Viking Pump TSM000: General Information - Manual (Page 4)

SECTION TSM 000 ISSUE I PAGE 4 OF 8
3. If the pump is driven by V-belts, check the alignment by using a
long straightedge or tightly drawn string across the face of the
sheaves See figure 6A.
4. Make a final check on alignment after piping is hooked up
See item 13 under “installation - piping.
figures 7, 8, and 9 show typical units - direct, gear
reducer and V-belt drive
5. For high temperature applications (those above 300°F) allow the
pump to reach operating temperature, then recheck alignment
figurE 6
figurE 6A
figurE 7
dirECT drivE
figurE 8
rEduCEr drivE
figurE 9
v-bELT drivE
The cause of many pumping problems can be traced to suction
piping It should always be as large and short as practical For help
in selecting the proper size piping, both suction and discharge, refer
to viking general Catalog Section 510.
Before starting layout and installation of your piping system, consider
the following points:
1. Never use piping smaller than the pump port connections
2. Be sure the inside of the pipe is clean before hooking it up
3. Foot valve - When pumping a light liquid with a suction lift, a
foot valve at the end of the suction piping or a check valve in
the first horizontal run will hold the liquid in the line and make it
easier for the pump to prime Be sure the foot or check valve is
big enough so that it doesn’t cause excessive line loss
4. When approaching an obstacle in the suction or discharge line,
go around the obstacle instead of over it Going over it creates
an air pocket See figure 10.
5. 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
6. For a suction line with a long horizontal run keep the horizontal
portion below the liquid level if possible This keeps the pipe
full so the pump does not have to remove so much air when
starting; this is most helpful when there is no foot valve See
figure 11.
7. When piping a hot or cold system (liquid being handled is at a
temperature different from the air surrounding the pump), be
sure allowance is made for expansion and contraction of the
piping Loops, expansion joints, or unsecured (this does not
mean unsupported) runs should be used so the pump casing is
not distorted or put into a bind
pipiNg
ChECk widTh bETwEEN ThESE SurfACES wiTh
iNSidE CALipErS TO bE CErTAiN ThE fACES ArE
EquAL diSTANCE ApArT ANd pArALLEL.
uSE A STrAighT EdgE. ThESE
SurfACES MuST bE pArALLEL.
drivEr
ShEAvE drivEN
ShEAvE
STriNg
Or
STrAighT EdgE
a b C D
whEN ShEAvES ArE prOpErLy ALigNEd, ALL pOiNTS
A, b, C, d wiLL TOuCh STriNg Or STrAighT EdgE.