HARBEN CENTURY, Service Manual

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Flowplant Century Pump Manual
2.2 PUMP MOUNTING
2.2.1 General Details
The Century Series pumps are designed for direct drive and flange mounting. The normal
operating speed is 1000 rpm, nominal. Maximum operating speed is 1200 rpm. The pump
must rotate anticlockwise, looking at the front of the pump ('arrow' cast into crank- case).
The maximum inlet water pressure for the pump is 0.5 bar (5.0 metre head), whilst the
maximum oil pressure for the pump is 4.0 metre head to centre line of pump.
The pump can be inclined between horizontal and 45 degrees (delivery end uppermost).
If further inclination is required, between 45 degrees and vertical, Flowplant Group Ltd
should be contacted at the address given in Section 1.
The weight of a pump with oil in the crankcase, drive coupling fitted and bell housing,
depends on the number of cylinders fitted, as follows:
4 cyl - 160 kg
8 cyl - 205 kg
The engineer should ensure that all couplings are fitted with a 3 mm clearance. Where a
bell housing (pump mounting and coupling shaft and cover) cannot be fitted due to a
difference in spigot or bolt locations, an adaptor ring may be fitted. Refer to Para 9 for
further details of coupling arrangements.
It is recommended that a detailed layout be drawn and the following points considered:
(a) Selection of bell housing most suitable for adaptor ring. Additional machining to
the bell housing may be required.
(b) Sufficient coupling engagement on the shaft whilst maintaining the recommended
clearance.
(c) Clearance between shafts; careful design can eliminate the shortening of
motor/engine shaft.
2.2.2 Pump Fitting
When the pump is to be fitted in position, the following points should be noted:
(a) When the pump is first married up to the prime mover, access is required to check
coupling clearance. When Flender B200 couplings are used, sight/gauge holes
are drilled in the bell housing for this purpose.
(b) It depends on the particular installation whether the pump head is removed to a
workshop for maintenance, e.g. diaphragm or valve replacement or whether work is
carried out in-situ.
(c) Where a pump 'strip-down' is required, the pump should be removed to the
workshop. The use of an assembly stand (part no 100-279) is recommended.
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