The float always floats on the water, and as the water rises, the float also rises. As the drift rises, the connecting rod also rises. The connecting rod is connected to the valve at the other end. When it rises to a certain position, the connecting rod supports the rubber piston pad to close the water source. When the water level drops, the float also drops, and the connecting rod drives the piston pad to open.

The float valve adjusts the liquid supply by controlling the liquid level. Full-liquid evaporators require a constant level of liquid level and are generally suitable for use with float expansion valves. The working principle of the float valve relies on the lowering and raising of the floating surface of the float ball in the float chamber to control the opening or closing of a valve. The float chamber is placed on the side of the full liquid evaporator, and the upper and lower balance tubes are connected to the evaporator, so the liquid levels of the two are the same. When the liquid level in the evaporator drops, the liquid level of the float chamber also drops, so the float ball descends, and the opening degree of the valve is increased by the lever action, and the liquid supply amount is increased. vice versa.