Viking Pump TSM343.1: Vi-Corr Mag Drive - Manual (Page 12)

TSM 343.1 ISSUE D PAGE 12 OF 13
Pump is noisy:
1. Pump is being starved (heavy liquid cannot get to pump
fast enough). Increase suction pump size or reduce
length. If pump is above liquid, raise the liquid level to
approach the liquid level of the pump. If the liquid level is
already above pump, increase the head of liquid.
2. Pump is cavitating (liquid vaporising in suction lane).
Increase suction pipe size or reduce length. If pump is
above liquid, raise the liquid level to approach the level of
the pump. If the liquid level is already above pump,
increase the head of liquid.
3. Check alignment.
4. Anchor base or piping to eliminate vibration.
Pump not delivering up to capacity:
1. Starving or cavitating - increase suction pipe size or
reduce length.
2. Strainer particularly clogged.
3. Air lead somewhere in suction line.
4. Running too slow. Is motor the correct speed and wired
up correctly?
5. Pressure relief valve set too low, stuck open or has
damaged poppet seat.
6. Bypass line around pump partially opened.
7. Pump worn out.
Pump takes too much power (stalls motor):
1. Liquid more viscous than unit sized to handle.
2. System pressure relief valve set too high.
3. Coupling mis-aligned.
4. Bushings and / or magnetic coupling bound by hardened
product closing up operating clearances.
DO'S AND DON'TS
Do's and Don'ts for installation, operation and maintenance
of Viking pumps to assure safe, long, trouble free operation.
Installation:
1. DO install pump as close to supply tank as possible.
2. DO leave working space around the pumping unit.
3. DO use large diameter pipe with short and straight runs.
4. DO install a strainer in suction line.
5. DO a double check of alignment after unit is mounted and
piping is hooked up.
6. DO provide pressure relief valve for discharge side of
pump.
7. DO check for proper rotation as indicated on nameplate.
8. DO use piping, hose and fittings rated for maximum
system pressure.
9. DO check to make sure all guards are in place.
10. DO handle magnets with extreme caution remembering
they will attract to any ferrous objects.
Operation
1. DON'T run pump (or coupling especially) at speeds faster
than shown in catalog for that size.
2. DON'T allow pump to develop pressure higher than those
shown in catalog at that size.
3. DON'T expose pump to coupling or temperatures above
or below limits shown in catalog for that design or specific
construction.
4. DON'T operate unit without all guards in place.
5. DON'T operate pump without pressure relief valve in
discharge piping; be sure valve is mounted and set
correctly.
6. DON'T operate the pump with all the liquid bypassing
through the internal pressure relief valve or with out any
flow of liquid going through the pump for more than 30
seconds. Operate under either of these conditions may
result in a heat build up and damage to the pump or
coupling.
7. DO have spare parts, pump or complete standby unit
available, particularly if the pump is an essential part of a
key operation or process.
Maintenance:
1. DO make sure any pump that has residual system
pressure in it or that has handled high vapour pressure
liquids, has been vented through the suction or discharge
lines or other openings provided for this purpose.
2. DO make sure that if the pump is still hooked to driver
while maintenance is being performed that the driver has
been "locked out" so that it cannot be inadvertently
started while work is being done on the pump.
3. DO make sure any pump that has handled a corrosive,
flammable, vented and/or cooled before it is
disassembled.
4. DO record pump model number and serial number and
file for further use.
5. DO obtain, read and keep all maintenance instructions
furnished with pump.
PAGE 12 Of 13 ISSUE C SECTION TSM 343.1