3 PB3 NOTE; PB1, PB2 AND PB3 ARE MOMENTARY PUSH BUTTONS. PB2 IS NORMALLY CLOSED. PB1 AND PB3 ARE NORMALLY OPEN. 13.296
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