system: for use of another accessory to operate the iL system, refer to the instruction manual
supplied with the accessory.
All of the components of the iL system are fitted inside an enclosure. Panels of the enclosure can
be removed for access to the pump(s) during maintenance.
The components of the iL system are described in Sections 1.3 onwards.
1.2.2
Applications
The iL system is suitable for use on clean and light duty applications, as described in
Section 1.2.1. If you use the iL system to pump gases that will aggressively attack any of the
internal components of the pump(s), this may eventually damage the pump(s), and result in the
leakage of gases from the iL system, or the leakage of air into the iL system; such leaks may
constitute a safety hazard. The iL system has no purge facility in the swept volume, therefore the
iL system must not be used to pump any gases that require dilution to ensure their safety.
Pumped process gases will be contained within the pump gearbox(es). Normal purge
procedures will purge the swept volume(s) of the pump(s), but will not purge the gearbox(es);
each gearbox is effectively a trapped volume.
For this reason:
•
If you use the iL system to pump dangerous gases, you must take special precautions before
you remove the oil filler-plugs: refer to Section 6.1.2.
•
You must not use the iL system in an application where incompatible gases are pumped, one
after the other. If you do, the gases will mix in the gearbox(es).
If you use the iL system on an application for which it is not suitable, you may invalidate your
warranties. If in doubt, contact BOC Edwards who will advise you as to the suitability of the iL
system for any particular application.
1.3
The LCDP dry pump
The LCDP pump is a five-stage, positive displacement rotary pump in which pairs of
intermeshing rotors (of different profiles mounted on common shafts) are held in correct phase
relation by a pair of timing-gears. The timing-gears and the adjacent deep-groove ball-bearings,
are oil lubricated.
1.4
The LCDP gas system (sensor-configured iL systems only)
The LCDP pump in a sensor-configured iL system has a gas system which makes the iL system
suitable for use in light duty processes.
The gas system has supply pipelines and components (such as valves), a Gas Module with a
pressure transducer, a solenoid-valve, and a pipeline which delivers purge nitrogen to the
shaft-seals in the LCDP pump. The shaft-seals purge flow is on whenever the LCDP pump is on.
Refer to Figure 1-2 which shows a schematic diagram of the iL gas system.
1-4
iL Dry Pumping Systems
