SPP Pumps Unistream - Manual (Page 9)

Operators Instructions for
Unistream Centrifugal Pumps
Manual No/Rev
W21-002E / 10
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 9 of 24
signal can still be heard with ear defenders
worn.
Hazardous Gases, Mists, Sprays
and Leaks
Be aware of the hazards relating to
the pumped fluid, especially the danger from
inhalation of noxious and toxic gases, skin
and eye contact or penetration. Obtain and
understand
the hazardous substance
(COSHH) data sheets relating to the
pumped fluid and note the recommended
emergency and first aid procedures.
Periodic Checks:
a) Stuffing Box:
Check that there is sufficient leakage to
lubricate and cool the packing, between 30
and 120 drops per minute is required. Check
also that the drain pipes are clear of
obstruction.
b) Bearings:
Check the bearing temperatures do not
exceed 70°C as an increase may indicate
the early stages of bearing trouble.
c) Noise:
Listen for any unusual noise or an increase
in normal sound level.
This may result from:
i)
Loose fasteners for guards and other
equipment.
ii) Worn coupling.
iii) Air trapped in the pump i.e. the pump
was not fully primed.
iv) Cavitation caused by air in the liquid
from leaks in the suction pipework.
v) Small solids in the liquid.
NOTE - At certain installations or at certain
operation points on the pump curve, the
noise level 70dB (or the actual pump
specified noise level) can be exceeded.
d) Alignment:
Alignment should be checked after the first
run and after any maintenance requiring
removal or disconnection of the coupling.
For detailed instructions, refer to Section 4.5
- Shaft Alignment
e) Suction Gauge Reading:
If this is higher than normal, investigate and
check that valves in the suction pipework are
fully open or that the suction lift may have
increased.
f) Discharge Gauge Reading:
If this is lower than normal, check for a leak
in the associated pipework or that a valve in
the delivery line has been opened when
normally it is partially closed.
5.3 Stopping Procedure
Stop the motor then fully close the discharge
valve.
6. Maintenance and Service
6.1 General Introduction
SPP Pumps Ltd Unistream pumps will
provide many years of trouble free service
when maintained in accordance with these
instructions. In the event of failure of the
pump it is recommended that SPP Pumps
Ltd. Service Department is called to
investigate and carry out repairs. The
following instructions are given to cover the
main elements of strip and rebuild but do
NOT include instructions for work that MUST
be done by an SPP Pumps Ltd. Service
Engineer.
Recommended Maintenance Schedule
Period: Maintenance Required:
Weekly Carry out periodic checks as shown in
Section 5.3 and take corrective action
as shown in Section 7.
After First
200 Hours
Running Replace the Lubricating Oil as shown in
Section 6.4.
Half Yearly
or After
5000
Hours
Running Replace the Lubricating Oil as shown in
Section 6.4.
Check the alignment of pump and motor
and adjust, as shown in Section 4.5.
Check and tighten all holding down bolts
if found loose, refer to Section 9 for
recommended bolt tightening torques.
For soft packed pumps, check the gland
adjustment remaining and replace
packing if necessary. At the same time,
check the sleeve for scoring and replace
if necessary.
Check the coupling for wear as per
manufacturers instructions.
Each Year Assess the performance of the pump
against the duty specifications and take
corrective action as shown in Section 7
The following hazards may arise during
maintenance work:
Fluid Pressure Jet Hazards
Check and ensure that the pump
operates at below the Maximum
Working Pressure specified in the manual or
on the pump nameplate and before
maintenance, ensure that the pump is