Flowserve MENBLOC 60Hz User Manual download pdf (Page 23)

MENBLOC 60Hz USER INSTRUCTIONS ENGLISH 71559945 - 02/13

Page 23 of 36 flowserve.com

Ensure the inlet pipe and pump

casing are completely full of liquid before starting

continuous duty operation.

These operations must be carried out by personnel

with approved qualifications.

5.3.1 Priming of a pump with flood suction

a) With the discharge valve closed, fill the pump

by opening the suction valve. Let air escape

by removing the plug located on the pump

casing.

b) When the discharge pipe is full and if there is a

by-pass valve on the check valve, open

slightly the discharge valve and the by-pass of

the check valve.

c) When the pump is totally free of air bubbles,

replace the plugs.

Air escape

Priming of a flooded pump

5.3.2 Priming of a pump on suction lift

* With foot valve:

a) Fill suction pipe and casing with liquid from an

independent source (pressure 1 to 2 bars or

15 to 30 psi).

a) Let air escape by removing the plugs located

on the pump.

b) When the pump is totally free of air bubbles,

replace the plugs.

E x te rn a l s

o u rce

A ir e sca p e

P rim in g o f s u m p s u ctio n p u m p w ith fo o t v alv e

Priming of sump suction pump with foot valve

*Without foot valve:

Priming may be accomplished by means of venting

system.

Foot valves are not recommended when

the pumped liquid has suspended solid particles.

They may lodge between foot valve seat and disc.

5.4 Starting the pump

5.4.1 Bring controls and preparation before the

first starting and after each service call

Necessarily:

a) Check the tightening of the different plugs.

b) Check that the motor bearings are correctly

greased (where regreasing is possible).

c) Guarding is supplied fitted to the

pump set. If this has been removed or

disturbed ensure that all the protective guards

are securely refitted.

d) Open all inlet valves (if existing).

e) Close the outlet valve and the bypass valve

f) Ensure inlet pipe and pump casing are

completely full of liquid.

g) Make sure that the motor fan cowl is not

obstructed or too near to a wall or obstruction.

5.4.2 First pump start-up

Suction valves must be fully open

when pump is running. Never run the pump dry, it

will cause damage.

a) Check the direction of rotation is as indicated

by the arrow on the motor casing or cover,

using a brief burst of power. If it is not correct

then isolate the motor and reverse the

connection of two phases.

b) Start motor and check outlet pressure.

c) If pressure is satisfactory, slowly OPEN the

outlet valve.

d) Do not run the pump with the outlet valve

closed for a period longer than 30 seconds.

e) If NO pressure, or LOW pressure, STOP the

pump. Refer to faultfinding chart for fault

diagnosis.

The pump should run smoothly and without

vibration.

The pump must never run at a capacity of less

than 40 % of that at the best efficiency.

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Flowserve MENBLOC 60Hz User Manual Page 23

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