40 |
P a g e
Figure 20:
Air compressor (top view, cover off)
Solenoid valves
The solenoid valves turn the pneumatic valves on/off based on signals
from the control system. The solenoid valves are grouped in four
manifolds. Color‐coded air lines facilitate troubleshooting. The manifolds
are mounted in four enclosures and control the following:
Pneumatic actuators, cylinders or rotary actuators that turn on or
off the spray nozzles (individuals or gangs) on the front spray bars
and ball valves that turn on/off the rear spray bars.
Emulsion tank valves (one valve on each tank for drawing
emulsion and another valve on each tank for returning emulsion).
Pneumatic ball valves in the pumping station.
Note:
If air pressure is lost for any reason, including
compressor malfunction, the pneumatic valves will no longer
operate and will remain in their last position.
Note:
If electrical signal to the valve is lost, the valve can be
manually operated by turning the screw with a flat‐tipped
screwdriver.
