The trapezoidal shape is said to eliminate the possibility of the O-ring popping out, unlike standard round-shape O-rings that rely on being pinched by the groove retaining ring for seal retention.

O-ring sealing systems are ubiquitous in oil/gas field applications and have been extensively tested. The general relationships between O-ring designs and their performances are well known; however, O ...

O-rings and guide rings are both used on hydraulic cylinders, but they handle different tasks. O-rings are often the first choice for engineers because of their flexibility and performance in static ...