Graymills DDP .5' Pump - Manual (Page 10)

10
Operation
Pressure Relief Procedure
WARNING
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, or splashing fluid,
follow this procedure whenever you
Are instructed to relieve pressure
Stop pumping
Check, clean, or service any system equipment
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.
Flush Pump Before First Use
The pump was tested in water. Prior to use, flush the
pump thoroughly with a compatible liquid. Follow the steps
under Starting and Adjusting Pump.
Starting and Adjusting Pump
1.
Read HAZARD FLUIDS on
page 2.
2.
If lifting the pump, follow the Pressure
Relief Procedure above.
3.
Be sure the pump is
properly grounded.
Read Fire and
Explosion Hazard
on page 3.
4. Check all fittings to be sure they are tight. Use a
compatible liquid thread sealant on all male threads.
Tighten the fluid inlet and outlet fittings snugly. Do not
overtighten the fittings into the pump.
5. Place the suction tube (if used) in the fluid to be
pumped.
NOTE: If the inlet fluid 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.
6. Place the end of the fluid hose (K) into an appropriate
container.
Refer to Figure 1 on page 5.
7. Close the fluid drain valve (H).
See Fig. 1.
8. With the pump air regulator (G) closed, open all
bleed-type master air valves (B, E).
See Fig. 1.
9. If the fluid hose has a dispensing device, hold it open
while continuing with the following step. Slowly open
the air regulator (G) 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.
See Fig.1.
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.
Operation of Remote Piloted Pumps
1. Fig. 1 and Parts Drawings. Follow preceding steps 1
through 8 of Starting and Adjusting Pump.
2. Open air regulator (G).
See Fig. 1.
WARNING
The pump may cycle once before the external signal is
applied. Injury is possible. If pump cycles, wait until
end before proceeding.
3. Pump will operate when air pressure is alternately
applied to push type connectors (16).
NOTE: Leaving air pressure applied to the air motor for
extended periods when the pump is not running may
shorten the diaphragm life. Using a 3–way solenoid valve
to automatically relieve the pressure on the air motor when
the metering cycle is complete prevents this from occur-
ring.
Pump Shutdown
At the end of the work shift, relieve the
pressure as described in Pressure
Relief Procedure at left.