2013年5月10日星期五

Three-way valve


Three-way valve according to the mode of action of the fluid is divided into two types of the confluence valve and diverter valve. The mixing valve two people from a confluence outlet. The shunt valve has a fluid population, split into two streams flowing from the two exits. Figure 2-5 is a shunt configuration diagram of the three-way valve. The confluence of the three-way valve similar to the structure of the three-way valve structure shunt. Its features are as follows.
1 three-way valve spool and seat structure similar to the double seat valve. However, the three-way valve, a flow area between the spool and the valve seat, another spool and the flow area between the valve seat reduced. Seat valve, the flow area between the two spool and seat at the same time increase or decrease.
2 three-way valve open air gas off only through the choice of executing agency of action and reaction. Seat valve open air gas off change directly to the valve body or the spool and the valve seat anti installed meters to buy now.
3 three-way valve for applications that require fluid ratio control system, due to it instead of an open air control valve and a gas off control valve, pilot valves
therefore, can reduce cost and installation space. 4 three-way valve for bypass control spaces, for example, all the way to the fluid through the heat exchanger, the other way fluid heat exchanger. When the three-way valve is installed before the heat exchanger, the shunt three-way valve; when the three-way valve is installed after the heat exchanger, the confluence of the three-way valve. As installed in the fluid flowing through the heat exchanger before the three-way valve has the same temperature, therefore, a smaller amount of leakage; fluid flowing within the three-way valve installed in the heat exchanger after the type of temperature on the spool the type and degree of expansion of the valve seat, the amount of leakage. Typically, the temperature difference of two fluid should not exceed 150 ° C.solenoid valve actuator

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