What Are The Working Principles And Installation Requirements Of American Standard Ball Valves?

As a valve device with a ball as the closing part, the main function of the American standard ball valve in the pipeline is to cut off, distribute and change the flow direction of the medium. Although it belongs to the same type of valve as the flange gate valve, due to the difference in structure, they still have significant differences in working principles and installation requirements.

Working principle of 3 Piece Ball Valve

During the opening process, the ball valve is in a closed state at the beginning. Due to the pressure of the valve stem, the ball is tightly pressed on the valve seat. When the hand wheel of the valve body is turned counterclockwise, the valve stem is stressed and the ball begins to slowly leave the valve seat. When the valve stem continues to be pushed, the valve stem and the spiral groove of the valve stem produce a guide pin interaction, and the ball rotates without friction. When it reaches the fully open position, the valve stem reaches the limit, and the ball reaches the fully open position at the same time. At this time, the work of cutting off, distributing and changing the flow direction of the medium begins.

During the closing process, the entire operation process presents the opposite phenomenon, that is, the hand wheel is turned counterclockwise to make the ball leave the valve seat and then rotate. After reaching a certain position, the guide pin acts to rotate the valve stem and the ball by 90 degrees. Continue to apply pressure to achieve a non-contact rotation of the ball and the valve seat by 90 degrees. The final hand wheel rotation makes the ball press tightly on the valve seat.

Installation points of American standard ball valve

Installing American standard ball valve is a strict procedure, which requires professional personnel to install. To ensure the quality of installation, before installation, it is necessary to ensure that the protective covers at both ends of the flange are removed, the residual impurities in the pipeline are cleaned, and the pipeline near the installation point is not drooping or subjected to external forces. At the same time, the flange connection bolts must be tightened after installation.

The working principle and installation points of the American standard ball valve are introduced to you. If there is a need, you must find a professional manufacturer to purchase it, so as to ensure the quality.

Design standards for American standard flange ball valves:

Design and manufacturing standards follow: ASME B16.34, API6D, etc.

Structural length follows: ASME B16.10;

Flange end dimensions follow: ASME B16.5;