L Port vs. T Port Ball Valves

The 3-way ball valve has three-way ball valve appearance with two sealed seats.It has beautiful appearance, compact and reasonable structure as well as good sealing performance,like ZJCLV three way ball valve.What’s more,it can realize the switch of medium flow direction in the pipeline, which can also connect or close the mutual vertical and two channels.

L Port vs. T Port Ball Valves
3 Inch 3 Way Ball Valve

According to the different design of the ball flow channel, the 3-way ball valve is divided into L port and T port.

1) L Port Ball Valve

L port 3-way ball valve can connect two mutually orthogonal pipeline. But it can not keep the third pipeline interconnection, and only play a distribution role. The flow path of three-way 4-sided valve seat ball valve uses a 2-sided valve seat, which mainly used for flow path reversal.

2) T Port Ball Valve

T Port ball valve is a tool that enables two other channels to be connected and flexibly controls the merging or diverging of media in the pipeline.It can make three orthogonal pipeline interconnection and cut off the third channel, and play a diversion, merging role. The flow path of 3-way 4-sided seat ball valve uses a 4-sided seat and balanced forces to ensure reliable sealing on the closed channel. And it is mainly used for diversion, mixing, directional and complete opening of three channels.

L Port vs. T Port Ball Valves

3)Working Principle of 3-Way Ball Valves

L Port vs. T Port Ball Valves

A. The opening process

1. In the closed position, the ball is pressed tightly on the valve seat by the mechanical pressure of the valve stem.

2.When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, and the angular plane at its bottom makes the ball release the valve seat.

3.The stem continues to lift and interact with the guide pin in the spiral groove of the stem so that the ball starts to rotate without friction.

4.Until it reaches the fully open position, the valve stem is lifted to the limit position and the ball rotates to the fully open position.

B. The closing process

1.When closing, turn the handwheel clockwise, the valve stem starts to descend and make the ball leave the seat and start to rotate.

2.When continue to rotate the handwheel, the valve stem by the role of the guide pin is embedded in its spiral groove, so that the stem and the ball at the same time rotate 90 °, at this time the ball and the valve seat don’t contact.

3.Finally, the angular plane at the bottom of the stem mechanically wedges against the ball to press it tightly against the seat to achieve complete sealing.

4) The Characteristics

1.Compact structure, rapid opening and closing, smooth flow channel, low fluid resistance.

2.Good sealing performance: the use of four-sided valve seat material PTFE elastic deformation to achieve a leak-free seal.

3.A valve multi-purpose: any pass port can be used as an entrance without leakage, three passes can be made into both L-type pass port, but also T-type pass port.

4.With easy maintenance, after the system is depressurized, the whole valve body can be inspected and maintained without removing it.


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