1. By function: ball valve, gate valve, balance valve, stop valve, safety valve, pressure reducing valve, check valve

2. By material: iron, zinc and gold, magnesium alloy, copper, copper nickel plating, copper zinc plating, copper cadmium plating, copper electroplating

3. By brand: imported brands (Jacket Minnie, Ingsakson, Danfoss, Jaffey, Metz, Boma, etc.), domestic brands (Manrider, Sanye, Wanyang, Aminico, Jinteng, Yuanlun, etc.)

4. Classification according to control mode: automatic temperature control valve and manual temperature control valve 5 Classification of control modes: thimble control and mechanical knob control