The OBVD ax/2ax reliably prevents the O-rings from
entering into the gap (gap extrusion) by means of their
highly extrusion-resistant back rings.
The OBVD 2ax version is suitable for pressurization
on both sides, e. g. as a static seal between piston
and rod.
The NBR O-ring, which is firmly fixed to the PUR back
ring, compensates for design clearances and tube
breathing.
The OBVD ax is suitable for any standard groove sizes,
e.g. in accordance to DIN 3771.