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 - Design (1) end piece/female thread - Automatic flow control No - Operation thermostatic with knob - Size radiator connection 3/8 inch (10) - Height 31mm - Kvs-value 0.9 - Opposed flow direction No - Thermostatic preparation Yes - Shortened overall length No - Pre-adjustable Yes - Housing material Brass.