HyPrecision 50S/60S/75S Operator Manual 808690 39
2 – Product description
Product description
Low-pressure water system
The low-pressure water system includes the supply water. In water-cooled systems it also includes a cooling
water loop and a heat exchanger.
Low-pressure water
Water coming in to the pump (CUTTING WATER IN) flows through a 1-way check valve into the boost pump to
increase water pressure. From the boost pump, the water passes through 3 filters to remove contaminants. Water
pressure gauges show the pressure before and after water goes through the filters. A switch after the filters tells
the controller if the water pressure is higher than the minimum required. Filtered water collects in the accumulator
tank, which equalizes the water pressure. The water enters the high-pressure ends in the intensifier, which
compresses the water to make high-pressure water for piercing or cutting (CUTTING WATER OUT).
Boost pump
Because supply water is usually at a low pressure, a boost pump is used to increase the water pressure
to 7.85 bar or 758.42 kPa (110 psi). A sustained pressure of less than 2.76 bar or 275.79 kPa (40 psi) causes
the pump to turn off.
The boost pump assembly includes a pump, a 1-way check valve, and a bypass relief valve that affect the water
pressure coming from the boost pump.
The operator interface protects the boost pump from overheating by turning the boost pump ON only when
cutting water is needed and when the water pressure is less than the low-pressure switch setpoint.
The boost pump motor starter has an integrated starter and a thermal overload device. The overload setting is set
at the factory and should not require adjustment.
Cooling water (for water-cooled systems)
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.
The water-modulating valve adjusts the cooling water flow rate automatically to control the temperature of the
hydraulic fluid.
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