Viking Pump TSM445: LVP Vane Pumps - Manual (Page 3)

SECTION TSM 445 ISSUE C PAGE 3 OF 11
ROTATION: Viking LVP pumps are clockwise rotation (from
shaft to end) standard, but they operate well in a clockwise or
counterclockwise rotation, with some simple rearrangement of
parts. The relief valve and internal plugs must be rearranged
for counterclockwise rotation. See “Special Requirements
for Reverse Rotation” details on page 7.
Shaft rotation determines which port is suction and which
is discharge. Viking LVP pumps have internal casing/head
lubrication lines. Ensure these lines are setup correctly prior
to operation. See “Assembly” section, page 7.
PRESSURE RELIEF VALVES:
1. Viking pumps are positive displacement pumps and
must be provided with some sort of pressure protection.
This may be a relief valve mounted directly on the pump,
an inline pressure relief valve, a torque-limiting device,
or a rupture disk, or other method.
2. There are relief valve options available on those pump
models designed to accept a relief valve. Options may
include a return to tank relief valve.
NOTE: Pump can be operated in reverse direction for
short duration at low differential pressure to clean/flush
out lines.
3. If pump rotation is to be reversed during operation,
pressure protection must be provided on both sides
of the pump.
4. The relief valve adjusting screw cap must always
point towards suction side of pump. If pump rotation
is reversed, remove pressure relief valve and turn end
for end or use external pressure relief means.
5. Pressure relief valves cannot be used to control pump
flow or regulate discharge pressure.
For additional information on pressure relief valves, refer
to Technical Service Manual TSM000 and Engineering
Service Bulletin ESB-31.
SPECIAL INfORMATION
MAINTENANCE
DANgER !
Before opening any Viking pump liquid
chamber (pumping chamber, reservoir,
relief valve adjusting cap fitting, etc.)
Be sure:
1. That any pressure in the chamber has
been completely vented through the
suction or discharge lines or other
appropriate openings or connections.
2. That the driving means (motor,
turbine, engine, etc.) has been “locked
out” or made non-operational so that
it cannot be started while work is
being done on pump.
3. That you know what liquid the
pump has been handling and the
precautions necessary to safely
handle the liquid. Obtain a material
safety data sheet (MSDS) for the
liquid to be sure these precautions
are understood.
failure to follow above listed
precautionary measures may result in
serious injury or death.
Series LVP pumps are designed for long, trouble-free service
life under a wide variety of application conditions with a
minimum of maintenance. The following points will help
provide long service life.
Pumps that are mounted directly to the motor will need to be
removed from the mounting bracket to perform mechanical
seal maintenance or replacement.
CLEANING PUMP: Keep the pump as clean as possible.
This will facilitate inspection, adjustment, and repair work.
STORAGE: If pump is to be stored, or not used for six
months or more, the pump must be drained and a light coat
of light oil must be applied to all internal pump parts.
Apply grease to the pump shaft extension. Viking suggests
rotating pump shaft by hand one complete revolution every
30 days to circulate the oil. Tighten all pump assembly bolts
before putting the pump in service after being stored.
SPECIAL MECHANICAL SEALS:
Extra care should be taken in the repair of these pumps.
Be sure to read and follow all special instructions supplied
with your pump.
SUGGESTED REPAIR TOOLS: The following tools must be
available to properly repair series LVP pumps. These tools
are in addition to standard mechanics’ tools such as open-
end wrenches, pliers, screwdrivers, etc. Most of the items
can be obtained from an industrial supply house.
1. Soft headed hammer
2. Allen wrenches (some mechanical seals and set
collars)
3. Brass bar
4. Arbor press