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Shanghai Shenhong Valve Co., Ltd. > Technical Articles > Working principle of L-type three-way coking ball valve

technical article

Working principle of L-type three-way coking ball valve

Read: 5102 Release time: 4/13/2019
The T shape can make three orthogonal pipelines communicate with each other and cut off the third channel, which plays the role of diverting and converging. The L-shape can only connect two pipes that are orthogonal to each other, and cannot keep the third pipe connected to each other at the same time, only for distribution. Three-way ball valve can be divided into L-shaped and T-shaped, L-shaped (Q44F) three-way ball valve is used to switch the direction of medium flow, which can connect two channels that are perpendicular to each other; T-shaped (Q45F) three-way ball valve Confluence and flow direction switching. The T-shaped three-way ball valve can communicate three channels or two of them. The three-way ball valve generally adopts a two-seat structure, and a four-seat structure can also be adopted according to user requirements. Q45F PN16 ~ PN40 T-shaped three-way ball valve has T-shape and L-shape. The T shape can make three orthogonal pipelines communicate with each other and cut off the third channel, which plays the role of diverting and converging. The L-shape can only connect two pipes that are orthogonal to each other, and cannot keep the third pipe connected to each other at the same time, only for distribution. T-type three-way ball valve can make three orthogonal pipelines communicate with each other and cut off the third channel.
L-type three-way high temperature ball valve Q44PPL working principle
It is a valve that can switch the flow direction of the medium and split or mix the medium. The three-way ball valve is divided into L-type and T-type. The L-type three-way ball valve is suitable for switching the medium flow direction and can make two channels perpendicular to each other. Connected; T-type three-way ball valve is suitable for medium flow splitting, confluence or flow direction switching. T-shaped channel can make three channels communicate with each other or two of them. Three-way ball valve generally adopts two seat structure. Users require a four-valve seat structure.
A, Q44PPL 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 the bottom makes the ball release the valve seat.
3 The valve stem continues to lift, and interacts with the guide pin in the spiral groove of the valve stem, so that the ball starts to rotate without friction.
4 Until the fully open position, the valve stem is lifted to the extreme position, and the ball is rotated to the fully open position.
B. The closing process
1 When closed, turn the handwheel clockwise, the valve stem starts to lower and the ball leaves the valve seat and starts to rotate.
2 Continue to rotate the handwheel, the valve stem is affected by the guide pin embedded in the spiral groove on it, so that the valve stem and the ball are rotated 90 ° at the same time.
3 Just before closing, the ball has rotated 90 ° without contacting the valve seat.
4 After a few turns of the hand wheel, the angular plane at the bottom of the valve stem is mechanically wedged to press the ball tightly against the valve seat to achieve a complete seal.
[Q44PPL Product Features]
1. Multi-use of one valve: any port can be used as an inlet without leakage. The three-way can be made into L-shaped port or T-shaped port.
Compact structure, rapid opening and closing, unobstructed flow channels, and low fluid resistance
2, good sealing performance: the use of four-sided valve seat material polytetrafluoroethylene elastic deformation to achieve a leak-free seal

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