Definition and Types of Metal O-Rings

O-rings are the metallic variations of generally utilized elastomeric O-rings. They are commonly utilized in static fixing applications that are contradictory with the physical and compound attributes of elastomeric O-rings. These O-rings have high resilience to radiation as well as high vacuum, and are by and large utilized for flanged applications. In a perfect world, metal O-rings are put in both open and shut grooves and pivotal strain is applied between two equal surfaces. Moreover, grooves that hold the O-rings are intended to be opposite to the course of the liquid stream. When set among surfaces and packed to a foreordained level, twists and makes contact between the jointing and fixing faces. Innately, O-rings’ metallic versatility shows a sensible diversion and makes greatest fixing contacts during activity to guarantee the fixing activity. Notwithstanding versatile diversion of the metal, underlying forms of the O-rings likewise assume a significant part in making the fixing force. Albeit most metals can be utilized for assembling metal O-rings, the selection of metals ought to be with the end goal that the direct development co-productive of the O-ring metal fluctuates somewhat from the straight extension co-proficient of the metal(s) of jointing surfaces. Metal O-rings are powerless against rusting not at all like elastomeric O-rings, and all things considered, are covered with a reasonable material to abstain from rusting. This material is gentler than the base metal and fills an extra need of nullifying the impact of surface irregularities. The covering materials that are commonly utilized are delicate metals, like silver, and non-metals like PTFE.

Empty Metal O-Rings

Empty metal O-rings are basically more modern in examination with strong metal O-rings and framed by roundabout cylinders twisted to the eheringe selbst schmieden state of a ring. Empty metal O-rings by and large capacity like their elastomeric partners, for example when squeezed between jointing surfaces, they show spring-back impact causing a bigger fixing surface between the seal and the jointing surfaces. These O-rings are sub-characterized in light of the qualities of the empty portion of the ringThese are empty metal O-rings with nitrogen at climatic strain or vacuum inside them. Plain empty O-rings are utilized in low tension or low vacuum applications. Albeit plain empty O-rings show comparability in temperature and tension taking care of capacities with strong metal O-rings, they offer considerably better spring-back and fixing abilities. By and large, plain empty metal O-rings are produced in Inconel 750 and plated with silver.

Self Energized Hollow O-Rings:

Self-empowered empty O-rings have openings or vents on their surfaces to use the framework pressure or environmental tension for fixing activity. Contingent upon the direction of such scores, the O-rings are additionally characterized into inside vented O-rings and remotely vented O-rings. Inside vented O-rings made of gentle steel and plated with PTFE can endure tensions of up to 3500 kg/sq cm and temperatures of 600°C. Remotely vented O-rings are utilized in applications where the external tension is higher than the strain inside the seal.

Pressure Filled Hollow Rings

Pressure filled empty O-rings are adjusted plain empty rings with compressed idle gasses inside them. These O-rings can be utilized in tongue and furrow ribs and can deal with temperatures from cryogenic temperatures up to 850°C. Pressure filled O-rings are utilized in vacuum fixing applications.


Metal O-rings can’t be utilized in profoundly powerful fixing applications
These O-rings are delivered pointless after they are utilized once in light of the fact that they can’t hold their shape after single useWide resiliences of the depression can’t be obliged by the metal O-rings, particularly in bigger sizes
Cautious fitting ought to be done to stay away from their disfigurement before their seal is fixed.