Hypertherm HyPrecision 100D, Instruction Manual

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7 High-Pressure Water
7.1 High-Pressure Water Overview
The high-pressure (HP) water system increases the relatively low-pressure water inlet up to 60,000 psi
(4,137 bar). Maximum flow rates and orifice diameters are provided in the Specifications section of this
manual.
The High-Pressure Assembly consists of the following four (4) major components:
Intensifier
The Intensifier assembly contains three major subsections or cylinders. The center section contains the
hydraulic cylinder and the two (2) outer sections contain the high-pressure ends. The Intensifier
Assembly uses the pumps hydraulic power to reciprocate the center hydraulic piston with a plunger
connected to each side of the piston. The two plungers reciprocate in the high-pressure cylinders to
make the high-pressure water. Each side of the intensifier has one low pressure and one high-pressure
check valve to bring in the inlet water and output high-pressure water.
Bleed-Down Valve
The Bleed-Down Valve Assembly discharges high-pressure water from the pump when the pump is
turned off or when the hydraulic pressure is reduced.
Attenuator
The Attenuator Assembly acts as the accumulator and uses the compressibility of the water to dampen
the output water pressure pulsation caused by the reciprocation of the intensifier.
HP Filter (Optional)
The HP Filter Assembly (optional) is normally located at the pump output or at the upstream end of the
whip for the cutting head.
Instructions are provided that detail the disassembly and reassembly of the hydraulic intensifier and HP
seal maintenance. A detailed description of the inspection and repair for individual HP subassemblies
are provided. HP attenuators are described but no disassembly procedures are included since the
attenuators are not serviceable by the customer.
WARNING
High-pressure water may be stored in the HP plumbing. Water pressure must be
discharged through the bleed-down valve before starting any service or
maintenance.
Stay clear of weep holes when unscrewing HP fittings in case pressurized water is
discharged.
Turn off electrical power and relieve all water and hydraulic pressure prior to
service. Proper lockout/tag-out procedures must always be followed prior to
performing any maintenance.
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