Flowserve MENBLOC - Manual (Page 21)

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13
Page 21 of 40 flowserve.com
5 COMMISSIONING, START-UP,
OPERATION AND SHUTDOWN
These operations must be carried out by
fully qualified personnel.
5.1 Direction of rotation
Starting or operating pumps with
the wrong direction of rotation can be harmful to
the pumps. Ensure that the pump rotation is the
same as the arrow on the pump casing.
It is preferable to check the direction of rotation
before installing the coupling. If not, the pump
must be filled in with the liquid before start-up.
If maintenance work has been
carried out to the site's electricity supply, the
direction of rotation should be re-checked as
above in case the supply phasing has been
altered.
5.2 Guarding
Guarding is supplied fitted to the pump set.
If this has been removed or disturbed ensure
that all the protective guards around the pump
coupling and exposed parts of the shaft are
securely fixed.
5.3 Priming and auxiliary supplies
Where there is any risk of the pump being run
against a closed valve generating high liquid and
casing external surface temperatures it is
recommended that users fit an external surface
temperature protection device.
Ensure all electrical, hydraulic,
pneumatic, sealant and lubrication systems (as
applicable) are connected and operational.
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 rc e
A ir e s c a p e
P r im in g o f s u m p s u c tio n p u m p w ith fo o t v a lv 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.