Mart Cyclone 30 Series, Installation, Operation And Maintenance Manual, Page: 245 / 322

7 - 66 Installation, Operations, and Maintenance Manual
The MART Corporation Standard Turntable Power Washer v.
4
.0
13. Pump Pressure Control Valve and
Gauge
The optional pump pressure control valve allows the operator to adjust water flow and
pressure to the power blast manifold (PBM). The pressure gauge indicates the amount
of pressure.
13.1. Theory of Operation
The operator turns the control valve clockwise to close it, decreasing water flow to the
PBM. The reduced flow results in lower pressure through the PBM nozzles. The valve
will not slip, so pressure remains exactly as adjusted.
NOTE : When the control valve is fully closed, the water line still
carries the minimum water flow necessary to avoid damage to the
pump.
A coupling welded into piping between the pump and the PBM is used as a pressure tap
point for a glycerin-filled pressure gauge. The pressure tap piping is a large diameter
for easy clean out.
The pressure gauge assembly includes a diaphragm seal that prevents solution from
entering the gauge. Pressure on the diaphragm is transmitted through the glycerin
inside the gauge to the reading dial.
13.2. Installation
This option arrives factory-installed.
13.3. Operations
While the wash pump is running, turn the control valve until the pressure you wish is
indicated on the pressure gauge.