SPP Pumps Unistream User Manual
Page 10
Manual No/Rev
W21-002E / 10
Operators Instructions for
Unistream Centrifugal Pumps
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 10 of 24
drained down.
Hazardous Materials
Wear a suitable mask or respirator
when working with Packing and
Gasket components that contain
fibrous material, as these can be hazardous
when the fibrous dust is inhaled. Be
cautious, if other supplier's components
have been substituted for genuine SPP
Pumps Ltd parts, these may then contain
hazardous materials.
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.
BEFORE ATTEMPTING ANY MAINTENANCE ON
A PUMP, PARTICULARLY IF IT HAS BEEN
HANDLING ANY FORM OF HAZARDOUS
LIQUID, ENSURE THAT THE UNIT IS SAFE TO
WORK ON. THE PUMP MUST BE FLUSHED
THOROUGHLY WITH A SUITABLE CLEANSER
TO PURGE AWAY ANY OF THE PRODUCT
LEFT IN THE PUMP COMPONENTS. THIS
SHOULD BE CARRIED OUT BY THE PLANT
OPERATOR
AND
A
CERTIFICATE
OF
CLEANLINESS OBTAINED BEFORE STARTING
WORK. TO AVOID ANY RISK TO HEALTH IT IS
ALSO ADVISABLE TO WEAR PROTECTIVE
CLOTHING AS RECOMMENDED BY THE SITE
SAFETY
OFFICER,
ESPECIALLY
WHEN
REMOVING OLD PACKING THAT MAY BE
CONTAMINATED.
6.2 Preparation for Maintenance
Electric Shock & Accidental
Starting Hazard
ISOLATE the equipment before
any maintenance work is done.
Switch off the mains supply, remove fuses,
apply lockouts where applicable and affix
suitable isolation warning signs to prevent
inadvertent re-connection.
In order to avoid the possibility of
maintenance personnel inhaling dangerous
fumes or vapours. It is recommended that
maintenance work be carried out away from
the pump location by removal of the bearing
housing and shaft assembly to a suitable
maintenance area.
No special tools are required for dismantling
and re-assembling, however, it is important
to ensure the suitable lifting equipment is
available and that the work is carried out in a
clean area.
6.3 Re-packing the Stuffing Box
Where a soft packed gland is fitted, it will be
necessary to replace the packing periodically
when the gland can no longer be tightened
to reduce leakage to the normal level, or if
the gland suffers from overheating.
6.3.1 Removal and Preparation
Close the suction & discharge valves and
release pressure from the casing.
Remove the gland (45.2), use an extractor
tool to remove packing rings and remove the
lantern ring without damaging the sleeve or
stuffing box bore.
PACKREM1.CDR
PACKING REMOVAL TOOL
Clean the sleeve and bore of the stuffing box
with a clean oily cloth, also clean the lantern
ring.
6.3.2 Packing Preparation
Packing Ring Dimensions (mm)
Pump Size
Shaft
Unit
32/13
32/16
32/20
32/26
40/13
40/16
40/20
40/26
50/13
50/16
50/20
50/26
65/13
65/16
65/20
80/16
25
65/26
65/32
80/20
80/26
80/32
100/20
100/261
00/32
125/26
35
100/40
125/32
125/40
150/32
15040
45
Packing Ring Dimensions (mm)
Shaft Unit
25
35
45
Sleeve Dia. (Minus 0.1mm)
32
40
55
Box Dia. (Plus 0.1mm)
48
60
75
Length of Box
50
63
63
Cross Section of Packing
8 x 8
10 x 10 10 x 10
Length per Ring
125
156
203
Number Required with
4
4
4