38 HyPrecision 50S/60S/75S Operator Manual 808690
2 – Product description
Product description
Pressure compensator
The pressure compensator controls water pressure by limiting the minimum and maximum hydraulic fluid pressure
to the intensifier.
The compensating valve limits the maximum pump pressure. The differential pressure valve limits the minimum
hydraulic pressure.
Cooling loop
Compressing hydraulic fluid generates substantial heat that can damage equipment and decrease the life of the
fluid. The cooling loop keeps the hydraulic fluid at its optimum temperature. The heat exchanger, gear pump,
hydraulic fluid, filter, and low-pressure cooling water or an external air cooler make up a cooling loop.
Water-cooled heat exchanger (standard)
When the primary motor is running, low-pressure supply water or water from a chiller circulates through a heat
exchanger. Water from the heat exchanger goes to a drain or returns to the chiller.
A water-modulating valve is standard in systems without a chiller. This valve adjusts the flow rate of water based
on the temperature of the hydraulic fluid.
External air cooler (optional)
The gear pump directs hydraulic fluid to an external air cooler, which uses a fan to cool the fluid.
When the hydraulic fluid temperature in the tank is higher than 55°C (130°F), a fan forces ambient air over
cooling fins to cool the hydraulic fluid. The fan runs for at least 10 minutes. If the hydraulic fluid temperature is
lower than 45°C (113°F) after 10 minutes, the fan turns off. If the hydraulic fluid temperature is higher
than 45°C (113°F) after 10 minutes, the fan continues running.
Hydraulic fluid from the air cooler goes through a filter and then returns to the hydraulic fluid tank.
1 Compensating valve 2 Differential pressure valve
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