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Pressure Relief Procedure
WARNING
PRESSURIZED EQUIPMENT HAZARD
The equipment stays pressurized until pressure is
manually relieved. To reduce the risk of serious
injury from pressurized fluid, accidental spray, or
splashing fluid, follow this procedure whenever you:
D Are instructed to relieve pressure
D Stop pumping
D Check, clean, or service any system equipment
D Install or clean fluid nozzles
1. Shut off the air to the pump.
2. Open the dispensing valve, if used.
3. Open the fluid drain valve to relieve all fluid
pressure, and have a container ready to catch the
drainage.
WARNING
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can
cause serious injury or death if splashed
in the eyes or on the skin, inhaled, or
swallowed.
D Read TOXIC FLUID HAZARD on page 3.
D Use fluids and solvents that are compatible with
the equipment wetted parts. Refer to the
Technical Data section of all equipment
manuals. Read the fluid and solvent
manufacturer's warnings.
WARNING
FIRE AND EXPLOSION HAZARD
Never pump flammable fluids with
polypropylene units. Such use could
cause a fire or an explosion.
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Operation
Operating Instructions
See Parts Drawing on page 13.
D When compressed air is applied to the pump and
the leak detector, the pump operates as it would
under normal operating conditions. Exhaust air
from the pump flows into the leak detector and out
of the leak detector silencer (R). See the Parts
Drawing on page 13.
D If the pump diaphragm leaks, liquid may enter the
pump's air exhaust and be carried to the leak
detector. When liquid accumulates in the leak
detector, the float (4) rises, and air flow is diverted
to a different hose in the the three-way valve (M).
As a result, air pressure is removed from the
shut-off valve (1), which closes it and stops the
pump.
When the leak detector triggers a pump shutdown, you
should suspect that a pump diaphragm has failed, and
you should respond as follows:
1. Shut off all air to the pump and the leak detector.
2. Shut off the fluid supply to the pump.
3. Drain the liquid from the leak detector through the
drain valve (B) into a suitable container, depending
on the liquid being pumped.
4. If the liquid that comes out of the drain valve (B) is
only water condensation, no corrective action is
necessary. Close the drain valve, open the fluid
supply line, and resume pumping.
If the liquid being pumped comes out of the drain
valve (B), repair the pump immediately to minimize
internal damage to the pump. Additionally, the
leak detector must be serviced. See Cleanup
After a Leak.
Cleanup After a Leak
If a spill occurs with tacky or viscous fluid, the fluid
could solidify and interfere with the action of the
moving parts. It is recommended that you check the
following parts for cleaning or replacement any time
the leak detector is activated (See Parts Drawing on
page 13):
D Concentrator (3)
D Float (4)
D Push rod (5)
D Compression nut (6)
D Converter o-ring (12)
D Drain valve (B)
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