Graco Inc D 5 D Operation, Pressure Relief Procedure, Flush Pump Before First Use, Pump Shutdown

Operation

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

DAre instructed to relieve pressure

DStop pumping

DCheck, clean, or service any system equipment

DInstall 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 pres- sure, and have a container ready to catch the drainage.

Flush Pump Before First Use

The pump was tested with water. Prior to first use, flush the pump thoroughly with a compatible solvent.

Reactor feed pumps, part numbers 246484, 246485, and 257447, were tested with lightweight oil, which is left in the fluid passages. To avoid contaminating your fluid with oil, flush the pump with a compatible solvent before using the equipment. Follow the steps under

Starting and Adjusting Pump.

Starting and Adjusting Pump

1.	Read Toxic Fluid Hazard
	on page 3.

2.If lifting the pump, follow the Pres-

sure Relief Procedure above.

	Be sure the pump is
3.	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.

10 308981

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 appro- priate container.

7.Close the fluid drain valve (H).

8.With the pump air regulator (G) closed, open all bleed-type master air valves (B, E).

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.

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. 2 and Parts Drawings. Follow preceding steps 1 through 8 of Starting and Adjusting Pump.

2.Open air regulator (G).

WARNING

The pump may cycle once before the external sig- nal 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 occurring.

Pump Shutdown

At the end of the work shift, relieve the pressure as described in Pres- sure Relief Procedure at left.