Ideal for commercial use, this high-performance Danfoss RA 2000 built-in temperature sensor uses frictionless bellows which are charged with a liquified gas. The sensor operates by sensing the state change from liquid to gas due to temperature increases, modulating the valve to a closed position. The gas condenses back to liquid as the temperature reduces, causing a spring within the sensor to open the valve until the bellows pressure and spring pressure are equal, and the valve cone is stationary. Known as a saturated vapour pressure sensor, this system offers a low thermal mass for faster reaction times as well as a defined sensor location at the coolest part of the bellows system.
Please always refer to the manufacturer's instructions for the correct application. All parts should be fitted by a qualified plumber.
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• Superb performance
• Robust construction
• Fits Ra-fs, Ra-fn, Ra-n and Ra-g valves