Pneumatic temperature reset differential pressure controller

摘要: Abstract of the Disclosure An air flow velocity controller in a variable volume control system interlocks room temperature signal from thermostat with set point so that maintains constantly regulated amount into proportion to room's demands and independent variations static pressure duct. The includes maximum lift cam movable spring fulcrum which are both mounted common housing permit setting be adjusted for varying requirements while main-taining constant range regardless setting. is constructed provide auto-matic compensation offset produced by changes ability at minimum can economically reheated or maintained ventilation requirements.