Viking Pump TSM685.2: AS-KKE 855 - Manual (Page 3)

SECTION TSM 685.2 ISSUE F PAGE 3 OF 16
FIGURE 3
RELIEF VALVE POSITION
SPECIAL INFORMATION
ROTATION: Viking Mag Drive® pumps are designed to run
in either direction. See PUMP ROTATION, page 11.
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. Relief valves are mounted as standard on the casing of
AS, AK,AL,KE and KKE size pumps.
3. If the 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 the suction side of the pump. See
Figure 3. If the pump rotation is reversed, remove
the pressure relief valve and turn end for end (see
PUMP ROTATION, page 11 for additional information.
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.
RELIEF VALVE ADJUSTING
SCREW CAP
SUCTION DISCHARGE
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.
CAUTION !
Rare earth magnets used in these couplings
have extremely strong magnetic fields capa-
ble of changing the performance or damaging
items such as the following:
• Pacemakers
• Metal implants
• Watches
• Computers and discs
• Credit cards
Completely assembled magnetic couplings
will not affect the 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 itself.