Value Collection ZMSCH70244 O-ring Dash 244 Nbr 70

Product Description

The VALUE COLLECTION ZMSCH70244 is a Dash 244 O-ring manufactured from Nitrile Butadiene Rubber (NBR), also known as Buna-N, the most widely used elastomer for sealing applications in fluid and pneumatic systems. With an inside diameter of 4.25 inches, an outside diameter of 4.5 inches, and a thickness of 0.125 inches, this round cross-section O-ring is designed to seat precisely in standard Dash 244 grooves. Rated at 70 durometer (hard), it delivers reliable compression set resistance along with strong tear and abrasion resistance. Operating temperature range spans -40 degrees F to 250 degrees F. Installation is performed by licensed plumbers, HVAC technicians, and mechanical contractors working across hydraulic, pneumatic, and fluid-handling systems.

This O-ring is suited for residential and commercial applications involving petroleum-based fluids, oils, fuels, and hydraulic media. Typical install scenarios include pump housings, valve bodies, pipe flanges, and fluid-line fittings where a Dash 244 groove profile is specified. Its compatibility with petroleum products makes it a common choice in HVAC refrigeration circuits, plumbing supply systems, and industrial fluid transfer assemblies. It meets SAE and MIL-Spec standards, confirming dimensional and material conformance for demanding service environments.

Key Features

• Buna-N (NBR) elastomer offers excellent resistance to petroleum products, oils, and hydraulic fluids
• 70 durometer hardness rating provides firm compression set and dimensional stability under load
• Operating range of -40 degrees F to 250 degrees F suits a broad range of service conditions
• Round cross-section profile conforms to standard Dash 244 groove specifications
• Meets SAE and MIL-Spec standards for dimensional and material compliance
• Strong tear and abrasion resistance extends service life in dynamic and static sealing applications

Compatibility

Designed for use in any application requiring a standard Dash 244 O-ring groove; compatible with petroleum products, oils, fuels, and hydraulic media. Not recommended for exposure to ozone, direct sunlight during storage, or proximity to motors and electrical equipment that generate ozone.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or industrial mechanics following applicable codes such as ASME or IPC for piping systems. Always depressurize and de-energize the system before removing or replacing O-rings. Lubricate the O-ring with a compatible fluid prior to seating to prevent pinching or tearing during assembly. Do not store unused O-rings in direct sunlight or near ozone-generating equipment such as motors.