Operation; Pressure Relief Procedure; Flush The Equipment - Graco G-Chem Series Instructions And Parts

Operation

Operation
To avoid injury due to unexpected moving parts,
remove power to the pumpjack and wait for the walk-
ing beam to stop moving before performing any task
on the G-Chem pump. The G-Chem pump is directly
influenced by the motion of the pumpjack's walking
beam, and the pump is inactive only when the walking
beam is unable to move.

Pressure Relief Procedure

Follow the Pressure Relief Procedure whenever
you see this symbol.
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.
NOTE: Always discharge fluid into an approved con-
tainer or location.
1. Remove power to the pumpjack and wait for the
pumpjack to stop moving.
2. Shut off the inlet (E) and outlet (F) lines using shut-
off valves (L). See F
3. Slowly loosen the fitting connected to the outlet
check valve (216) to relieve downstream fluid pres-
sure. See F . 3 on page 8.
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4. Open the bleed needle (211) on the end of the
pump cylinder (201) to relieve internal pump pres-
sure.
5. Disconnect and cap the inlet (E) and outlet (F) fluid
lines.
12
. 3 on page 9.
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Flush the Equipment

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.
• Check fittings for leaks and tighten as necessary.
• Flush with a fluid that is compatible with the fluid
being dispensed and the equipment's wetted parts.
1. Follow the Pressure Relief Procedure.
2. Disconnect lever arm (122) from the pumpjack.
3. Connect the inlet check valve (215) to the supply
source of the flushing fluid. See F
4. Connect the outlet check valve (216) to a waste res-
ervoir.
5. Operate the lever arm (122) by hand until the dis-
pensed fluid is predominantly flushing fluid.
6. Follow the Pressure Relief Procedure.
7. Reconnect the lever arm (122) to the pumpjack.
Refer to Pumpjack Connections, page 10.
. 3 on page 8.
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