Graco Series D Operation, Pressure Relief Procedure, Startup and Adjustment, Hazardous Vapors

Operation

Pressure Relief Procedure

WARNING

SKIN INJECTION HAZARD

To reduce the risk of serious bodily

injury, including fluid injection or splash- ing in the eyes or on the skin, always

follow this procedure whenever you shut off the pump, when checking or servicing any part of the system, when installing or changing dispensing devices, and whenever you stop dispensing.

1.Close 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, or open the drain valve (H).

If you suspect that the dispensing valve or hose is completely clogged, or that pressure has not been fully relieved after following the steps above, very slowly loosen the hose end coupling and relieve pressure gradually, then loosen completely, then clear the valve or hose.

Startup and Adjustment

WARNING

COMPONENT RUPTURE HAZARD The maximum working pressure of each

component in the system may not be the same. To reduce the risk of overpres-

surizing any component in the system, be sure you know the maximum working pressure of each component, including the air motor and pump. Never exceed the maximum working pressure of the lowest rated component in the system. Over- pressurizing any component can result in rupture, fire, explosion, property damage, and serious injury.

To determine the fluid output pressure using the air regulator reading, multiply the ratio of the pump by the air pressure shown on the regulator gauge. For example:

6 (:1) ratio x 180 psi air =

1080 psi fluid output

6 (:1) ratio x 7 bar air = 42 bar fluid output

6 (:1) ratio x 0.7 MPa air = 4.2 MPa fluid output

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

WARNING

HAZARDOUS VAPORS

The air motor exhaust coming out of the muffler could contain harmful materials, such as oil, antifreeze, or some of the material being pumped.

1.With the air regulator (C) closed, open the bleed- type master air valves (A) or, if so equipped, join the quick disconnect coupler (M) to the male fitting

(L).

2.Open the dispensing valve (J) into a grounded metal waste container, making firm metal-to-metal contact between the container and valve.

3.Open the pump air regulator (C) slowly, just until the pump is running. When the pump is primed and all air has been pushed out of the lines, close the dispensing valve.

NOTE: When the pump is primed, and with sufficient air supplied, the pump starts when the dis- pensing valve is opened and shuts off when it is closed.

4.If your system is equipped with a runaway valve (D in Fig. 1), set it for your system configuration. See manual 308201 for instructions on setting the pump runaway valve.

5.Adjust the air regulator until you get sufficient flow from the dispensing valve. Always run the pump at the lowest speed necessary to get the desired results. Do not exceed the maximum working pressure of any component in the system.

6.If your pump accelerates quickly or is running too fast, stop it immediately and check the fluid supply. If the supply container is empty and air has been pumped into the lines, prime the pump and lines with fluid, or flush it and leave it filled with a com- patible solvent. Be sure to eliminate all air from the fluid lines. If your system has a runaway valve, reset it according to the instructions in manual 308201.

CAUTION

Never allow the pump to run dry of the fluid being pumped. A dry pump will quickly accelerate to a high speed, possibly damaging itself, and it may get very hot.

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