Three piece butt welding ball valve

型号：

Q61F-16P/R

规格：

DN8-DN100

公称压力：

1.6-6.4Mpa

Three-piece butt welding ball valve is suitable for various types of...~>.
, the working temperature is ~℃ (the sealing ring is reinforced polytetrafluoroethylene) or ~℃ (the sealing ring is para-polystyrene) On the pipeline, it is used to cut off or connect the medium in the pipeline. Different materials are selected and can be applied to various media such as water, steam, oil, nitric acid, acetic acid, etc.
Working principle:
1. Opening process
In the closed position, the ball is pressed against the valve seat by the mechanical pressure of the valve stem.
When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, and the angular plane at the bottom causes the ball to disengage from the valve seat.
, the valve stem continues to lift, and interacts with the guide pin in the spiral groove of the valve stem, causing the ball to start rotating without friction.
, until it reaches the fully open position, the valve stem is lifted to the extreme position, and the ball rotates to the fully open position.
2. Closing process
When closing, rotate the handwheel clockwise, the valve stem begins to fall and the ball leaves the valve seat and begins to rotate.
Continuing to rotate the handwheel, the valve stem is acted upon by the guide pin embedded in the spiral groove on it, causing the valve stem and the ball to rotate simultaneously.
When it is about to close, the ball has rotated without contact with the valve seat.
During the last few turns of the handwheel, the angular plane at the bottom of the valve stem mechanically wedges against the ball, pressing it tightly against the valve seat to achieve a complete seal.