Lost wax investment casting of manganese brass three-way valve body

Principle of manganese brass three-way valve body

Three-way valves are different from ordinary valves in that there is an outlet at the bottom. When the internal valve core is in different positions, the outlet is different. For example, when the valve core is in the lower part, the left and right are connected. For example, when the valve core is in the upper part, the right outlet is blocked and the left and lower ports are connected. Because the left port and the right port are not on a horizontal line. When the HP heater is disconnected in an emergency, the valve is closed and the water supply is bypassed.

Classification of manganese brass three-way valve body

Three-way valve is divided into confluence valve and diverter valve according to the way of fluid action. The confluence valve has two inlets and flows out from one outlet after confluence. The diverter valve has a fluid inlet and flows out from two fluid outlets after shunting.

Characteristics of manganese brass three-way valve body

1. Three-way valve has two valve cores and a seat structure similar to that of a two-seat valve, but in the three-way valve, when the flow area between one valve core and the seat increases, the flow area between the other valve core and the seat decreases. In the two-seat valve, the flow area between the two valve cores and the valve seat is increased or decreased at the same time.

2. The gas opening and closing of the three-way valve can only be realized by selecting the positive action and reaction of the power machine, while in the two-seat valve, the gas opening and closing can be realized directly by reversely installing the valve body or the valve core and the valve seat.

3. When the three-way valve is used in the control system that needs fluid proportioning, it can replace an air-opening control valve and an air-closing control valve at the same time, so the installation cost and installation space can be reduced.

4. Three-way valves can also be used in bypass control places, for example, one fluid needs to pass through a heat exchanger, and the other fluid does not need to pass through a heat exchanger. When the three-way valve is installed in front of the heat exchanger, a split three-way valve is used, and when the three-way valve is installed behind the heat exchanger, a combined three-way valve is used. Because the liquid flowing through the three-way valve installed in front of the heat exchanger has the same temperature, the leakage is small, and the liquid flowing through the three-way valve installed behind the heat exchanger has different temperatures, which has different expansion degrees on the valve core and valve seat, so the leakage is large. Usually, the temperature difference between two liquids should not exceed 150 degrees.

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