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What is the difference between this and a pressure vacuum breaker (PVB)
Maintains consistent electromagnetic force for reliable valve seating and refrigerant flow regulation
since Trane and American Standard share many internal components
What is the difference between the red spring and other colors for the 243-12
Cleveland Controls DDP-109-202 Switch Els PW 17895 What is the difference betweenThe Cleveland Controls DDP 109 202 Dual Pressure Sensing Switch is an essential component for high accuracy HVAC air pressure monitoring and energy management systems. This general purpose proving switch features two independently adjustable SPDT snap acting switches mounted on a common foot bracket, allowing for a versatile adjustable deadband in complex control circuits. With a set point range of 0. 05" wc to 2. 0" wc, the DDP 109 202 is engineered
