Operation, Pressure Relief Procedure

Operation

Pressure Relief Procedure

The equipment stays pressurized until pressure is man- ually relieved. To reduce the risk of serious injury from pressurized fluid, fluid from the valve, or splashing fluid, follow this procedure whenever you:

•are instructed to relieve pressure

•stop dispensing

•check, clean, or service any system equipment

•install or clean dispensing devices.

1.Close the pump air regulator and the bleed–type master air valve (required in your 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.

Startup

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 a grounded metal waste container, making firm metal–to–metal con- tact 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 you have more than one pump, repeat this proce- dure for each pump.

When the pump is primed, and with sufficient air supplied, the pump starts when the dispensing

valve is opened and shuts off when it is closed.

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

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 out- put pressure using the air regulator reading. Multi- ply the air pressure shown on the regulator gauge by 60. For example:

140 psi air x 60 = 8400 psi fluid output) (0.97 MPa air = 58.2 MPa fluid output

99.7 bar air x 60 = 582 bar fluid output

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

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

CAUTION

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.

A pump runaway valve 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 component in your system.

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

309966H

246909 Series C, 246780 Series C, 246781 Series C, 253361 Series C specifications

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