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Центробежные насосы
N4 65-160B/A
Инструкция по эксплуатации Страница: 13

CALPEDA N4 65-160B/A [13/44] Pumps with stuffing box

7.2.

Pumps with stuffing box

On starting for the first time, slightly loosen the

stuffing box gland so that seal is decompressed.

Then adjust the stuffing box gland to obtain a nor-

mal degree of dripping which will indicate that the

seal is lubricated correctly.

The packing must be replaced when its sealing

properties have considerably decreased.

A packing which has become too compressed har-

dened and dry will cause the shaft sleeve to wear.

7.3.

Ball bearings and lubrication

For the motor see separate instructions (if sup-

plied).

Pump bearings are lubricated with high quality

lithium soap grease.

Initial lubrication at the factory will be sufficient for

5,000 hours operation. After this period, the shaft and

bearings should be dismantled for checking, cleaning

(bearings, covers and support have to be washed with

diluent) and re-lubrication with fresh grease

In heavy working conditions (over 8 hours/day, in

dusty or humid environments or with high ambient

temperature), re-lubrication (add grease) should

be performed by means of the lubricating nipples

at least once every six months for operation at

2,900-3,600 r.p.m. and at least once a year for

operation at 1,450-1,800 r.p.m.

Perform lubrication while motor is running.

The table on page 42 indicates the types of bea-

rings of the different pumps and the quality of

grease for re-lubrication in grams (g).

Replacing bearings (see section 8).

Mount the bearings cold on the shaft with a press

(or by heating only the ring hole to a maximum

temperature of 70 °C), oiling slightly the surface of

seatings and using a tube of soft metal which must

only come into contact with the internal ring of the

bearing that has to be mounted.

For particularly heavy duty, use bearings with C3

clearance, lubricated with grease suitable for ope-

ration temperatures of the pump. Consult the sup-

plier of the bearings.

7.4.

When the pump is not in use

ATTENTION: when the pump is not used, it

must be completely drained if there is a risk of

freezing (fig. 9).

Before re-starting the unit, make sure the shaft is

not jammed by incrustation or deposits and com-

pletely refill the pump casing with liquid.

Disconnect electrical power before any

servicing operation (only adjustment of

the

stuffing box, section 7.2, and lubrica-

tion procedure, section 7.3, may be

performed, with caution, while motor is running).

8. Disassembly

Close the suction and delivery gate valves and

drain the pump casing before dismantling the pump

(fig. 9).

The motor and all internal parts can be dismantled

without removing the pump casing from the pipes

(fig. 10).

Disassembly sequence with normal coupling wi-

thout spacer (fig. 10):

1) coupling guard;

2) motor;

3) support foot (if fitted);

4) on removing the nuts (14.28) the bearing hou-

sing and shaft unit, with impeller and casing cover,

is completely removed.

For disassembly and reassembly, see construction

in the cross section drawing (page 34).

9. Spare parts

When ordering spare parts, please quote data stam-

ped on name-plate, part designation (page 34) and

the position number of each spare part required (in

accordance with cross section drawing on page 34).

Any pumps that require inspection/re-

pair must be drained and carefully

cleaned inside and outside before di-

spatch/submission.

Changes reserved.

Fig. 9 Draining.

Fig. 10 Disassembly sequence.

4.93.039

4.93.142

Содержание

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7 2 Pumps with stuffing box On starting for the first time slightly loosen the stuffing box gland so that seal is decompressed Then adjust the stuffing box gland to obtain a nor mal degree of dripping which will indicate that the seal is lubricated correctly The packing must be replaced when its sealing properties have considerably decreased A packing which has become too compressed har dened and dry will cause the shaft sleeve to wear 7 3 Ball bearings and lubrication For the motor see separate instructions if sup plied Pump bearings are lubricated with high quality lithium soap grease Initial lubrication at the factory will be sufficient for 5 000 hours operation After this period the shaft and bearings should be dismantled for checking cleaning bearings covers and support have to be washed with diluent and re lubrication with fresh grease In heavy working conditions over 8 hours day in dusty or humid environments or with high ambient temperature re lubrication add grease should be performed by means of the lubricating nipples at least once every six months for operation at 2 900 3 600 r p m and at least once a year for operation at 1 450 1 800 r p m Perform lubrication while motor is running The table on page 42 indicates the types of bea rings of the different pumps and the quality of grease for re lubrication in grams g Replacing bearings see section 8 Mount the bearings cold on the shaft with a press or by heating only the ring hole to a maximum temperature of 70 C oiling slightly the surface of seatings and using a tube of soft metal which must only come into contact with the internal ring of the bearing that has to be mounted For particularly heavy duty use bearings with C3 clearance lubricated with grease suitable for ope ration temperatures of the pump Consult the sup plier of the bearings 7 4 When the pump is not in use ATTENTION when the pump is not used it must be completely drained if there is a risk of freezing fig 9 Before re starting the unit make sure the shaft is not jammed by incrustation or deposits and com pletely refill the pump casing with liquid Disconnect electrical power before any servicing operation only adjustment of the stuffing box section 7 2 and lubrica tion procedure section 7 3 may be performed with caution while motor is running A 8 Disassembly Close the suction and delivery gate valves and drain the pump casing before dismantling the pump fig 9 The motor and all internal parts can be dismantled without removing the pump casing from the pipes fig 10 Fig 10 Disassembly sequence Disassembly sequence with normal coupling wi thout spacer fig 10 1 coupling guard 2 motor 3 support foot if fitted 4 on removing the nuts 14 28 the bearing hou sing and shaft unit with impeller and casing cover is completely removed For disassembly and reassembly see construction in the cross section drawing page 34 9 Spare parts When ordering spare parts please quote data stam ped on name plate part designation page 34 and the position number of each spare part required in accordance with cross section drawing on page 34 A Fig 9 Draining Any pumps that require inspection repair must be drained and carefully cleaned inside and outside before dispatch submission Changes reserved 13

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