Baker Hughes Druck PV411, Инструкция по эксплуатации

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Copyright 2000 Baker Hughes Company.
English–PV 411A Instruction Manual | 3
3.2 Generating Pneumatic Pressure and
Vacuum (Figure A1)
Connect the pump as detailed in “Connecting the Pump” on
page 2.
Note: Compressing a gas generates heat. Gas heated or
cooled in an enclosed volume causes a pressure change.
It is important to allow enough time for the heated gas to
cool and the pressure to stabilize.
The pumping required to generate a pressure depends on
the volume of the system. Therefore, keep the system
volume to a minimum.
3.2.1 Pressure
1. Turn the selector valve (7) fully clockwise (in) position.
2. Operate the scissor-action handles (5) to generate the
approximate pressure, allow time for thermal
stabilization.
3. If necessary, use the volume adjuster (3) to adjust the
required pressure.
4. After attaining the required pressure operate the
scissor-action handles (5) to generate a higher
pressure. Alternatively, vent the pressure to
atmosphere by slowly turning (counterclockwise) the
selector valve (7) to the center position.
5. After completion, depressurize the pump and
disconnect from the pipes and equipment.
3.2.2 Vacuum
1. Turn the selector valve (7) fully counterclockwise (out)
position.
2. Operate the scissor-action handles (5) to generate the
approximate vacuum, allow time for thermal
stabilization.
3. If necessary, use the volume adjuster (3) to adjust the
required vacuum.
4. After attaining the required vacuum operate the
scissor-action handles (5) to generate a higher
vacuum. Alternatively, vent atmosphere into the
vacuum by slowly turning (counterclockwise) the
selector valve (7) to the center position.
5. After completion, depressurize the pump and
disconnect from the pipes and equipment.
4. Hydraulic Operation
Note: Wherever possible, use o-ring seals in the BSP
connection ports, this is the recommended method of
sealing.
Key to Figure A2
1. Reservoir cover lock nut
2. Reservoir cover
3. O-ring
4. Bleed hole
4.1 Fluid Reservoir (Figure A2)
The main body of the reservoir is transparent acrylic
providing a clear view of the contents.
The reservoir can be removed from the pump without the
need to empty the fluid, a self-sealing connection prevents
leakage. The spring-loaded reservoir cover (2) seals under
atmospheric pressure conditions, but vents excess internal
pressure harmlessly in the event of inadvertent
pressurization.
The reservoir, connects to the inlet port on the top of the
pump and supplies fluid to the pump system for pressure
generation.
In vacuum mode, used in priming, the fluid flow is reversed,
fluid is drawn from the two outlet ports and through to the
inlet port and the reservoir.
4.2 Fitting
Make sure that the correct o-ring seal (3) is fitted to the inlet
port to prevent leakage. Screw the reservoir (clockwise)
into the inlet port marked RESERVOIR.
Note: Demineralized water is used to test the pump at
manufacture. On shipment, there will be traces of
demineralized water in the system.
4.3 Filling
1. Unscrew the reservoir cover lock nut (1) and remove
the reservoir cover (2).
2. Using clean, recommended fluid fill the reservoir to
approximately 2/3 full.
3. Refit the reservoir cover and re-tighten the reservoir
cover lock nut (1).
4. Connect the required pipes and equipment to the outlet
ports.
4.4 Priming the System
There are two methods: vacuum priming to extract the air
or pre-filling the system.
Note: If air remains in the system, full pressure cannot be
achieved as the air in the fluid compresses. Air must be
removed from the system fluid.
Both priming methods require the pump to be held in the
vertical position to keep the reservoir bleed hole (4) in fluid.
Do not allow air to enter the system through this bleed hole
(4).
4.4.1 Vacuum Priming (Figure A2)
1. Connect the equipment as detailed in “Operation” on
page 2.
2. Air can be removed using the vacuum facility on the
pump.
Note: This method should not be used with vacuum-
sensitive equipment.
3. Turn selector valve fully out, counterclockwise
(vacuum) position.
4. Turn the volume adjuster valve fully counterclockwise
(out) position.
5. Pump until bubbles stop appearing in the reservoir,
(this generates a vacuum in the system).
6. Turn the selector valve fully in, (this action releases the
vacuum and rapidly fills the system with fluid from the
reservoir). It is advisable to generate a small hydraulic
pressure, then release this pressure and repeat the
WARNING
Observe all safety precautions
and procedures stated in local orders.
CAUTION
Do not mix hydraulic fluids.
Only use compatible fluids, refer to the
specification.
Only fit appropriate seals on pressure
connections.
Damage can be caused if equipment
connected to this pump is contaminated.
Avoid particulate contamination.
After use, the pump should be considered
contaminated with hydraulic fluid.