Viking Pump TSM000: General Information - Manual

SECTION TSM 000
PAGE
1 Of 8
ISSUE I
VIKING PUMP, INC. • A Unit of IDEX Corporation •
Cedar Falls, IA 50613 USA
TECHNICAL SERVICE MANUAL
CONTENTS
figurE 1
Installation, General Comments 1
Safety Information and Instructions 2
Foundation 3
Alignment 3
Piping 4
Start Up 5
Rapid Wear 6
Troubleshooting 6
Preventative Maintenance 7
Do’s and Don’ts 8
Before installation is started, a few items of a general nature should
be considered
1. Location - always locate the pump as close as possible to the
supply of liquid to be pumped Locate it below the liquid supply
if at all practical Viking pumps are self priming but the better the
suction conditions the better the performance
2. Accessibility - the pump should be located where it is accessible
for inspection, maintenance, and repair For large pumps, allow
room to remove the rotor and shaft without removing the pump
from the base
3. Port Arrangement - since the pumps have different port
arrangements depending on the model, port location should
be checked before starting the installation The ports may be
upright, opposite or at right angles to each other, see figure
1. The right angle ports are normally right-hand, see figure
2; some models are available with left-hand arrangements; still
other models are available with the right angle ports located in
any one of eight positions including right-hand and left-hand
4. Suction/Discharge - shaft rotation will determine which port is
suction and which is discharge A look at figure 3 will show
how rotation determines which port is which; as the pumping
elements (gears) come out of mesh, point “A” on figure 3,
liquid is drawn into the suction port; as the gears come into
iNSTALLATiON
gENErAL COMMENTS
figurE 2
figurE 3
5. Pressure Protection - Viking pumps are positive displacement
This means that when the pump is rotated, liquid will be delivered
to the discharge side of the pump If there is no place for this
liquid to go - discharge line is blocked or closed - pressure can
build up until the motor stalls, the drive equipment fails, a pump
part breaks or ruptures, or the piping bursts Because of this,
some form of pressure protection must be used with a positive
displacement pump This may be a relief valve mounted directly
on the pump, an inline relief valve, a torque limiting device or a
rupture disk
figurE 4
CuTAwAy Of vikiNg iNTErNAL prESSurE rELiEf vALvE
CAp
SpriNg (A) vALvE bOdy (C)
pOppET (b)
Liquid OuTLET Liquid iNLET
pOiNT (E)
AdjuSTiNg
SCrEw (d)
(ShOuLd ALwAyS
pOiNT TOwArd
SuCTiON pOrT)
The pressure relief valve mounted on Viking pumps and most in-line
valves are of the spring loaded poppet design See figure 4. The
spring (A) holds poppet (b) against the seat in the valve body (C)
with a given force determined by the spring size and by how tightly
it is compressed by the adjusting screw (d). The pump discharge
pressure pushes against the underside of the poppet at point (E).
When the force exerted by the liquid under the poppet exceeds that
exerted by the spring, the poppet lifts and liquid starts to flow through
the valve As the discharge pressure builds up, more and more of
the liquid flows through until a pressure is reached at which all of the
liquid being pumped is going through the valve This pressure is the
relief valve setting
mesh, point “b”, the liquid is forced out the discharge port
Reversing the rotation reverses the flow through the pump
When determining shaft rotation, always look from the shaft end
of the pump Unless otherwise specified, rotation is assumed to
be clockwise (CW), which makes the suction port on the right
side of the pump The idler pin, which is offset in the pump head,
should be properly positioned toward and an equal distance
between the port connections
Electronic copies of the most current TSM issue can be found on the Viking Pump website at www.vikingpump.com
diSChArgE
idLEr piN
SuCTiON
a
b
LEfT
hANd
puMp
righT
hANd
puMp
iNSTALLATiON, STArT up, TrOubLEShOOTiNg,
prEvENTATivE MAiNTENANCE, dO’S & dON’TS