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Working principle of electric globe valve
May 15, 2018

The Electric globe valve works by rotating the valve to make the valve unblocked or occluded.

Gate Valve Switch Light, small size, can be made into a large caliber, sealed reliable, simple structure, easy maintenance, sealing surface and spherical often in the closed state, not easily by the medium erosion, in various industries have been widely used.

A, the opening process

1 in the closed position, the valve body is subject to the mechanical pressure of the stem, tight pressure on the seat.

2 when turning counterclockwise, the stem moves in reverse, and the bottom angle plane makes the sphere take off the seat.

The 3 stem continues to ascend and interacts with the guide pins in the stem spiral groove to rotate the sphere without friction.

4 up to the full open position, the stem is elevated to the limit position and the sphere rotates to the full open position.

B, shutdown process

When 1 is closed, rotate the handwheel clockwise, the stem begins to fall and the ball leaves the seat and rotates.

2 continue to rotate the handwheel, the stem is embedded in its upper spiral groove in the role of the guide, so that the valve stem and the brake plate at the same time rotating 90 °.

3 The gate has been rotated 90° without contact with the seat when it is close to closing. 4 The last laps of the handwheel, the angular plane at the bottom of the stem is mechanically wedged into the pressing sphere, so that it is tightly pressed on the seat to achieve complete sealing.


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