MXE21.25U/180 Electromotoric 3-port zone valve AC 230 V on/off 2-position control signal, auxiliary switch
PN16, DN25, kvs = 6.3 m3/h, dpmax = 30 kPa. 
Key data to replacement product: 3-port valve PN16, DN25, kvs = 5 m3/h, dpmax = 100 kPa (
Key data to replacement product: valve has different direction of flow). 
Info: Electromotoric actuator SFA21/18 and auxiliary switch ASC2.1/18 also needed.