BOC Edwards 18B4B, Инструкция по эксплуатации, Страница: 23 / 62

Feb 04 Issue A
18B4B Vapour Booster Pumps
PAGE
17
17
IN
STALLATION
3.3.3 Free-standing installation
Note: The centre of mass of the pump on its pallet is
not at the centre of the pallet itself.
1. Use a wide-track pallet truck or fork-lift to
carefully and slowly move the pump (on its
pallet) close to its required operating location.
Ensure that the pump does not topple when
you move it.
2. Undo and remove the bolts, nuts and washers
(fitted through the fixing holes: Figure 3, items
13) which secure the pump to the pallet. Retain
the bolts, nuts and washers for future use (for
example, if you need to move the pump for
maintenance).
3. Attach suitable slings to the pump under the
inlet flange (Figure 1, item 1), then attach
suitable lifting equipment (such as a crane or
hoist) to the slings.
4. Use the lifting equipment to lift the pump from
its pallet. Retain the pallet for future use.
5. Ensure that the foam heater support remains
attached to the pallet. If necessary, remove the
heater support from the pump.
6. Use the lifting equipment to move the pump
close to its required operating location, then
carefully lower the pump into its operating
location. Take care not to damage the terminal
box when you lower the pump.
7. Disconnect the lifting equipment from the
pump.
8. Fix suitable bolts through the fixing holes
(Figure 3, item 13) on each of the three
mounting feet to secure the pump in position.
3.4 Vacuum connections
3.4.1 System design
Consider the following points when you design your
system:
• On all applications, you must fit a pressure
interlock to the backing pipeline to switch off
the electrical supply to the pump heaters if
the pressure in the pipeline rises to the critical
backing pressure. If you do not fit a pressure
interlock and the pressure in the backing
pipeline rises to the critical backing pressure,
fluid will backstream into the vacuum system
and thermal breakdown of the pump fluid may
occur (refer to Section 3.11.1). Note that if
you have a suitable backing pressure gauge,
you may be able to use the gauge to provide
the necessary pressure signal for the pressure
interlock.
• Connecting pipelines should be as short as
possible and have the largest possible
diameter.
• You must be able to isolate the pump inlet and
outlet from the atmosphere and from your
vacuum system.
• You must be able to vent the pump to
atmosphere through the backing pipeline or
the pump inlet. (You must not vent the pump
through the boiler).
• Incorporate flexible pipelines in the backing
pipeline to reduce the transmission of
vibration and to prevent loading of coupling
joints. If you use flexible pipelines, you must
ensure that you use pipelines which have a
maximum pressure rating which is greater
than the highest pressure that can be
generated in your system. We recommend
that you use BOC Edwards flexible pipelines.
(Continued on page 18)
WARNING
You must fit a backing pressure-
interlock.