Druck PV 411 User Manual
K258 Issue No. 1
Page 14
Pre-filling
Connect the equipment as detailed on page 5.
Turn the selector valve fully clockwise (in) position.
Loosen the reservoir cover lock nut to open the reservoir cover and
let atmospheric pressure into the top of the reservoir.
Open the bleed valve on the UUT.
Carefully operate the scissor-action handles to fill the system. Stop
pumping when fluid comes out of the bleed valve.
Close the bleed valve on the UUT.
If necessary, top-up the reservoir to the 2/3 level with clean fluid.
Secure the reservoir cover by tightening the reservoir cover lock nut.
The pump and connected system is ready for use.
Setting Pressure Relief Valve (Figure 1)
The pressure relief valve (PRV) can be set at pressures from 30 to
700 bar.
If the system pressure exceeds the set pressure, the PRV opens
and vents fluid through the inlet port to the reservoir. When the
pressure decreases, the PRV closes.
To set the PRV, loosen the PRV locking screw
and turn the PRV to release at the required
pressure.
Hold the PRV and turn the collar fully
anti-clockwise.
Tighten the PRV locking screw.
