Viking Pump TSM340.1: SG-10, SG-14 - Manual (Page 4)

SECTION TSM 340.1 ISSUE D PAGE 4 OF 11
PIPING/HOSE:
The cause of many pumping problems can be traced to
suction piping. It should always be as large in diameter and
as short in length as possible.
Before starting layout and installation of your piping system,
consider the following points:
1. Never use piping smaller than pump port connections.
Piping larger in diameter than the port connection is
sometimes required to reduce suction losses.
2. Be sure the inside of pipe is clean before installing.
3. When approaching an obstacle to the suction line, go
around instead of over it. Going over an obstacle can
create an air pocket. Where practical, slope the piping so
no air or liquid pockets will be formed. Air pockets in the
suction line make it hard for the pump to prime.
4. A strainer on the suction side of the pump should always
be considered in any pumping system. The strainer will
keep foreign matter from entering the pump. The strainer
mesh or perforation size should be large enough so that it
does not cause excessive pressure drop, but fine enough
to protect the pump. Use of a strainer is particularly
important at start up to help clean the system of weld
beads, pipe scale and other foreign objects.
5. A pressure relief valve is required in the discharge line.
See “Installation, General” page 3.
6. The pump must not be used to support the piping.
Hangers, supports, stands, etc. must carry the weight of
the pipes.
7. When fastening piping to the pump do not 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.
8. All joints of piping system must be tight; liquid thread
sealant will help assure leak free threaded joints. Loose
joints result in liquid leaks or suction side leaks. Air leaks
make the pump noisy and reduce flow.
CAUTION: Be careful not to over tighten fittings as
this can cause cracked joints. Do not use PTFE tape.
Reduced friction makes over tightening very easy and
will result in cracked ports. Leaks in the suction line can
permit air to be drawn in, and will cause a noisy pump and
reduction in capacity.
9. Drive alignment must be checked after piping is hooked
up.
10. Provide a pressure relief device in any part of a pump
and piping system that can be valved off and, thus,
completely isolated. A rise in temperature will cause a
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.
START UP:
Before pushing “start” button, check the following:
1. Vacuum and pressure gauges (liquid filled) are mounted
on or near the pump. Gauges are the quickest and most
accurate way of finding out what is happening in the
pump.
2. Pump is correctly aligned.
3. There is no pipe strain on the pump casing.
4. Rotate the pump shaft by hand to be sure it turns freely.
5. Motor has been jogged and is running in the correct
direction. Refer to “Installation, General” on page 3.
6. Pressure relief valve is installed properly.
7. Suction piping is connected and tight, and valves are
open.
8. Make sure the discharge piping is properly connected and
sealed, valves are open, and there is a place for the liquid
to go.
9. Make sure all guards are in place.
10. The above checklist is a general guideline to be used prior
to starting the pump. Since Viking Pump cannot foresee
every application for our product and possible system
design, the final responsibility is with the user. The pump
must be utilized within the catalog specifications and the
pump system must be designed to provide safe working
conditions.
The “start” button may now be pushed.
The pump should begin to deliver liquid within 15 seconds! If
not, push the stop button. Do not run the pump without liquid
flow longer than 30 seconds or the pump may be ruined.
Review Startup steps 1 through 10. Consider what the suction
and discharge gauges may indicate. If everything appears in
order, re-prime pump. Refer to “Mounting”, page 3.
Push the “start” button. If nothing is flowing within 30 seconds,
stop the pump. The pump is not a compressor, it will not build
up much air pressure. It may be necessary to vent discharge
line until liquid begins to flow.
If pump still does not deliver, consider one or more of
the following:
1. The suction line has air leaks.
2. The end of the suction pipe is not submerged deeply
enough in the liquid.
3. The suction lift is too great or the suction piping is too
small.
4. Liquid is vaporizing in the suction line before it gets to the
pump.
If after consideration of these points, the pump still does not
deliver liquid, review all points given under START UP and
read through the TROUBLESHOOTING guide and try again.
If pump still will not deliver liquid, contact your Viking Pump
supplier.
DANGER!
Before starting the pump, be sure all drive
equipment guards are in place.
Failure to properly mount guards may result
in serious injury or death.
MAINTENANCE:
Series SG-10 and SG-14 pumps are designed for long,
trouble-free service life under a wide variety of application
conditions with a minimum of maintenance. The points listed
below will help provide long service life.