What is a 3-Way Valve?
mixing, diverting or selecting.
Mixing valves combine two fluid streams into a single one:
Diverting valves, as the name implies, divert an incoming fluid to one of two output ports:
Selecting valves are basically diverting valves in reverse; the incoming fluid is selected from one of two ports and exits the output port:
Three-way ball valves are available in two basic configurations: T-Port and L-Port.
T-Port 3-way valves have three holes drilled to resemble the shape of the letter "T". T-Port Valves can be used in all three modes, depending on the valve setting. Referring to the figure below, T-Port valves can be set in four different positions.
- T1 Flow Path (Left Mixing): Media entering from left flows straight through valve, mixing all ports in Position 2, until diverted left and out front port in Position 2.
- T2 Flow Path (Left Diverter): Media entering from left flows straight through valve in Position 1, until diverted left and out front port in Position 2.
- T3 Flow Path (Right Diverter): Media entering from right flows straight through valve in Position 2, until diverted right and out front port in Position 1.
- T4 Flow Path (Right Mixing): Media entering from right flows straight through valve, mixing all ports in Position 1, until diverted right and out front port in Position 2.
Note that there is always a fluid path through the valve regardless of setting. T-Port valves can therefore never be closed.
L-Port 3-way valves have two holes drilled on different sides (90°) and resembles the shape of the letter "L". L-port valves can be used as diverter or selector valves, but not as a mixing valve. L-Port valves have a single setting to divert flow to the left or right with one 90º turn of the handle:
3-Way Valve Actuation
Valworx valves come with an integral mount for easy attachment to a valve actuator. (For a primer on motorized valves click here). The standard valve setting depends on the type of actuator.
For more information regarding three-way ball valves, click here for ProTips: 3-Way Ball Valves.