To Use The American Standard Ball Valve, You Must First Understand Its Principle

2 Piece Ball Valve is very common in today's life. It is a new type of valve. It is not only spherical but also has a normal shape. It can be used in every place where it is needed. Moreover, the characteristics of this valve are simple and easy to operate, and its size and weight are relatively small and light. Because this valve has good sealing performance, it is also widely used in some vacuum environments. So, what are the classifications of American standard ball valves? Here are several types for you.

1. Elastic ball valve

This sphere is elastic, but the sealing pressure is large. If it only relies on the pressure of the medium itself, it cannot meet the sealing requirements. It must be pressed by external force. Therefore, this elastic ball valve is more suitable for high-pressure environments.

2. Floating ball valve

As the name suggests, the floating ball valve can float and can be displaced according to the pressure of the medium itself, so that it can be tightly pressed at the outlet to ensure the sealing of the outlet. The structure of this ball valve is relatively simple, and the sealing performance is also relatively better. We can use it in medium and low pressure environments.

3. Fixed ball valve

Since there are elastic and floating ball valves, the most commonly used one among the American standard ball valves is the fixed ball valve. Obviously, this kind of ball valve will not move after being subjected to pressure. This kind of ball valve is widely used in high pressure and large diameter environments.

In short, there are many types of American standard ball valves. If there is a need, you can choose the appropriate one according to your actual situation, so as to use it better.

What are the working principles and installation requirements of the American standard ball valve?

As a valve device with a spherical 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 is the same type of valve as the flange gate valve, due to the difference in structure, they still have considerable differences in working principles and installation requirements.

Working principle of American standard ball valve

During the opening process, the ball valve is in the 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 the fully open position is reached, the valve stem reaches the limit, and the ball reaches the fully open position at the same time. At this time, the work of connecting, cutting, 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 action occurs to make the valve stem and the ball rotate half a circle 90 degrees. Continue to apply pressure to achieve a contactless rotation of the ball and the valve seat by 90 degrees. The final handwheel 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, make sure that the protective covers at both ends of the flange are removed before installation, the residual impurities in the pipeline are cleaned, and the pipeline near the installation point does not sag or bear external forces. At the same time, the flange connection bolts must be tightened after installation.

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