| 摘要 |
A direct operated valve assembly is provided including a valve body having a pressurized inlet port in communication with a source of pressurized air, a cylinder port, a valve bore extending axially within the valve body, and a valve member supported within the valve bore and movable between predetermined positions within the valve bore to selectively direct pressurized air from said inlet port through the cylinder port. An actuator is also included that is mounted to the valve body for moving the valve member in a first direction and a biasing member disposed between the valve member and the valve body to provide a biasing force to the valve member in an opposite direction. Also, an air-assist passage is included for providing a source of pneumatic pressure that acts in combination with the biasing member to operatively move the valve member in a direction opposite to the movement induced by the actuator.
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