Calpeda MXV Instrucciones Originales De Uso página 47

Vertical multi-stage in-line pumps
MXV 50-16, 65-32, 80-48
OPERATING INSTRUCTIONS
Table of contents
Subject
1. Operating conditions
2. Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4. Connecting the motor . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5. Pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5.1 Suction pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
5.2 Delivery pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
6. Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
7. Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
7.1. Preliminary checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
7.2. Filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
7.3. Starting and checking operations . . . . . . . . . . . . . . . . . .8
8. Maintenance and monitoring pump operation . . . . . . . .9
9. Dismantling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
9.1. Replacing the mechanical seal . . . . . . . . . . . . . . . . . . .10
9.2. Replacing the ball bearing . . . . . . . . . . . . . . . . . . . . . . .10
9.3. First-stage bearing and intermediate bearing . . . . . . . . . . . .10
10. Remounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
10.1. Tightening torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
10.2. Axial position of the pump rotor . . . . . . . . . . . . . . . . . . .10
11. Horizontal installation . . . . . . . . . . . . . . . . . . . . . . . . . .10
11.1 Connection of support feet . . . . . . . . . . . . . . . . . . . . . .10
12. Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
13. Cross section drawing and designation of parts . . . . . .11
13.1. Stages composition . . . . . . . . . . . . . . . . . . . . . . . . .37-39
13.2. Impellers and sleeves composition . . . . . . . . . . . . .37-39
READ AND FOLLOW ALL INSTRUCTIONS
1. Operating conditions
Standard construction
- For clean liquids: non-explosive and non-flammable, non-hazardous
for health or the environment, non-aggressive for pump
materials, not containing abrasives, solid or fibrous particles.
- With seal rings in EPDM the pump is not suitable for use with oil.
- Maximum final pressure in the pump casing: 25 bar.
- Liquid temperature: -15˚C to +110˚C.
- Installation in well-ventilated locations protected against the
weather, with maximum environment temperature of 40˚C.
2900 1/min
Rated motor power
Sound pressure
Starts/hour
When a non-standard motor is installed, refer to the rated operating
conditions and noise-level values in the instructions for the motor.
a
Fig.1a Raising pump without the motor
b Raising motor without the pump
c Raising pump with motor
. . . . . . . . . . . . . . . . . . . . . . . . . . .7
up to kW: 4 7,5
dB (A) max: 69 74
max: 30 24
b c
c
Max 270 kg
4.93.214
2. Transportation
Raise and transport the pump and pump-motor unit (without
packaging) as indicated in fig. 1. Raise the pump-motor unit
slowly (fig.1c), making sure it does not move from side to side
in an uncontrolled way, to avoid the risk of imbalance and
tipping up. For horizontal raising, brace the pump in a sling
close to the centre of gravity.
3. Installation
The MXV 50-16, 65-32 and 80-48 standard version pumps
Page
must be installed with the rotor axis in the vertical position and
with the base under the pump.
They can also be installed in the horizontal position, using the
appropriate support feet, which are supplied on request (see
section 11.).
Install the pump as close as possible to the suction source (with
consideration given to the NPSH value).
Provide space around the pump for motor ventilation, to
allow for checking of shaft rotation, for filling and draining
the pump and to allow for collection of the liquid to be
removed (especially for draining liquids which are harmful or
have to be removed at temperatures higher than 60 ˚C).
Make sure prolonged accidental leakage of liquid
does not cause damage to persons or property.
Leakage may develop as a result of surge pressure or
water hammer, erroneous operations (such as failing
to close a plug or valve) or other functional disorders. Allow
for the possibility of channeling away any leaked liquid or
for an automatic drainage system against flooding.
Mount the pump on a flat horizontal surface (using a level gauge)
such as a solid cement base or a rigid supporting structure in metal.
To ensure stability, insert, if necessary, small pieces of
calibrated metal plate next to the 4 anchoring screws.
4. Connecting the motor
The MXV pumps are designed for use with standard electric
motors with (IEC 34-7) IM V1 construction form and dimensions
and output ratings in accordance with IEC 72.
If a pump is supplied without the motor, check the rated
power and rpm indicated on the name plate and technical data
given in the data sheet.
ATTENTION: the motors must have two lifting points in di-
ametricalIy opposite positions for vertical lifting with the shaft
end downwards (fig.1 b)
Before installation clean the motor shaft extension, the key and
contact surfaces of the flanges to remove any protective paint,
dirt or oxydation.
Lubricate the motor shaft extension with a graphite-base,
22
dripfree, anti-friction product.
76
Do not use oil as it can harm the mechanical seal below (see
section 9.1.).
15
With the pump in the vertical position, insert the motor shaft in
the coupling, aligning the key with the key slot and resting the
motor flange on the lantern flange.
Turn the motor, adjusting the position of the terminal box as
required and aligning the holes on the flanges.
ATTENTION: the 4 flange screws (70.18) with nut must be
uniformly tightened with alternated crossover tightening proce-
dure in diametrically opposite positions (see section 10.1.).
Before and after tightening the screws (70.18), make sure the
coupling with pump shaft and motor shaft can be freely
turned by hand (remove and then replace the guard 32.30).
ATTENTION: for removing or replacing the motor see
section 9.
5. Pipes
Provide a diameter assuring a liquid flow velocity not higher
than 1.5 m/s for suction, and 3 m/s for delivery.
The pipe diameters must never be smaller than the pump
connection ports.
The arrows on the pump casing (14.00) indicate the inlet
(suction) and outlet (delivery) ports.
Ensure the internal pipe surface is clean before connection.
Secure all pipes to their rests close to the pump and connect
them so that they are not subjected to stress and do not
transmit vibration or flexion strain to the pump (see fig.2).
7