When a line&#;s pressure is on the rise, the sealing elements of the ball valve are more tightly pressed together. In parallel, the ball and seat are subject to stronger forces. This scenario would not represent an issue for a device like a check valve. However, in ball valves, it could bring serious trouble. Why? Because they are central process fixtures that must remain operable, even amid a high differential pressure condition.
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For valves, a high-pressure setting is synonymous with high operating torque and a larger manual effort. So, when designers work within a high-pressure range, they may end up with calculations for lengthy handles and expensive gear requirements. Appropriately enough, the handle&#;s design can be bound by standards such as ISO and API 6D. Both provide rules on how to prevent collisions with other piping elements.
One way to decrease the operating torque is by reducing the friction coefficient of the material pair, i.e., using modified plastics (PTFE-filled PEEK). Though the results are not always as majorly significant as needed.
Another option is to assess other valve components and take action from the findings. As an idea, look at the stem. Big stem diameters increase the size of the valve&#;s body, raising operating torque (and costs).
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The target is to analyze all measures that add protection to the sealing elements. And the effective way to do it is by lowering the operating torque and impact forces. Both are critical to extending the valve&#;s lifespan, especially in high-pressure conditions.
That&#;s why knowing the types of ball valves is decisive in getting the design right.
XHVAL GROUP VALVE CO., LTD. is located in Wenzhou City, China. established in , engaged in professional valve development, manufacture and sale of professional valve manufacturers, with two subsidiaries; and sub-brand (XHVAL).
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