Section 8
High Pressure Water System
20425618
5-2005/Rev 0
8-3
The intensifier is a reciprocating pump. As the piston and plungers move from one side to the
other, high pressure water exits one side of the intensifier as low pressure water fills the opposite
side.
The high pressure water is then routed to the attenuator. The attenuator acts as a shock absorber
to dampen pressure fluctuations and ensure a steady and consistent supply of water. From the
attenuator, the high pressure water exits to the cutting head.
High Pressure Dump Valve
The optional high pressure dump valve releases the stored pressure in the intensifier and high
pressure delivery lines. The high pressure dump valve assembly includes a normally open high
pressure water valve and an electrically controlled air valve.
The normally open pneumatic dump valve is held closed by air pressure. When the air supply is
interrupted and exhausted, the valve opens and allows water to flow through the valve. Pressure
is released in the intensifier and the high pressure water stream exits through the drain.
Redundant Models
On redundant models, the cutting water supply lines are manually connected to the inlet water
ports on the active intensifier. Manual hydraulic valves are opened or closed to direct the
hydraulic flow to the active intensifier. Manual high pressure water valves are also opened or
closed to direct the high pressure water flow from the active intensifier.
When a machine is equipped with redundant intensifiers, operation can continue on
the secondary unit if the primary unit requires maintenance. However,
maintenance must not be performed while the machine is in operation.
Maintenance must never be performed on any high pressure components while the
machine is operating. All pressure must be relieved or blocked from the hydraulic
and high pressure circuits and the main control power must be locked out before
performing maintenance.
The following example describes the procedure for changing from one intensifier to the other. In
this example, intensifier 2 will become the active intensifier and intensifier 1 will become
inactive.
1. Make sure the main control power is off.
2. Disconnect the low pressure water supply lines from intensifier 1 and connect them to
intensifier 2.
3. Close the two hydraulic shutoff valves to intensifier 1.
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