O-ring Packing in NBR, 5.5 mm Thickness | Sealing Tech-G

The NBR (Nitrile Butadiene Rubber) O-ring with 5.5 mm thickness from Sealing Tech-G is a precision O-ring for direct replacement applications in equipment that uses this intermediate size, common in European industrial machinery (especially Italian and French) and in industrial process equipment where a larger cross-section than 5 mm is required to increase compression and extrusion resistance. Available in 2 internal diameters: 47 mm and 70 mm, it covers applications in medium-diameter valves and pumps. The 5.5 mm thickness is a niche size that appears in equipment where the designer opted for a non-standard cross-section to optimize sealing under specific pressure or temperature conditions. Highly compatible with oils, fuels, lubricants, water, and numerous non-polar solvents, it guarantees reliable sealing in demanding industrial environments.

Applications

• Direct replacement of original seals in equipment with 5.5 mm thick seal dimensions (European origin)
• Industrial ball, butterfly, and gate valves: seat and stem seals in medium diameters (47 and 70 mm)
• Hydraulic and pneumatic pumps: cover, body, and shaft seals in process equipment
• High-pressure hydraulic cylinders: static seals with greater compression than 5 mm seals
• Italian and French industrial machinery: process equipment, presses, and fluid systems with this specific size
• Chemical and food processing equipment: flange and cover seals in reactors and mixers
• Industrial compressors: valve and body seals in European-origin equipment
• Maintenance and repair of imported European equipment with 5.5 mm thick seals

Technical Specifications

• Material: NBR (Nitrile Butadiene Rubber, Nitrile Rubber)
• Seal thickness (CS): 5.5 mm
• Available internal diameters: 47 mm / 70 mm
• Outside diameters (approx. OD): 58 mm / 81 mm
• Temperature range: -30 °C to +100 °C (peaks up to +120 °C)
• Chemical resistance: Mineral oils, fuels, lubricants, water, non-polar solvents
• Configuration: O-ring
• Sales unit: Unit
• Country of origin: Taiwan
• Brand: Sealing Tech-G

Chemical Compatibility

NBR is compatible with mineral oils, fuels, lubricants, water, and non-polar solvents. It is not compatible with concentrated acids, ketones, esters, ozone, or glycol-based brake fluids. For these applications, consider EPDM or VITON O-rings.

Other Common Names

This component is also known as: NBR o-ring 5.5 mm thickness, nitrile o-ring 5.5mm CS, NBR round gasket 5.5mm, European NBR o-ring 5.5mm, NBR O-ring 5.5mm cross section, NBR o-ring 5.5mm Italian French, nitrile rubber O-ring 5.5mm, oring gasket replacement European equipment Honduras 5.5mm, oring 5.5mm diameter 47 70 mm.