Three wires and one control (normally closed as standard): N: Neutral wire (negative pole) L: Voltage wire (positive pole) Blue control wire: When the power is on, it is normally closed; when the power is off, it is normally open. One voltage wire, one neutral wire, and one valve opening wire; when the valve opening wire is connected to the voltage wire, it opens; if it is not connected to the voltage wire, it closes. (*The opening wire for a normally open valve is the opposite*) Valve Body Material: Brass Connection Type: Threaded Nominal Pressure: 1.6 MPa (MPa) Sealing Material: Nitrile Rubber + Polytetrafluoroethylene Applicable Temperature: -10T120 Main Material: Brass Material Working Medium: Water, oil, non-corrosive and non-flammable gases Note: All data is manually measured, please allow 1-3cm error due to differences in light and screen, there may be color differences, please refer to the actual received item.