Comparable to spring-energized U-cup seals, but without dead space. If the groove of the U-cup seal is to be avoided in applications involving paint or food products, an O-ring can be used as the energizing element instead of a spring. Particular attention must be paid to preload, elastomer quality, and Shore hardness. Due to the
This is a proven design principle in which the chemically resistant, low-friction jacket made of polytetrafluoroethylene or ultra-high-molecular-weight polyethylene is energized by a stainless steel spring. This gives the U-cup seal elasticity, provides a low initial contact force, and allows the sealing force to increase with system pressure. Low-friction designs are possible, as are applications