Brkert 6213ev standard solenoid diaphragm valves servo assisted 22 way burkert 221621 this standard solenoid valve has an orifice dimension of 13mm and a kv of 36msup3h the 22 way valve features a servo assisted spring coupled diaphragm that supports valve opening and closing suitable for use with neutral fluids water hydraulic oil and oil without additives brkert 221 621 solenoid valve 230v 50hz g34 13mm 36mh polyamide coil