Valve actuator

A selector valve system for selectively operating a motor for selectively actuating a main line valve on a pipeline, the motor powered by fluid flowing therethrough, gas flowing through the pipeline, the system comprising:

• a body;
• a first poppet valve mounted in a first channel through the body, the first channel in fluid communication with the motor;
• a second poppet valve mounted in a second channel through the body, the second channel in fluid communication with the motor;
• a first limit valve for controlling flow of a portion of the gas to the first poppet valve;
• the first limit valve and the second limit valve normally open permitting gas flow to bias the first poppet valve and the second poppet valve, respectively, closed;
• bypass means interconnected with the first poppet valve for selectively activating the first poppet valve to an open position to permit gas flow to the motor to power the motor to open the main the line valve;
• and
• the bypass means interconnected with the second poppet valve for selectively activating the second poppet valve to an open position to permit gas flow to the motor to power the motor to close the main line valve.