Graymills DDP 1' Pump OMI - Manual (Page 11)

11
Operation
Pressure Relief Procedure
PRESSURIZED EQUIPMENT HAZARD
The equipment stays pressurized until pressure is manu-
ally relieved. To reduce the risk of serious injury from
pressurized fluid, accidental spray from the gun 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
WARNING
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,
having a container ready to catch the drainage.
Flush the Pump Before First Use
The pump was tested in water. If the water could contami-
nate the fluid you are pumping, flush the pump thoroughly
with a compatible solvent. Follow the steps under Starting
and Adjusting the Pump.
Starting and Adjusting the Pump
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.
Do not lift a pump under pressure. If dropped, the fluid
section may rupture. Always follow the Pressure Relief
Procedure above before lifting the pump.
WARNING
1. Be sure the pump is properly grounded. Refer to
Grounding on page 5.
2. Check all fittings to be sure they are tight. Be sure to
use a compatible liquid thread sealant on all male
threads. Tighten the fluid inlet and outlet fittings
securely. Retorque all fasteners before startup.
3. Place the suction tube (if used) in the fluid to be
pumped.
NOTE: If the fluid inlet pressure to the pump is more than
25% of the outlet working pressure, the ball check valves
will not close fast enough, resulting in inefficient pump
operation.
4. Place the end of the fluid hose (L) into an appropriate
container.
5. Close the fluid drain valve (J). See Fig. 2.
6. With the pump air regulator (C) closed, open all
bleed-type master air valves (B, E).
7. If the fluid hose has a dispensing device, hold it open
while continuing with the following step.
8. Slowly open the air regulator (C) until the pump starts
to cycle. Allow the pump to cycle slowly until all air is
pushed out of the lines and the pump is primed.
If you are flushing, run the pump long enough to
thoroughly clean the pump and hoses. Close the air
regulator. Remove the suction tube from the solvent
and place it in the fluid to be pumped.