Abstract: A simplified pneumatic door control system provides door control operations for opening, closing, stopping and reversing a door. The door control system includes as control inputs a gas source, a pneumatic motor, a first pilot valve, and pressurized manual check valves. The pressurized manually opened check valves may be used to remotely activate the control system. The control system further includes a second pilot valve, limit triggers, and a braking system. A reversing function of the control system provides the ability to reverse the direction of the door should the door encounter an obstruction upon closing. A second embodiment provides a hold to open control scheme, wherein the door travels only while a pressurized check valve is vented. Corresponding methods for controlling the door are also provided.

Abstract: A pneumatic motor control system includes a pilot valve in communication between a pneumatic gas source and a pneumatic motor and a pressurized check valve in communication with the pilot valve. The pilot valve normally rests in a neutral position that does not allow the passage of gas from the pneumatic gas source to the pneumatic motor. However, venting of the pressurized check valve shifts the pilot valve to a first position. In the first position, the pilot valve allows the passage of gas from the pneumatic gas source through the first pilot valve and to the pneumatic motor.

Abstract: A simplified pneumatic door control system provides door control operations for opening, closing, stopping and reversing a door. The door control system includes as control inputs a gas source, a pneumatic motor, a first pilot valve, and pressurized manual check valves. The pressurized manually opened check valve may be used to remotely activate the control system. The control system further includes a second pilot valve, limit triggers, and a braking system. A reversing function provides the ability to reverse the direction of the door should the door encounter an obstruction upon closing. A leading edge function further recognizes an obstruction and shifts the closing door into an open sequence. A second embodiment provides a hold to open control scheme, wherein the door travels only while a pressurized check valve is vented. Corresponding methods for controlling the door are also provided.