"Interface: DN15 = 1/2 inch; DN20 = 3/4 inch; DN25 = 1 inch; DN32 = 1-1/4 inch Flow: DN15 (1/2 inch): 11m3/h; DN20 (3/4 inch): 20 m3/h; DN25 (1 inch): 60 m3/h; DN32 (1-1/4 inch): 80 m3/h; Installation: - On the valve there are 3 cables, - First, connect the yellow cable to N 220v - Second, you must find a switch to switch from blue wire to L 220v and from brown wire to L 220v. - When the blue wire is connected to L of 220v, the valve opens, after fully open, the actuator turns off; - When the brown wire is connected to L 220v, the valve closes, after fully closed, the actuator turns off. - Note: blue and brown cables cannot be connected to 220v L simultaneously. or the valve will be damaged Voltage: 220v AC; maximum pressure is 1.0 MPa. Rated pressure is 1.6 MPa." Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia