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This Taskmaster valve is a unique spool-type, four-ways directional control
valve with three operators- a solenoid, a handle, and a bleeder pilot. The
solenoid permits remote operation of the valve and the handle and the bleeder
pilot operators permit operation and the valve location. Operation To operate the valve remotely, energize the solenoid to activate the
cylinder. The energized solenoid, in addition to providing pilot pressure to
operate the spool, also pressurized the small area bleeder pilot. When the
solenoid is deenergized, air is vented from the main pilot, but prevented from
being vented from the small area bleeder pilot by the ball check. The air in the
bleeder pilot acts as a return spring to return the spool to its original
position. This air may eventually leak off. Manual operation can be obtained only with a deenergized solenoid. The
bleeder pilot is used to vent any air which has not leaked off after remote
operation. After the solenoid has been deenergized and the bleeder pilot has
been vented, the manual operator can then be moved either direction to control
the cylinder.
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