Graco 307707ZAP - High-Flo Series Surge Tanks User's Manual | Page 9
9
307707
Operation
All Models
Pressure Relief Procedure
WARNING
To reduce the risk of an injury from splashing fluid
or moving parts, follow the Pressure Relief Proce-
dure whenever you
Are instructed to relieve the pressure
Stop dispensing
Check or service any of the system equipment
Install or clean any system components
1.
Turn off the power to the pump.
2.
In a hydraulic system, close the hydraulic shutoff
valves.
3.
In an air-powered system, close the pump air
regulator, and close the bleed-type master air
valve (required in your system).
4.
Close the fluid shutoff valves from the supply
tanks.
5.
Hold a metal part of the gun firmly to the side of a
grounded metal pail and trigger the gun to relieve
fluid pressure.
6.
Open the fluid drain valve (required in your
system), having a container ready to catch the
drainage. Keep hands away from the end of the
drain valve when opening it.
7.
Leave the drain valve open until you are ready to
use the system again.
8.
For Models 238983, 238984, 238985, 238986,
238987, 238988, 218509, and 220157: To relieve
the gas charge pressure in the surge tank, remove
the cap on the charge valve (6), and press down
on the valve stem until all pressure is relieved.
NOTE: Relieving all gas pressure takes several
minutes.
For Model 233736: Back out the plug (11) to
relieve air pressure in the surge tank.