Pneumatic Dispense Valve Control - Graco DC12 Operation & Setup

Priming System
Machines equipped with Performance
Monitor Plus Cont.
8. Select the Run Mode Screen. At this time
the Green Pilot light on the Pendant station
is illuminated. Refer to Fig. 28
9. Place containers under A and B ratio valves.
10. Press the Start Dispense button on the
Pendant Station. A1 and B1 Supply Rams
will begin to pump. Let machine pump until
both A and B material flows out of the ratio
valves. Hit the Stop button located on the
Pendant Station. Refer to Fig. 28
11. Perform Ratio Check Procedure before
normal operation. (See Ratio Check
Procedure in this Manual.)
Prime system until both materials are
air free before starting normal production.
40
Machines equipped with

Pneumatic Dispense Valve Control

Refer to Fig. 21
Automatic Ratio Valve
Refer to Fig. 26
1. Remove lower dispense block and mixer
before priming system.
Manual Ratio Valve
Refer to Fig. 27
1. Remove Outlet Mix Block and Mixer before
priming system. Install Manual Ratio
Assembly.
2. Reduce pressure on air motor regulators
(BE) to:
A1 Supply Ram 40 psi (.28 Mpa, 2.8 bar)
B1 Supply Ram 30 psi (.21 Mpa, 2.1 bar)
Refer to Fig. 24
Automatic Ratio Valve
Refer to Fig. 26
3. From the Dispense Valve Control Station
select A FEED PUMP AUTO, B FEED
PUMP AUTO, and DISPENSE POINT
RATIO. Refer to Fig. 21
Manual Ratio Valve
Refer to Fig. 27
3. From the Dispense Valve Control Station
select A FEED PUMP AUTO, B FEED
PUMP AUTO, and DISPENSE POINT MIX.
Refer to Fig. 21
Manual Ratio Handle should be in the
open position.
4. Place containers under A and B ratio valves.
5. Select DISPENSE ON. A1 and B1 Supply
Rams will begin to pump. Let machine
pump until both A and B material flows out
of the ratio valves. Select DISPENSE OFF
when system is primed.
6. Perform Ratio Check Procedure before
starting production. (See Ratio Check
Procedure in this Manual.)
312767B