20425618
5-2005/Rev 0
8-1
SECTION 8
HIGH PRESSURE WATER SYSTEM
8.1 Overview
The high pressure water system is supported by both the cutting water supply circuit and the
hydraulic circuit. Cutting water of sufficient flow and pressure is routed from the cutting water
supply circuit to the intensifier where it is pressurized up to 60,000 psi (4,137 bar) and delivered
to the cutting head.
The directional control valve in the hydraulic system creates the stroking action of the intensifier
by sending pressurized hydraulic oil to one side of the hydraulic cylinder or the other. As the
flow is sent to one side, hydraulic fluid is returned to the reservoir from the opposite side.
System components include a double-ended hydraulic cylinder; reciprocating piston assembly;
high pressure cylinders attached to each end of the hydraulic cylinder; two plungers, sealing
heads and hard seal end caps; and a one liter capacity attenuator. Sophisticated check valves and
seal assemblies ensure hydraulic oil, and the low pressure and high pressure water travel in the
appropriate direction.
8.2 Optional System Components
The optional high pressure dump valve instantly releases high pressure from the system and is
available at the time of purchase, or as upgrade kit for existing equipment.
8.3 Operation
The directional control valve sends pressurized hydraulic oil to one side of the hydraulic cylinder.
The pressurized oil pushes against the piston, moving it in one direction until it activates the
proximity switch at the end of the stroke. The hydraulic flow is then sent to the opposite side of
the cylinder, and the piston reverses direction until it activates the proximity switch at the
opposite end of the stroke.
The green light on the proximity switch indicates there is power to the switch. The red light
illuminates when the switch is activated. The proximity switches are magnetically activated by
the presence of the metallic surface of the piston. When the switch is activated, the flow of the
directional control valve is changed and the direction is reversed.
As the pressurized oil pushes the piston in one direction, the plunger on that end extends and
pushes against the water in the high pressure cylinder, increasing the pressure up to 60,000 psi
(4,137 bar). When the piston reverses direction, the plunger retracts and the plunger in the
opposite cylinder extends to deliver the high pressure water.
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