ROD SEAL RBR

STANDARD SEAL DIMENSIONS

DESCRIPTION

The RBR ring, working as buffer ring, has been specially designed to work as main seal, to be used in combination with asymmetrical lip seals. Its function is to maintain working pressure for the second seal. It does not provide full sealing effect so an oil chamber will thus form between the two seals. Thanks to the special profile of the RBR ring, the growing pressure in the space will be released into the cylinder once a certain value is achieved. It works as a valve. It has been also designed to compensate pressure peaks.

TECHNICAL DATA

Pressure: < 400 bar at a temperature of 60° C
Speed: < 0.8 m/s
Temperature: from – 35° C to + 100° C with peaks till 110° C
Fluids: HL and HLP mineral oil

MATERIAL

The proposed material is polyurethane, with high elasticity modulus, fundamental for the sealing, low compression-set and high abrasion resistance. The hardness is 93 Shore A ± 2. For the anti-extrusion ring we propose a polyacetalic resin with high tensile strength.

ASSEMBLING

The assembling is done in closed groove. The polyurethane seal must therefore be fitted before the anti-extrusion ring.