Viking 823 - Manual (Page 3)

SECTION TSM 845.1 ISSUE C PAGE 3 OF 13
fIGURE 3
SPECIAL INfORMATION
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.
ROTATION: Viking Mag Drive ® pumps are directional.
Shaft rotation determines which port is suction and which is
discharge. The port located where pumping elements (gear
teeth) come out of mesh is the suction port. Do not attempt
to operate the pump in the opposite direction. See PUMP
ROTATION on 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. Do not rely on decoupling of magnets for
protection from over pressure; this may result in damage
to the magnets, pump, or other equipment.
2. If pump rotation is to be reversed during operation,
pressure protection must be provided on both sides of
the pump.
3. The relief valve adjusting screw cap must always point
towards the suction side of the pump. Refer to figure 3. If
the pump rotation is reversed, remove the pressure relief
valve and turn end for end (see PUMP ROTATION on
page 7 first for additional steps required for proper
operation.)
4. 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.
CAUTION !
Rare earth magnets used in these
couplings have extremely strong
magnetic fields capable of changing the
performance or damaging items such as
the following:
Pacemakers
Metal Implants
Watches
Computers & discs
Credit Cards
Completely assembled magnetic
couplings will not affect items listed
above.
Altered performance or damage can
occur only when the coupling halves are
separated.
There are no known harmful effects of
these magnetic fields on the human
body.
SUCTION
DISCHARGE
RELIEf VALVE ADJUSTING SCREW CAP
MAINTENANCE