RAS-D2 Straight TRV complete with all Chrome sensor and 8,10 & 15mm compression fitting Unique flow selectable bi-directional valve The new RAS-D2 radiator thermostats are the latest addition to the Danfoss TRV range. They are designed for use in 2-pipe domestic heating systems like designer radiators or towel rails. All RAS-D2 Combi Packs comprise of a RA-FS bi-directional valve and a RAS-D2 sensor. Combi packs are also available with a RLV-D lockshield valve. The valves have a ½” BSP (R½”) tail piece connection to the radiator and include 8mm, 10mm and 15mm compression fittings to connect the valve to the pipe work. The valve bodies are reversible and bi-directional and include a flow-selectable feature to ensure trouble free installation without any risk of water hammer. The valve is supplied with a protective cap, which can be used for manual regulation during the construction phase. The cap must not be used as a manual shut off device. RAS-D2 sensors incorporate a “Frost Protection” setting and a “Positive Off” feature for maximum user flexibility. Temperature range is from 8°C to 28°C