American Dryer Corp. AD-400 User Manual
Page 35
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2. Tilting-Piston Solenoid Valves
A two-way-tilt dryer has two (2) of these solenoid valves - one to control the front set of tilting pistons
and a second to control the rear set of tilting pistons. A one-way-tilt dryer has only one (1) tilting
solenoid valve.
Each valve has five (5) 3/8-inch FPT ports and two (2) electric solenoids, one on each side of the valve.
To tilt the dryer back, a 115-volt signal is applied to the Front Pistons solenoid connector #12, and no
voltage is applied to solenoid connector #14. The internal spool in the valve will move and 80 psi of air
will enter the bottom port of the front tilting pistons, extending the front tilting piston rods and tilting the
dryer back for loading. The top piston ports are bled to the atmosphere.
To levd the dryer after loading, the voltage sigirais are reversed. No voltage is applied to the "12”
solenoid, and 115 volts is applied to the '14” solenoid. The valve spool will now move so that 80 psi of air
is applied at the top piston ports, while the bottom piston ports are bled to the atmosphere. The piston
rods will now retract, leveling the dryer. On two-way-tilt dryers, the rear tilting piston solenoid valve acts
in the same manner.
PNEUMATIC CONTROL PANEL
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