A cup style seal is specifically used on which type of equipment?

A cup style seal is primarily designed for use in reciprocating pumps, where it effectively manages the sealing and prevents fluid leakage. Reciprocating pumps operate by moving fluid through a chamber via a back-and-forth motion, and during this process, the sealing element must accommodate the dynamic movement of the piston.

The cup seal has a unique design that allows it to maintain a tight seal against the reciprocating action of the piston while providing flexibility and durability. This design helps to minimize wear and elongate the lifespan of both the seal and the pump. Because of its capacity to handle the high pressures common in reciprocating pumps and accommodate their mechanical motion, the cup style seal is a preferred choice in these applications.

In contrast, rotary pumps, centrifugal pumps, and gear pumps utilize different sealing mechanisms that are more suited to their operation and fluid dynamics, which is why they are not typically paired with cup style seals.