Armstrong 961131-034 Buna-N O-Ring 2-1/8" ID x .070" Cross Section

The Armstrong 961131-034 is a precision-engineered O-ring designed for reliable sealing in pumps, valves, and mechanical systems. This component features a 2-1/8 inch inside diameter with a .070 inch cross-section, manufactured from Buna-N (nitrile rubber) material for versatile performance across a wide range of applications.

Key Specifications:

• Inside Diameter: 2-1/8 inches (2.125")
• Cross Section: .070 inches
• Material: Buna-N (Nitrile Rubber, NBR)
• Temperature Range: -40°F to 250°F (-40°C to 121°C)
• Excellent resistance to petroleum-based oils and fuels
• Good resistance to water, hydraulic fluids, and aliphatic hydrocarbons

Applications:

• HVAC pump and valve sealing applications
• Circulator pumps and mechanical seals
• General industrial fluid handling systems
• Replacement seal for Armstrong pumping equipment

Buna-N (nitrile) is one of the most widely used elastomers for O-rings due to its excellent balance of mechanical properties, cost-effectiveness, and broad chemical compatibility. This material is ideal for applications involving petroleum oils, mineral-based hydraulic fluids, and general-purpose sealing requirements.