6
Tuffy Liquid Level Control with Pneumatic Switch
2.3
Preventive Maintenance
Periodic inspections are a necessary means to keep your
Magnetrol level control in good working order. This control
is a safety device to protect the valuable equipment it serves.
A systematic program of preventive maintenance should be
implemented when the control is placed into service. Based
on utilizing a preventative maintenance program and
observing the following section on “what to avoid”, your
Tuffy will provide reliable protection of your capital equip-
ment for many years.
WHAT TO AVOID
1. Use only the 2" wrench flats to install or remove the unit.
Refer to Figure 1. Use of any other surface could change the
calibration. The valve body is calibrated at the factory and
locked in place.
2. NEVER attempt to make adjustments without reading the
instructions carefully. When in doubt, consult the factory or
your local representative.
3. NEVER use in systems which have excess iron particles in
the solution. The magnet at the counterweight end of the
float can attract the particles which could cause the float rod
to jam.
2.4
Troubleshooting
If Tuffy fails to shut off or turn on inlet air:
1. Check float for full range of travel; clicking of mechanism
should be heard.
2. If the complete Tuffy mechanism operates properly when
removed from service, check to be certain that liquid is
entering the storage tank or vessel. A valve may be closed
or a pipe line clogged.
3. If the float is determined to be filled with liquid or is
collapsed, the entire level switch must be replaced. Do
not attempt to repair the float.
4. The factory calibration setting should not require any
adjustment in the field. Check to see that the unit is
installed properly with the serial number tag positioned
on the top of the unit. If the unit is still not operating
correctly, please contact the factory.
NOTE: When in doubt about the condition or performance of a
control, please contact the factory for assistance.
