Viking Pump TSM343.1: Vi-Corr Mag Drive - Manual (Page 3)

TSM 343.1 ISSUE D PAGE 3 OF 13
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 is required to reduce suction losses.
2. Be sure the inside of pipe is clean before installing.
3. When approaching an obstacle in the suction line, go
around instead of over it. Going over obstacle creates an
air pocket. Where practical slope piping, slope piping so
no air or liquid pockets will be formed. Air pockets in
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 straining will
keep foreign matter from entering the pump. The strainer
mesh or perforation size should be as fine as possible to
protect the pump without causing excessive pressure
drop. 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 Pressure Relief Valves, SPECIAL INFORMATION,
page 2.
6. Pump must not be used to support piping. Weight of pipe
must be carried by hangers, supports, stands, etc.
7. When fastening to the pump to impose any strain on
pump casing. "Springing" or "drawing" piping up to pump
will cause distortion; possible misalignment and probable
rapid wear of pump. Do not use pipe 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. One full turn beyond hand tight is all that
is needed for proper connection. Do not use Teflon tape.
Reduced friction makes over tightening very easy and will
result in cracked ports.
9. Drive alignment must be checked after piping is hooked
up.
10. Provide a pressure relief device if any part of a pump and
piping system that can be valved off, thus completely
isolated. A rise in temperature will cause liquid to expand.
With 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.
DANGER
BEFORE STARTING PUMP, BE SURE ALL DRIVE
EQUIPMENT GUARDS ARE ADEQUATE AND IN
PLACE.
FAILURE TO PROPERLY MOUNT GUARDS MAY
RESULT IN SERIOUS INJURY OR DEATH.
PAGE 3 Of 13 ISSUE C SECTION TSM 343.1
Clockwise Rotation RP-805
(viewed from shaft end)
CW ROTATION
CW ROTATION
Clockwise Rotation RP-807 (MD-A)
(viewed from shaft end)
Clockwise Rotation RP-807 (MD-B)
(viewed from shaft end)
fIGURE 3
USE STRAIGHT EDGE. THESE SURFACES MUST BE PARALLEL
CHECK WIDTH BETWEEN THESE SURFACES WITH
INSIDE CALIPERS TO BE CERTAIN THE FACES ARE
EQUAL DISTANCE APART AND PARALLEL.
COUPLING
ALIGNMENT
fIGURE 4