Graco 239877 Series D, 239888 Series D Operation, Pressure Relief Procedure, Start Up

Operation

Pressure Relief Procedure

Follow the Pressure Relief Procedure whenever you see this symbol.

This equipment stays pressurized until pressure is manually relieved. To help prevent serious injury from pressurized fluid, such as skin injection, splashing fluid and moving parts, follow the Pressure Relief Procedure when you stop spraying and before cleaning, checking, or servicing the equipment.

1.Close the pump air regulator and bleed-type master air valve (required in the system).

2.Hold a metal part of the dispensing valve firmly to a grounded metal waste container and trigger the valve to relieve the fluid pressure.

Start Up

1.If there are multiple pumps on the air line, close the air regulators and bleed-type master air valves to all but one pump. If there is only one pump, close its air regulator and bleed-type master air valve.

2.Open the master air valve from the compressor.

3.Open the dispensing valve into the grounded metal waste container, making firm metal-to-metal contact between the container and valve. Open the bleed-type master air valve and open the pump air regulator slowly, just until the pump is running. When the pump is primed and all air has been pushed out of the lines, close the dispense valve.

4.If there is more than one pump, repeat this proce- dure for each pump.

NOTE: When the pump is, and with sufficient air sup- plied, the pump starts when the dispensing valve is opened and shuts off when closed.

5.Set the air pressure to each pump at the lowest pressure needed to get the desired results.

Operation

NOTICE

The pump has a rated ratio of 50:1. However, it is capable of reaching stall pressures equal to 60 times the air input pressure. Calculate the fluid output pressure using the air regulator reading. Multiply the air pressure shown on the regulator gauge by 60. For example:

140 psi air x 60 = 8400 psi fluid output

0.97MPa air x 60 = 58.2 MPa fluid output

9.7bar air x 60 = 582 bar fluid output

Regulate air to the pump so that no air line or fluid line component or accessory is over pressurized.

6.Never allow the pump to run dry of the material being pumped.

NOTICE

A dry pump will quickly accelerate to a high speed, possibly damaging itself. If your pump accelerates quickly, or is running too fast, stop it immediately and check the material supply. If the supply container is empty and air has been pumped into the lines, prime the pump and lines with material, or flush it and leave it filled with a compatible solvent. Be sure to eliminate all air from the material lines.

NOTE: A pump runaway valve (G) can be installed on the air line to automatically shut off the pump if it starts to run too fast.

7.Read and follow the instructions supplied with each components in the system.

8.To shut off the system always follow the Pressure Relief Procedure.

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