O-ring Packing in NBR, 7 mm Thickness | Sealing Tech-G

The NBR (Nitrile Butadiene Rubber) O-ring with 7 mm thickness from Sealing Tech-G is a large cross-section metric O-ring, compliant with DIN 3771 standard, designed for large diameter and high-pressure industrial applications. With 6 available internal diameters: 60, 110, 114, 165, 170, and 175 mm, this replacement catalog covers specific industrial process equipment: from medium-diameter cylinders and valves (ID 60 mm) to large industrial flanges and pressure vessels (ID 165–175 mm). The 114 mm ID is a typical size for DN100 flanges in European process equipment. The 7 mm cross-section provides maximum compression, excellent extrusion resistance, and long service life under severe pressure and temperature conditions. Highly compatible with oils, fuels, lubricants, water, and numerous non-polar solvents.

Applications

• ID 60 mm: High-pressure hydraulic cylinders, large-body industrial valves, actuators, and process pumps
• ID 110 mm: DN100 pipe flanges, heat exchangers, lid and body seals in industrial process equipment
• ID 114 mm: DN100 flanges in European process equipment, inspection and lid seals in industrial reactors and mixers
• ID 165–175 mm: Large industrial flanges DN150/DN160, pressure vessels, chemical reactors, large diameter inspection covers
• Direct replacement in machinery compliant with DIN 3771 standard with 7 mm seal thickness
• High-pressure hydraulic systems with European metric standard: large diameter cylinders, distributors, and actuators
• Chemical, petrochemical, and power generation process machinery: high-pressure flange and lid seals
• Maintenance and repair of imported industrial equipment with 7 mm thick seals and large diameters

Technical Specifications

• Material: NBR (Nitrile Butadiene Rubber, Nitrile Rubber)
• Seal thickness (CS): 7 mm
• Reference standard: DIN 3771
• Available internal diameters: 60 / 110 / 114 / 165 / 170 / 175 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 7 mm thickness, nitrile o-ring 7mm CS, NBR round gasket 7mm, DIN 3771 NBR o-ring 7mm, metric NBR o-ring 7mm large diameter, nitrile rubber O-ring 7mm, industrial o-ring gasket Honduras 7mm, 7mm high-pressure large diameter nitrile o-ring, DN100 DN150 NBR o-ring 7mm flange seal.