摘要 |
<p>The valve has a moveable valve element (V), circular spring holder (H) and a helical spring (F), where a side of the spring is provided in the element and another side is provided in the holder. The element has a mushroom-like body structure, and a shaft passes into a borehole of the holder. The holder has a set of openings with axes that are parallel to a pressure pipe line axis.</p> |