SP Series – High Pressure, Poppet Style Screw Connect Couplings

SP Couplings are designed to withstand high pressures and pressure pulses. High pressure pulses create forces that act to separate the male and female couplings.

With couplings that use ball-in-groove retaining mechanisms, the separating forces are concentrated onto a relatively small area – point contact of the balls – which can cause Brinelling (indentation of the balls into the groove), leading to leakage and eventually seizure of the coupling.

Screwed couplings have a screw thread retaining mechanism that distributes the separating forces over a large surface area, thus eliminating brinelling.