Used as a mixing, diverting or change-over valve in conjunction with either the VA125… thermal drive for unit valves, the continuous VA120.1(M) drive or the VA150.2 motorised drive for unit valves for controlling heating zones, air secondary-treatment appliances, fan convectors and two-wire systems with heat exchanger. Valve and drive are assembled either by simply screwing together or by using the bayonet fitting. Nickel-plated valve body of cast brass, with male thread, without cap nut. Spindle of stainless steel with soft-sealing valve cone for control and mixing passages. Characteristic practically equalpercentage. The flow through the mixing passage has been reduced by 30%. Stuffing box with double O-ring seal. The control passage A-AB is closed when the spindle is pressed in.