Value Collection BDNA-9365 Nbr O-ring 25x31x3 Inch

Product Description

The VALUE COLLECTION BDNA-9365 is a round cross-section O-ring manufactured from Nitrile Butadiene Rubber (NBR), a synthetic elastomer widely used in fluid sealing applications across plumbing, hydraulic, pneumatic, and industrial systems. With a 25-inch inside diameter, 31-inch outside diameter, and 3-inch thickness, this is a large-format sealing ring suited for heavy-duty static and dynamic sealing tasks. NBR offers solid resistance to petroleum-based fluids, oils, fuels, and water, making it a practical choice where chemical compatibility with hydrocarbons is required. Plumbers, millwrights, and industrial maintenance technicians are the typical installers for O-rings of this size class.

This O-ring is appropriate for large-bore sealing applications in industrial piping, pump housings, flanged connections, and similar assemblies where a 25-inch bore must be sealed against fluid or gas migration. The round cross-section profile seats consistently in standard O-ring grooves machined to metric or inch tolerances that match the stated dimensions. Applications span water treatment, oil and gas, industrial fluid handling, and large-scale HVAC or chiller equipment where oversized seals are specified. Minimum order quantity is 25 units per order; each package contains 1 ring.

Key Features

• NBR material resists petroleum-based oils, fuels, and water across a broad service range
• 25-inch inside diameter and 31-inch outside diameter for large-bore sealing applications
• 3-inch cross-section thickness for deep-groove and heavy-duty seating
• Round cross-section seats uniformly in standard machined O-ring grooves
• Metric-specified dimensions (25 mm ID, 31 mm OD, 3 mm thickness) confirm metric-system design intent

Compatibility

Designed as a metric-dimensioned NBR O-ring replacement for large-bore static or dynamic sealing assemblies requiring a 25 mm inside diameter, 31 mm outside diameter, and 3 mm cross-section thickness. Verify groove dimensions against the specified ring dimensions before installation.

Installation Notes

Installation should be performed by a qualified technician familiar with fluid sealing systems. Depressurize and drain the system completely before removing any existing seals or disassembling flanged or threaded connections. Lubricate the O-ring lightly with a compatible fluid or assembly grease before seating to prevent pinching or tearing during installation. Never stretch the O-ring beyond what is necessary to seat it, and inspect the groove for burrs or damage that could compromise the seal.