Richter MNKA Series (ASME) User Manual download pdf (Page 12)

Series MNKA, acc. to ASME Page 12

9250-050-en Revision 11

TM 7903 Edition 07/2010

5.4.6 Venting and draining

Venting can take place into the discharge line or

upstream of the discharge valve.

A venting line can also be used as a bypass, drain or

flushing line.

The pump housing (casing) is fitted with a drain

connection as a standard feature. Optionally, the drain

bore can be drilled. See

Figure 4.

Fig. 4

5.5 Pipe fittings

The following pipe fittings are available from Richter

on request :

 Shut-off valves

 Check valves

 Sight glasses

 Priming vessels

 Strainers

 Pressure gauges

Fig. 5

5.6 Monitoring facilities

Appropriate monitoring facilities are to be

recommended, depending on the

requirements placed on operational safety and

availability of the unit.

Richter provides information on request and can

supply:

 Flow meters

 Filling level indicators

 Motor load monitors

 Temperature monitors

 Rolling bearing monitors

 Can monitors

 Leak monitors

You can obtain the publications "Safe Operation of

Magnetic drive Pumps" and "The Operation of

Centrifugal Pumps without NPSH Problems" on

request.

5.7 Drive

The power consumption of the pump at the operating

design point is specified in the data sheet and works

certificate. If the operating design point was not known

when the pump was dispatched, the power

consumption can be read off the appropriate

performance curves. The max. density, the max.

viscosity and a safety margin are to be allowed for.

Care must be taken when selecting the motor size to

ensure that the excess power is not too great, but

meet requirements acc. to ANSI/HI respec. ISO 5199.

During start-up the magnetic drive could otherwise

stop.

The magnetic drive rating at the nominal speed of

3500 rpm is given in the pump data sheet.

If the motor power exceeds this rating, it is necessary

to check the stoppage of the magnetic drive.

The same also applies if the required drive rating

exceeds 80 % of the magnetic drive rating.

Consult Richter if necessary.

Different operating data can be achieved without

changing the pump through the use of different

speeds, e.g. by means of a frequency converter.

The pump with base plate and motor is illustrated in

the

installation drawing.

The

operating manual of the motor manufacturer

must be observed.

A motor with a valid ATEX certificate is to be

used if employed in zone 1 and 2.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 29 30

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Richter MNKA Series (ASME) User Manual Page 12

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