Graco 246780 Manuale Utente

Three accessories are required in your system: an air 
shut-off valve/air bleed device, fluid drain valve, and 
ground wire. These accessories help reduce the risk of 
serious bodily injury, including skin injection, splashing 
in the eyes or on the skin, injury from moving parts if you 
are adjusting or repairing the pump, and explosion from 
static sparking.

•

The air bleed device relieves air trapped between it 
and the air motor after the air supply is shut off. 
Trapped air can cause the air motor to cycle unex-
pectedly, causing serious injury if you are adjusting 
or repairing the pump. Use a bleed-type master air 
valve (J), installed near the pump air inlet within 
easy reach from the pump.

•

The fluid drain valve (K) assists in relieving fluid 
pressure in the displacement pump, hoses, and dis-
pensing valve. Triggering the valve to relieve pres-
sure may not be sufficient.

•

The ground wire (B) reduces the risk of static spark-
ing.

1. Install a pump runaway valve (G) to shut off the air 

to the pump if the pump accelerates beyond the 
pre-adjusted setting. A pump that runs too fast can 
be seriously damaged.

2. Install an air line lubricator (F) for automatic air 

motor lubrication.

3. Install a bleed-type master air valve (J) to relieve air 

trapped between the valve and the motor. Order 
Part No. 107142.

4. Install an air regulator (C) to control pump speed 

and pressure.

5. Install an air line filter (E) to remove harmful dirt and 

contaminants from your compressed air supply.

6. Install a second bleed-type master air valve (J) 

upstream from all other accessories, to isolate the 
accessories for servicing.

Do not hang the air accessories directly on the air 
inlet. The fittings are not strong enough to support the 
accessories and may cause one or more to break. 
Provide a bracket on which to mount the accessories.

Install the air line accessories in the order shown in 
F

. 2.

0 4 1 9 1 C

A

B

C

D

E

F

G

H

J

K

J

Recommended air line 
configuration to reduce 
moisture in pump

KEY
A Fluid dispense line
B Pump ground wire (required)
C Air regulator with gauge
D Main air supply line
E Air line filter
F Air line lubricator
G Pump runaway valve
H Follower plate
J Bleed-type master air valves

(required)

K Fluid drain valve

1/2 in.