Dover Ebsray R75 Handleiding voor installatie, bediening en onderhoud - Pagina 4
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4. Check alignment of pipes to pump to avoid strains which
might later cause misalignment. See Figure 1. Unbolt
flanges or break union joints. Pipes should not spring away
or drop down. After pump has been in operation for a one
to two weeks, completely recheck alignment.
Figure 1:
Pipe alignment
Pumps with welded connections contain non-metallic O-
ring seals that will be damaged if welding is done with
these O-rings installed.
Prior to welding the piping, remove the O-rings from under the
alternate inlet flange and discharge flange. After the welding is
complete, reinstall the lubricated O-rings into the cleaned O-
ring grooves.
Ebsray recommends that the pump and its inlet pipework are
painted white.
3.5
ALTERNATE INLET
The alternate inlet port can be used as a fill connection for
bottom loading of the tank by stationary pumps at the terminal
or bulk plant. It can also be used as an alternate pump inlet,
allowing the pump to unload another tank in an emergency.
To minimize vapor formation, the alternate inlet line must be as
large in diameter as the inlet port (DN50) and as short as
possible. The line must be connected through a suitable
strainer using a minimum 40 mesh strainer screen.
3.6
PRE-INSTALLATION CLEANING
New pumps contain residual test fluid and rust inhibitor. If
necessary, flush pump prior to use.
The supply tank and intake piping MUST be cleaned and
flushed prior to pump installation and operation.
3.7
PUMP ROTATION
Confirm pump rotation by checking the pump rotation
arrows respective to pump driver rotation.
The pump rotation is always clockwise looking from the shaft
end. See SECTION 5.7 for instructions for re-handing the
pump.
3.8
HYDRAULIC DRIVE
R75 truck mounted pumps are designed to be hydraulically
driven and PTO driven. Hydraulic motors should be well
supported with their shafts parallel to the pump shaft in all
respects.
Ebsray provides an optional close-coupled hydraulic motor
adapter. The adapter provides for straight alignment of a
hydraulic motor drive through a coupling connected to a
straight key pump shaft.
NOTE:
NOTE:
NOTE:
3.9
PUMP INTERNAL RELIEF VALVE
The pump internal relief valve is designed to protect the
pump from excessive pressure and must not be used as a
system pressure control valve.
For ALL liquefied gas applications, install an external bypass
valve which must have a free and clear passage back to the
tank.
External Bypass Valves are integral to the performance and
operation of liquefied gas pumps and control the maximum
operating differential pressure of the system.
DO NOT pipe the bypass valve back into the pumps inlet line.
The setting on the external bypass valve must not exceed
1400 kPa (14 Bar). The pumps non-adjustable internal relief
valve is factory set to 1450 kPa (14.5 bar)
3.10
COUPLING ALIGNMENT
To maximise the life of the pump appropriate alignment of the
coupled shafts is a fundamental requirement of any coupling
installation. If pump was supplied by Ebsray as part of a pumpset
unit, pump and driver have been accurately aligned at factory.
To ensure that alignment has been maintained during transit and
installation, alignment MUST BE CHECKED upon final
installation and prior to startup.
Ensure 'distance between shaft ends' (DBSE) is correct for the
type of coupling utilised.
Angular misalignment
As shown in Figure
2 where shafts are
at an angle to one
another should be
corrected
before
parallel
misalignment.
Parallel misalignment
As shown in Figure 3
where shafts are in line
angularly and parallel to
each other but are offset
can now be corrected.
Horizontal adjustment by use of shims under the driver (or
pump) will effectively correct error in the vertical plane.
4
NOTE:
Figure 2
Figure 3