ACTUATORS
• Electric
• Pneumatic
• Hydraulic
• Electro-hydraulic

VALVES
• Control
• Butterfly
• Ball and Gate
• Plug

POSITIONERS
• Pneumatic
• Electric Pneumatic

LIMIT SWITCHES

MANUAL VALVE GEARING
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Pneumatic Positioners

Positioner: an instrument attached to a pneumatic valve actuator, providing accurate, automatic modulating control of the valve between the open and closed positions by increasing, decreasing, and balancing the air supply to the actuator as determined by a varying input signal generated by an external instrument source. While the operation positioners may vary, the basic function will be either the pneumatic positioner, designed to receive a 3 to 15 PSI signal, or the electro-pneumatic, designed to receive a 4 to 20 milliamp signal.