Viking Pump TSM000: General Information - Manual (Page 5)

SECTION TSM 000 ISSUE I PAGE 5 OF 8
figurE 10
figurE 11
8. STrAiNEr - It is always good practice to consider a strainer on
the suction side of a positive displacement pump The strainer
will keep foreign objects from going into the pump; without a
strainer some would go through; others would cause a jammed
pump, a broken part, or a torn up drive The strainer basket
mesh or perforation size should be big enough so that it does
not cause excessive pressure drop, but it should be fine enough
to protect the pump When in doubt as to the proper size, check
with the manufacturer, giving him pipe size, flow rate, and
viscosity involved Provision should be made for cleaning the
strainer If the pump operates continuously, a bypass should be
built around the strainer or two strainers should be put in parallel
with proper valving so they can be isolated for cleaning Use of
a strainer is particularly important at start up to help clean the
system of weld beads, pipe scale, and other foreign objects For
additional information, refer to TSM640.
9. If the pump is not equipped with a relief valve, consideration
should be given to mounting one in the discharge line See
discussion on relief valves under STArT up.
10. The pump should not be used to support the piping The weight
of the pipe should be carried by hangers, supports, stands,
etc
11. When fastening the piping to the pump it should not be
necessary to impose any strain on the pump casing “Springing”
or “drawing” the piping up to the pump will cause distortion,
possible misalignment, and probable rapid wear of the pump
Do not use the pump to correct errors in piping layout or
assembly
STArT up
before pushing the “start” button, check the following:
1.
Are there vacuum and pressure gauges on or near the pump?
These gauges are the quickest and most accurate way of finding
out what is happening in the pump
2. Check alignment - See suggestions under “installation -
Alignment” in this manual
3. Check piping to be sure there is no strain on the pump casing
4. Rotate the pump shaft by hand to be sure it turns freely MAkE
SurE ThE puMp drivEr iS LOCkEd OuT Or CANNOT
bE ENErgiZEd bEfOrE dOiNg ThiS.
5. Jog motor to be sure it is turning in the right direction; see
discussion on pump rotation under “installation - general
Comments” item 4 in this manual
6. Check any relief valves to be sure they are installed correctly See
discussion on relief valves under “installation - general”.
7. Check suction piping to be sure (a) it is all connected and tight,
(b) valves are open, and (c) end of pipe is below liquid level
8. Check discharge piping to be sure (a) it is connected and tight,
(b) valves are open, and (c) there is a place for the liquid to
go
9. Lubricate any grease fitting on the pump using a good, general
purpose #2 ball bearing grease Check any gear reducer, motor,
coupling, etc for instructions and lubricate as recommended
See Engineering Service bulletin ESb-515.
10. For packed pumps, loosen packing gland nuts so gland can be
moved slightly by hand Adjust gland to reduce leakage only
after pump has run long enough to reach constant temperature
Packing should weep a little to keep it cool and lubricated
11. Do not use the Viking pump to flush, pressure test or prove the
system with water Either remove the pump or run piping around
it while flushing or testing Pumping water, dirty or otherwise,
can do more damage in a few minutes than months of normal
service
12. Check to be sure all guards are in place
12. All joints of the piping system should be tight; pipe sealer will
help assure leak-free threaded joints Leaks in the suction line
permitting air to be drawn in may cause a noisy pump, or a
reduction in capacity
13. ALigNMENT - Check the alignment of the drive after the piping
is hooked up As a final check on pump alignment remove the
head of the pump and with a feeler gauge determine if there
is clearance all the way around between the rotor and casing
Because of manufacturing tolerances, bushing clearances,
etc , the rotor may not be centered in the casing, but it should
not drag; dragging would indicate unit misalignment or casing
distortion from piping strain Making this check is most desirable
on installations involving Q, M and N size standard duty
pumps
14. The auxiliary piping hooked to jackets, glands, etc for heating,
cooling, quenching, or for other purposes should receive the
same attention as the piping handling the liquid pumped
15. Provide a pressure relief device in any part of a pump and piping
system that can be valved off and, thus, completely isolated
This is particularly important:
a) When handling a cold liquid such as refrigeration ammonia
that can warm up to ambient temperatures when the pump
is shut off or
b) When handling a liquid such as asphalt or molasses that
has to be heated before it can be pumped
The rise in temperature causes the liquid to expand; if there is
no provision for pressure relief in the closed off section, there is
a chance that the pump or piping will rupture
GO AROUND THE
OBSTRUCTION ON
THE HORIZONTAL
OBSTRUCTION
dO ThiS NOT ThiS
OBSTRUCTION
kEEp LONg
hOriZONTAL LiNE
NEAr Liquid LEvEL
ThiS
NOT ThiS