three-way valve

#Here, quick three-way valves are classified into merging valves and splitting valves based on their mode of fluid operation. A merging valve has two inlets, and the fluid flows out through one outlet after merging. The diverter valve has one inlet, from which the flow is divided and exits through two outlets. The body of a three-way valve has three ports: one inlet and two outlets, or two inlets and one outlet ； Unlike ordinary valves, when the internal valve core is in different positions, different outlets become connected; for example, when the valve core is in the lower position, the left and right sides are connected while the lower outlet remains closed ； When the valve core is in the upper position, the lower left side is connected, while the right outlet is closed. Reply#

Hello, there should be a merging valve on site; could you please check if it can be used as a splitting valve?

All three sizes at our site are the same; we mainly want to know if they can be used as shunt valves in reverse

This post was last edited by ylb913 on 2017-2-7 at 12:03. Three-way diverter valves and three-way combiner valves differ in structure; in a diverter valve, the material is fed between the upper and lower valve elements, and the forces acting on these elements essentially cancel each other out (they oppose one another)； Conversely, when used for merging, the medium flowing in from the left and below exerts forces on both valve spools in the same upward direction, which has a significant impact on the valve’s regulating performance. Conversely, the three-way merging valve has inputs on two sides and an output in the middle; the forces of the two fluids act in opposite directions and cancel each other out ； Used for shunting; the force acting on the two valve cores, with the medium entering from the left and exiting downward, is directed downward in both cases, so the two forces are in the same direction. Assuming it is to be used in reverse, the flow direction of the inlet and outlet on the left and right should be opposite to what is indicated on the valve body.

In other words, it can be used in the reverse direction as well, but it affects the service life of the valve, right?

Can a three-way valve used for merging be used for splitting flow?

It’s mainly not a problem with the valve’s lifespan (that is primarily related to the stress on the valve stem); it’s rather a question of whether the force exerted by the actuator is sufficient. However, as I said, the installation should be carried out in the opposite direction to the arrow on the valve body, and that will resolve all the problems I mentioned earlier. ——If you look at the two pictures and do the calculations carefully, you’ll understand.

Imports and exports are different; they cannot be used simultaneously, and their principles are also distinct