Generating Hydraulic Pressure; Setting Pressure Relief Valve - GE Druck PV 411A Manuel D'utilisation

GE Druck PV 411A User Manual

Generating Hydraulic Pressure

Note: Pressurizing a fluid generates heat. A fluid heated or cooled in an
enclosed volume causes a pressure change. Allow enough time to
thermally stabilize.
If necessary, set the PRV see following section.
Open the selector valve (7) anti-clockwise 1 turn.
Screw the volume adjuster (3) fully out (anti-clockwise).
Close the selector valve (7).
Use the scissor-action handles (5) to generate the initial pressure.
Then turn the volume adjuster (3) clockwise to generate the required
pressure, allow time for thermal stabilization.
To reduce the pressure, turn the volume adjuster (3) out (anti-clockwise) to
the required pressure.
After completion, turn the volume adjuster (3) fully out (anti-clockwise) and
turn the selector valve (7) to depressurize the pump. Disconnect from the
pipes and equipment.

Setting Pressure Relief Valve

The pressure relief valve (PRV) can be set at pressures from 30 to 700 bar.
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If the system pressure exceeds the set pressure, the PRV opens and vents
fluid through the inlet port to the reservoir. When the system pressure
decreases below the set pressure, the PRV closes.
1 PRV locking screw (quantity 2)
2 PRV lock nut (with left-hand thread)
3 PRV adjusting nut (with left-hand thread)
To set the PRV:
1. Connect a suitable pressure indicator to either outlet port
Fit a blank to the unused port.
2. Increase pressure until the relief valve operates.
3. Loosen the two PRV locking screws (1).
4. Loosen the PRV lock nut (2) by turning clockwise.
5. Set the relief pressure by turning the PRV adjusting nut (3).
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700 B T C D
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PV411A.
Key to
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(2) or (6).
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