A 3-way solenoid valve has three pipe connections and two ports for liquids or gases. It includes a solenoid with a coil, core, and casing, and an actuator or cylinder controls the valve. There are different configurations, including NC, NO, and universal. The valve has a movable armature and a rotating diaphragm seal to prevent unintentional flow. It is used in various industries and can be connected to pressure controls, gauges, and electrical equipment.
A 3-way solenoid is a valve with three pipe connections. It also has two ports for the passage of liquids or gases. The electromagnetic part of the valve is the solenoid and comprises a coil, core and casing. Also included are two openings that alternate between open and closed, so that pressure can be applied accordingly; an actuator or cylinder controls the valve. Various manufacturers sell 3 port solenoid valves in different configurations, including normally closed (NC), normally open (NO), and universal.
Inside the valve housing, a movable armature is covered with fluid sealing parts at both ends. The various parts of the solenoid include a ring near a gasket to contain the fluid, as the spring on that end is in the correct position. While the 3-way solenoid is de-energized, fluid passes through the o-ring from one port to a second. A hole is aligned with a hole in the ring to allow for fluid or gas to pass through. The armature mechanism changes position when the valve is energized, preventing fluid from passing through this point and opening a third port for fluid.
Solenoids with three ports also include a rotating diaphragm seal to ensure that fluid or gas does not unintentionally flow to the wrong port. One port is always open, allowing flow direction control. This design is suitable for use with tools and fixtures such as hydraulic cylinders. Using a 3-way solenoid requires knowledge of the port size required for the application. The model chosen also depends on the fluid affected by the valve, the voltage applied to the valve and factors such as operating pressure and location.
Solenoid types can include NC 3-way solenoid valves. Their de-energization causes the pressure port to close and the discharge port to open, while the discharge port closes and the pressure port opens when the valve is energized. In NO valves, the discharge port closes when the system is de-energized, while the pressure port is closed in an energized valve. Solenoids that can operate both ways are known as universals.
A 3-way solenoid can handle various types of gas or fluid. It is used in industries that use process equipment and those that build and maintain transportation infrastructure and vehicles. Medical and energy facilities also use solenoids. Depending on the application, the valve can be connected to pressure controls, pressure gauges and electrical equipment.
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