Richter MNKA Series (ASME) User Manual download pdf (Page 14)

Series MNKA, acc. to ASME Page 14

9250-050-en Revision 11

TM 7903 Edition 07/2010

6 Commissioning/Shutdown

6.1 Initial commissioning

Normally, the pumps have already been test-run with

water. Unless special agreements have been made,

there could still be residual amounts of water in the

pump. This must be noted in view of a possible

reaction with the medium.

Grease for life lubrication

The rolling bearings are greased for life.

Regreasing is not possible and not necessary.

For service lives, see Section 7.2.

Oil bath lubrication

Pour in oil into the bearing pedestal!

For procedure and the oil grade, see Sections 7.2

and 7.8.5

6.1.1 Filling the pump housing (casing)

 Check to see whether the screws on the suction

flange, discharge flange, housing (casing) flange

and drain flange are tightened. When retightening

the housing (casing) screws, make sure that the

support bracket is undone. Otherwise, the pump

could be deformed.

For screw tightening torques see

Section 1.1.

 Open the suction line fully so that the medium can

flow into the pump.

 Open the discharge valve so that the air in the

pump can escape.

 If air cannot be vented into the discharge line, e.g.

a drop in pressure in this line is not permitted,

venting must be performed upstream of the

discharge valve.

 Monitor the venting operation until no air but only

liquid emerges.

 Turn the pump shaft at the coupling several times.

 Monitor the venting operation again until no more

air emerges.

 Close the discharge valve again until

only the minimum flow rate is obtained

after the motor has been started.

6.1.2 Start-up

 Check to see whether the pump shaft can be

readily turned by hand.

 Check the direction of rotation of the

motor with the coupling disengaged or

with a rotary field instrument.

 As viewed from the motor, the direction of rotation

of the pump is clockwise. See also the

direction of

rotation arrow

of the pump.

The pump must not run dry during the check

of the direction of rotation.

 Engage coupling, check alignment and secure.

 Mount coupling guard.

The pump must be completely filled with

liquid. The maximum admissible flow rate

must not be exceeded.

Otherwise the plain bearings can run dry in

both cases.

 Switch the motor on.

 Set the desired flow by opening the discharge

valve.

When the motor is running but the pump is not

conveying, this means that the magnetic drive

has stopped.

Switch the motor off immediately to prevent

overheating of the magnets.

Then proceed as follows:

 Close discharge valve down to the position

"minimum flow rate".

 Start motor again.

If the magnetic drive stops again, look for the cause.

Excessive power consumption may cause the

magnets to decouple. If this happens the

pump must be shutdown immediately and

cause corrected prior to restarting. Failure to do this

could result in demage to internal parts Failure to

follow this instructions may result in property damage,

sever personal injury, or death.

6.2 Operating limits

The operating limits of the pump/unit in terms

of pressure, temperature, power and speed

are entered in the data sheet and it is

imperative to observe them!

6.2.1 Abrasive media

If liquids with abrasive constituents are

conveyed, increased wear at the pump is to

be expected. The inspection intervals should

be reduced compared with the usual times.

6.2.2 Min./max. flow rate

The operating range generally recommended lies at

0.3 Q

opt

to 1.1 Q

opt

. Consult the manufacturer for

operation outside this range and observe

Section

2.6.2.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 29 30

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Richter MNKA Series (ASME) User Manual Page 14

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