Graco Python A25011, Instructions - Parts Manual

Page: 17 / 58

Operation
3A4386E 17
Operation
Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
NOTE: Always discharge fluid into an approved con-
tainer or location.
1. Shut off all fluid and air lines (A, K, & P) using shut-
off valves (H).
2. Disconnect air supply lines (A).
3. Disconnect timing valve (22) to vent internal trapped
pressure.
4. Use a flathead screwdriver to turn the prime/bleed
valve (20) slowly counter-clockwise to relieve pres-
sure. (Use a hex wrench for PCI-xxx-xxH pumps.
See Configuration Number Matrix, page 4.)
5. Slowly disconnect fluid lines (K & P) from check
valves (L & M).
6. Reconnect timing valve (22).
Flush the Equipment
• Flush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted parts.
1. Follow the Pressure Relief Procedure.
2. Connect inlet to the supply source of the flushing
fluid.
3. Connect outlet to a waste reservoir.
4. Run the pump until the dispensed fluid is predomi-
nately flushing fluid.
5. Follow the Pressure Relief Procedure.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection and splashing
fluid, follow the Pressure Relief Procedure when
you stop dispensing and before cleaning, checking, or
servicing the equipment.
F
IG
. 3 Disconnect timing valve
22
8
20
To avoid fire and explosion, always ground equipment
and waste container. To avoid static sparking and
injury from splashing, always flush at the lowest pos-
sible pressure.