____________________________________________________________________________________
DESMI Pumping Technology A/S
8
Tagholm 1
9400 Nørresundby
–
Denmark
Tel: +45 96 32 81 11 Fax: +45 98 17 54 99
E-mail:
6.3 FITTING WATER DEFLECTOR
ø215/265
Assemble the bearing housing and the shaft seal cover. Lead the water deflector (11) over the shaft until
it touches the shaft seal cover and then further 1-1.5 mm into the shaft seal cover.
ø330/415/465/525
Lead the water deflector (11) over the shaft until it touches the cover under bearing (26) and then further
1-1.5 mm towards the cover under bearing. Assemble the bearing housing and the shaft seal cover.
6.4 FITTING SHAFT SEAL
Before fitting the seat, clean the recess in the shaft seal cover. When fitting the seat, remove the protective
coating without scratching the lapped surface. Dip the outer rubber ring of the seat into silicone grease.
Now press the seat into place with the fingers and check that all parts are correctly imbedded.
If it is necessary to use tools for assembling, then protect the sliding surface of the seat to prevent it from
being scratched or cut. Lubricate the inner diameter of the slide ring rubber bellows with silicone grease
and push it over the shaft. The use of a fitting bush as shown on the assembly drawing is recommended
to avoid that the rubber bellows is cut.
Push the slide ring over the shaft with the hand. If the rubber bellows is tight, use a fitting tool and take
care that the slide ring is not damaged. If the carbon ring is not fixed, it is important to check that it is fitted
correctly, i.e. the chamfered/lapped side is to face the seat. The carbon ring can be held by a little grease.
When using silicone grease on the shaft, the bellows will settle and seat in about 15 minutes, and until
then tightness should not be expected. After start, check by viewing the leak hole at the bottom of the
bearing housing that there are no leaks.
6.5 FITTING IMPELLER
Fit the sunk key in the shaft and lead the impeller towards the shoulder of the shaft. Take care that the
ring at the end of the shaft seal spring locates in the recess of the impeller. Secure the impeller with
washers (7 and 8) and a nut (ø215/265) or a set screw (ø330/415
/
465/525).
6.6 FITTING BEARING HOUSING AND SHAFT SEAL COVER
Place the O-ring (21) between pump casing and shaft seal cover on the shaft seal cover where it can be
held with a little grease. However, check the material of the O-ring first. As standard the material is nitrile,
but it might be EPDM which will be damaged by mineral grease. Use soft soap or silicone grease for EPDM.
Fit and fasten bearing housing and shaft seal cover. Screw the pointed screw (86) back into the shaft seal
cover before tightening. Insert the copper pipe (58).
6.7 SHAFT
When the pump has been assembled, check that the shaft rotates freely.