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All Pumps
Install the air line accessories in the approximate order
shown in the
Typical Installation drawing.
A pump
runaway valve
(6)
senses when the pump
is
running too
fast and shuts
off the air supply to the motor. For
automatic air
motor lubrication, install
an air line
lubricator (Dl.
(For manual lubrication,
see
air valve (A) within easy reach of the pump. Install an air
MAINTENANCE, page 6 . ) Install the bleed-type master
speed. An air line filter. (C) removes harmful dirt and
regulator (E) to control air to the
motor and
pump
moisture from your compressed air supply.
On the fluid line, install
a
drain valve (HI close to the
fluid outlet to assist in relieving fluid pressure (not re-
quired with pumps having
a
Relax-A-Valve). Connect
a
suitable, grounded fluid hose and spray gun or dispens-
ing valve to the pump's 314 in. npt outlet.
Grounding
Proper grounding is essential to maintain
a
safe system.
Read FIRE OR EXPLOSION HAZARD on page 3,
then ground the pump and system as explained in that
section.
Be sure the air supply hose is properly grounded, and is
at least 112 in. (13 mm) ID in order to supply an ade-
quate volume of air to the motor.
OPERATION
The was
tested in oil, and some
oil was left in the
Startup
pump to'protect it from corrosion. If the oil will con-
taminate the fluid you are pumping, flush it out.
To
start
the pump, close the fluid drain valve (HI. Open
the bleed-type master air valves (A). Holding a metal
part of the spray gunldispensing valve firmly against
the side of a grounded metal pail, hold the trigger open
while slowly opening
the air regulator (El.
Run the
pump slowly until all air is purged from the gunlvalve.
plicable).
Release the trigger and engage the safety latch lif ap-
Use the air regulator
(E)
to control fluid pressure and
pump speed. Always use the lowest pressure necessary
to get the desired results. Higher pressures cause
premature pump wear and spray tip wear, and usually
do not improve the spray pattern.
I
W A R N I N G
To reduce the risk of overpressurizing you system,
.
which could result in component rupture and
cause serious bodily injury,
NEVER exceed the
maximum working pressure of the lowest rated
component in your system. Lowering
the air
Dressure to the motor will Drooortionatelv lower
ihe fluid outletpressure from the pump. Refer to
EQUIPMENT MISUSE HAZARD. Svstem
pressure, for the maximum air and fluid working
Dressure of this oumb
supplied to the motor, the pump starts when the gun or
In a direct supply system, with adequate air pressure
dispensing valve is opened, and stalls against pressure
when
it
is closed.
stop
it
immediately. Check the fluid supply and refill it if
If the pump accelerates quickly or is running too fast,
necessary. Prime the pump to remove all air from the
system, or flush the pump, relieve pressure, but leave
the system filled with mineral spirits or an oil-based sol-
vent to protect the pump from corrosion.
NOTE:
A pump runaway valve
(6)
can be installed
on the air line to automatically shut off the
pump if
it
starts to run too fast.
Shutdown and Care of the Pump
Always stop the pump at the bottom of
its
stroke to pre-
vent fluid from drying on the rod
and damaging the
throat packings.
WARNING
checking, or repairing any part of the system, to
page 2 whenever you stop spraying and before
flush the system with
a
compatible solvent as often as
If you are pumping fluid which dries, hardens or sets up,
necessary to prevent a build up of dried fluid in the
pump or hoses.
Using the Relax-A-Valve
If your pump has a Relax-A-Valve,
it
can be used to mix
fluid by circulation (except in inductor-type follow plate
installations), and
it
can be set
to relieve fluid line
pressure each time the pump air pressure is relieved.
To circulate
fluid, open the Relax-A-Valve by loosening
the locknut (119) and turning the T-handle screw (110)
counterclockwise as far as possible. Start the pump and
circulate the fluid as necessary.
Stop the pump and
tion. See Fig 2.
close the Relax-A-Valve or set
it
in the automatic posi-
To set the automatic position, loosen the locknut (1 191
and turn the T-handle screw (1101 clockwise as far a5
tighten the locknut. During normal operation, the fluid
possible. Back off the T-handle screw four turns and
pressure is relieved automatically
each time the air
pressure to the pump is relieved.
NOTE:
If your installation includes
an Evenflo
pressure regulator, air
to the pump
is
automatically relieved each time you close
the gun trigger, and
the Relax-A-Valve, in
turn, relieves fluid pressure.
Without an Evenflo, the bleed-type master
air valve (A) should be used to relieve pump
air Dressure.
'Fig 2
-
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