Graco 246780 Manual De Usuario

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.

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.

5. Set the air pressure to each pump at the lowest 

pressure needed to get the desired results.

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

being pumped.

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.

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.

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.

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.