The Johnson Controls V47AB-5 Temperature Actuated Valve 1/2" 75°F–135°F is a self-operating temperature control valve designed to regulate water flow based on changing temperatures in HVAC and industrial cooling systems. It works by automatically opening or closing the valve as the sensing element responds to temperature variations, maintaining consistent operating conditions without ... https://www.partshnc.com/v47ab-5-johnson-controls-12-tempactuated-vlv-75135f