Dover Blackmer TLGLF3C Istruzioni per l'installazione, il funzionamento e la manutenzione - Pagina 4
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PUMP DRIVE
The pump may be driven by a power take-off through
universal joints. When using universal joints, a splined slip
joint, properly lubricated, must be used on the connecting jack
shaft to prevent end thrust on the pump shaft. It is very
important to install a proper drive line to avoid excessive
wear, vibration and noise (see Fig. 3 and Table 2).
General guidelines to follow for proper pump drive:
1.
Do not use square slip joints.
2.
Use the least number of jack shafts as is practical.
3.
Use an even number of universal joints.
4.
The pump shaft and power take-off shaft must be parallel
in all respects. Use an angular level measuring device to
ensure the PTO and pump shaft are parallel to each
other. If necessary, the pump can be shimmed to correct
any misalignment. The PTO shaft coming off at the trans-
mission does not need to be perfectly horizontal as long
as the pump is shimmed to have its shaft parallel in all
respects to the PTO shaft.
5.
The yokes of the universals at both ends of the jack shaft
must be parallel and in phase.
6.
The maximum recommended angle between the jack
shaft and the pump shaft is 15 degrees. See Table 2.
Failure to follow any of these guidelines may result in a gallop
or uneven turning of the pump rotor, which will in turn cause a
surging vibration to the liquid stream and piping system.
Contact the supplier of the drive line components for specific
design assistance.
A drive shaft guard between the pto and
pump must be provided to prevent
personal injury, property damage, or
death.
Do not operate
without guard
in place
Note: A Drive Shaft Guard between the pump and the PTO
MUST be provided. (Not Shown)
Figure 3 – Pump Drive
Angle of Drive Shaft
1° through 5°
6° through 10°
Very good
INSTALLATION
11° through 15°
Good
Fair
Table 2
HYDRAULIC DRIVE
LGLD truck mounted pumps may also be driven hydraulically.
Hydraulic motors should be well supported with their shafts
parallel to the pump shaft in all respects. Blackmer provides
an optional close-coupled hydraulic motor adapter. The
adapter provides for straight alignment of a hydraulic motor
drive through a solid coupling connected to a straight key
pump shaft. This coupling connection requires grease
lubrication every three months at minimum. Refer to the
"Lubrication" section of this manual.
Do not operate
without guard
in place
PUMP RELIEF VALVE AND BYPASS 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, and any necessary piping, back to the tank. DO NOT
pipe the bypass valve back to the intake line. The setting on
the external bypass valve must be at least 25 psi (1.7 bar)
lower than the pump internal relief valve setting. The valve
and piping must be of adequate size to accommodate the full
flow from the pump when the discharge line is closed. The
non-adjustable pump internal relief valve is factory set at
approximately 150 PSI (10.3 bar).
Refer to Blackmer Bypass Valve Installation and Maintenance
Instructions for bypass valve settings and adjustments.
PUMP ROTATION
Confirm correct pump rotation by checking the pump
rotation arrows respective to pump driver rotation.
To Change Pump Rotation:
Blackmer TLGLF3C pump models are equipped with a double
ended rotor and shaft, enabling them to be driven from either
shaft end. To change rotation, rotate the pump 180 degrees
so that the opposite shaft becomes the driven shaft. The
shaft protector (186) MUST be mounted over the non-driven
shaft.
Do not operate
without guard
in place
501-D00
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Operation without shaft protector can
cause serious personal injury, major
property damage, or death.
NOTICE:
NOTICE:
Operation without guards in place can
cause serious personal injury, major
property damage, or death.