The ESBE series F is a valve made of cast iron for use inheating and cooling installations. The mixing proportions are adjusted manually with a handle or, in automatically controlled systems, by means of an actuator. Suitable actuators are ESBE series 90. The valve can alco be equipped with ESBE controllers series 90C, CRA120 or CRA110 and CRB =DN40. Valve series 4F is available in dimensions DN 20-150 with flanged connections. The scale is graded on both sides and can be turned, allowing a choice of mounting positions. Operation angle =90 degrees.