308149
13
Operation
(AIR-POWERED MODELS)
With the pump and lines primed, and with adequate air
pressure and volume supplied, the pump will start and
stop as the gun/valve is opened and closed. In a
circulating system, the pump will speed up or slow
down on demand, until the air supply is shut off.
Use the air regulator (F) to control the pump speed
and the fluid pressure. Always use the lowest air
pressure necessary to get the desired results. Higher
pressures cause premature tip/nozzle and pump wear.
WARNING
To reduce the risk of overpressurizing your system,
which could result in component rupture and cause
serious injury, never exceed the specified maxi-
mum incoming air pressure to the pump (see the
Technical Data
on pages 30–35)
Never allow the pump to run dry of the fluid being
pumped. A dry pump will quickly accelerate to a high
speed, possibly damaging itself. A pump runaway
valve (C), which shuts off the air supply to the pump if
the pump accelerates beyond the pre-set speed, is
available. See Fig. 3 on page 8. If your pump acceler-
ates quickly, or is running too fast, stop it immediately
and check the fluid supply. If the supply container is
empty and air has been pumped into the lines, refill the
container and prime the pump and the lines with fluid,
or flush and leave it filled with a compatible solvent. Be
sure to eliminate all air from the fluid system.
Shutdown and Care of the Pump
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
on page 12.
For overnight shutdown,
relieve the pressure
. Stop
the pump at the bottom of the stroke to prevent fluid
from drying on the exposed displacement rod and
damaging the throat packings.
Always flush the pump before the fluid dries on the
displacement rod. Never leave water or water-based
fluid in the pump overnight. First, flush with water or a
compatible solvent, then with mineral spirits. Relieve
the pressure, but leave the mineral spirits in the pump
to protect the parts from corrosion.
Fig. 5
1
Bleed hole must
face down.
104
0913A
Model 222835 Shown
2
1
34, 35
Summary of Contents for Check-Mate 2100 A Series
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