Graco 312877C Operation, Pressure Relief Procedure, Starting and Adjusting the Pump

Models: 312877C

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Operation

Operation

Operation

Pressure Relief Procedure

Starting and Adjusting the Pump

Trapped air can cause the pump to cycle unexpectedly, which could result in serious injury from splashing.

1.Shut off the air supply to the pump.

2.Open the dispensing valve, if used.

3.Open the fluid drain valve to relieve fluid pressure. Have a container ready to catch the drainage.

Flush the Pump Before First Use

The pump was tested in water. If water could contaminate the fluid you are pumping, flush the pump thoroughly with a compatible solvent. See Flushing and Storage, page 15.

Tighten Fasteners Before Setup

Before using the pump for the first time, check and retorque all external fasteners. Follow Torque Instructions, page 16. After the first day of operation, retorque the fasteners.

1.Be sure the pump is properly grounded. Refer to Grounding on page 7.

2.Check fittings to be sure they are tight. Use a compatible liquid thread sealant on male threads. Tighten fluid inlet and outlet fittings securely.

3.Place the suction tube (if used) in fluid to be pumped.

NOTE: If fluid inlet pressure to the pump is more than 25% of 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 into an appropriate container.

5.Close the fluid drain valve.

6.Back out the air regulator knob, and open all bleed-type master air valves.

7.If the fluid hose has a dispensing device, hold it open.

8.Pumps with runaway protection: Enable the prime/flush function by pushing the prime/flush button on the DataTrak.

9.Slowly increase air pressure with the air regulator 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.

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312877C

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Graco 312877C Operation, Pressure Relief Procedure, Starting and Adjusting the Pump, Flush the Pump Before First Use