GAS COMPRESSORS / BOOSTERS
GAS & AIR MIXING SYSTEMS
AIR BLOWERS & VACUUM PUMPS
The Utile Engineering Co. Ltd.
Irthlingborough, Northamptonshire, NN9 5UG, ENGLAND
Telephone: + 44 (0) 1933 650216 Facsimile: + 44 (0) 1933 652738 Email: [email protected]
www.utileengineering.com
Feb-19
18
IC013 Rev2
Photo A
Photo B
Photo C
Photo D
Photo E
Photo F
Photo G
Photo H
1.
To Dismantle
(see parts list page 20 for item numbers)
1.1
Remove the four dome nuts (34) and pull off the inlet
casing (2) from complete with the inlet flange and
gasket (10) (photo A).
1.2
Grip the drive pulley firmly and remove the lock nut
(22), which has a left-hand thread. Removal of this
will ‘jack off’ the inlet casing bearing (25) fitted to 4
and 5 stage machines only.
1.3
Any interstage casings (9), impellers (12), impeller
hubs (13), and spacing collars (14) can now be
removed (photo B).
1.4
To remove the shaft (3-7) with bearings (23 & 24),
first remove the drive pulley, then undo three screws
(26) to release the end cap (11). Lift out the thrust
washer (21), the shaft can now be pushed towards the
pulley end with bearings attached (photo C).
1.5
To renew the shaft seal (18) first remove circlip (20)
then drive out towards the inner side complete with
the seal ring (16) and o-ring (17).
1.6
Clean the mechanical parts carefully.
2.
To Re–assemble
Proceed as follows:
2.1
Position circlip (20) in volute casing (1) (photo E).
2.2
Fit seal (18) into the volute casing from the inner
side using Loctite 648 on the seal outside diameter,
taking care not to damage the sealing lip, fit with
the spring side facing the impeller. Ensure that the
seal is pressed in approx. 2mm below the inner face
of the volute casing to give clearance for the seal
ring flange (photo D).
2.3
Insert the o-ring (17) into the groove in the seal ring
bore using a little grease, then press the seal ring into
position in the volute casing (photo C) until the bearing
stops against circlip (photo B) and the outer bearing is
just below the face (photo G).
2.5
Ensure the thrust washer (21) is replaced before fitting
end cap (11) (photo H).
2.5
If renewing the shaft seal (19) in end cap (11) press in
flush with outer edge and with tension spring facing
bearing, lightly greasing the seal lip.
2.6
Smear a light coating of Loctite 5922 on the volute and
endcap mating faces only (remove any excess and do
not allow any to get into the bearings). Refit end cap
(11) with gasket (41).
Dismantle
To Re assemble
SYMPTONS
CAUSES
REMEDIES
Overheating/overloading of electric
motor
1. Overloading of motor due to excessive
working pressure.
2. Speed too high.
3. Incorrect voltage
4. Insufficient cooling
1.
Lower working pressure.
2.
Check speed with motor data plate.
3.
Check and correct
4.
Check motor cooling is not restricted
Shaft partially or totally locked
1.
Machine seized.
2.
Faulty bearing
3.
Foreign particles in machine.
1.
Repair machine.
2.
Replace bearing.
3.
Disassemble machine and remove
foreign particles
