Value Collection BDNA-9336 O-ring 16in Id 21in Od Nbr

Product Description

The Value Collection BDNA-9336 is a large-diameter nitrile butadiene rubber (NBR) o-ring with a round cross section. It measures 16 inches inner diameter by 21 inches outer diameter with a 2.5-inch cross-section thickness. NBR, also known as Buna-N, provides reliable resistance to petroleum-based fluids, hydraulic oils, and water, making it a standard sealing material across industrial and fluid-handling applications. Licensed plumbers, pipefitters, and industrial maintenance technicians typically install o-rings of this size during equipment assembly or preventive maintenance on large-bore valves, pumps, and fluid system components.

This o-ring is suited for static sealing applications on large-diameter flanges, pipe couplings, valve bonnets, pump housings, and similar industrial or commercial fluid-handling assemblies. Its Buna-N compound performs across a broad temperature range and holds up in contact with common shop fluids, lubricants, and water-based solutions. The round cross-section geometry seats evenly in standard o-ring grooves and does not require special tooling for installation.

Key Features

• 16 inch inner diameter and 21 inch outer diameter for large-bore sealing applications
• 2.5 inch cross-section thickness provides substantial sealing surface contact
• Nitrile Butadiene Rubber (Buna-N) material resists petroleum-based fluids, hydraulic oils, and water
• Round cross-section geometry seats evenly in standard machined or molded o-ring grooves
• UNSPSC code 31401503 for procurement and catalog system alignment

Compatibility

Designed as a standard-dimension replacement or service o-ring for large-bore industrial valves, pump housings, flanged couplings, and fluid-system components that accept a 16 inch ID by 21 inch OD round-cross-section NBR o-ring.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or industrial maintenance technicians. Always depressurize and drain the system before removing the old o-ring or installing a new one. Clean the mating groove thoroughly and inspect for nicks, burrs, or corrosion that could compromise the seal. Apply a compatible, fluid-rated lubricant to the o-ring before seating to prevent tearing during assembly.