Competent Engineers

A ball plunger is a type of SLD that’s characterized by the use of a ball at the top. When pressure is applied, the ball sinks, thus compressing the enclosed spring. When pressure is removed, the compressive forces of the spring push the ball back up to its original position.

All ball plungers have a ball. The ball has a shallow depth, meaning it’s not capable of sinking very far. This shallow depth, however, allows ball plungers to easily change position under pressure. They will quickly sink under light loads, and they will quickly return to their original position when the load is removed.