Soft seal connectors are the most recent development in the evolution of hydraulic connectors.
They make use of an elastomeric seal – natural or synthetic – to prevent leakage.
The soft seal also helps connectors resist the effects of vibration, as well as the high-pressures used in many hydraulic systems today.
The seal in a soft seal connector usually takes the form of an O-ring.
Another advantage of soft seal connectors is their rapid assembly, which can be important in high-volume production environments.
The main limitation of soft seal connectors comes from the fact that performance of the o-ring can be affected by temperature and the system fluids, if they’re not compatible with the elastic substance.