Stepless presetting - Brass - Nickel-plated - Presetting is done by means of presetting key 1183962 or key SW 13 - For two-pipe central heating systems with forced circulation - Not suitable for heating systems with steam - The valve inserts additional technical features: - Dimension thermostatic connection M30 x 1.5 - Version (1) end piece/female thread - Automatic flow control No - Operation thermostatic with knob - Size radiator connection 1/2 inch (15) - Kvs-value 1 - KV-value 0.36 - Flow direction opposite No - Thermostatic preparation Yes - Shortened construction length No - Pre-adjustable Yes - Material of the housing Brass.