8
Operation
Wrap the PTFE sealing tape supplied around the fitting thread (to
eliminate any possible leakage) and assemble into the port.
DO NOT
OVERTIGHTEN!
Use only a single turn of tape—hand tighten—then give
one more turn with a wrench. Instead of the standard fittings supplied with
the pump, any other appropriate system can be attached to the pump.
CAUTION:
Do not operate pump when pressure ports of both heads are
in a blocked condition.
A muffler can be used at the outlet to decrease the noise level if desired.
Usually, three feet lengths of tubing at both ends is more than adequate for
quiet operation. If the air or gas being pumped is relatively dirty, use of an
air filter is desirable. Otherwise, excessive amounts of dust and other par-
ticles will collect at the valve seats. This may interfere with the proper seat-
ing of the valves and will decrease flow, pressure and vacuum characteris-
tics and may make the flow values erratic.
Sudden changes in the diameter of system tubes, fittings, bends and other
obstructions will increase pressure and/or vacuum in the system and will
decrease the available flow. Intentional reduction in flow can be achieved
by a simple valve or pinching of the tube at inlet (preferred for the
diaphragm life) or outlet systems.
WARNING:
Gas under pressure should not be used for supply as a
hazardous bursting condition could develop in the Pump
Head. Use only gases contained at atmospheric pressure.
The motor is supplied with an internal thermal overload switch which may
trip if something happens to the pump. If this should occur, check the pump
to ensure that everything is normal. Allow motor to cool for approximately
30 minutes, then restart. If overload trips again, return the complete unit to
your dealer for repair.
DANGER:
Unplug power cord before any cleaning operation is started.
When the pump is not in use, store in a clean, dry area. If ports on pump
are open, cover to keep dust and dirt from entering. Wipe power cord
down with dry towel and inspect for cracks in insulation after each use.
Have cord repaired, if found defective, prior to reusing.
Summary of Contents for 420-1901
Page 2: ...2 ...
