Value Collection ZMSCH70234 O-ring Dash 234 Buna-n 70A

Product Description

The VALUE COLLECTION ZMSCH70234 is a Dash 234 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), one of the most widely used elastomers in fluid-sealing applications. It measures 3 inches inside diameter by 3.25 inches outside diameter with a 0.125-inch cross section, and carries a 70 Shore A hardness rating. The round cross-section profile seats reliably in standard AN and SAE O-ring grooves. Licensed plumbers, HVAC technicians, and mechanical service pros use this O-ring when servicing pumps, valves, fittings, and hydraulic or pneumatic assemblies exposed to petroleum-based fluids. It is rated for continuous service from -40 degrees F to 250 degrees F.

This O-ring is suited for static and dynamic sealing applications in residential and light commercial systems involving petroleum products, hydraulic oils, fuels, and many common lubricants. Typical installations include pump shaft seals, pipe union seals, valve stem packing applications, and hydraulic cylinder end caps. The Dash 234 designation corresponds to the standard AS568 size series, making it a direct drop-in for equipment specified to that dash number. Sold in a package quantity of 50 units, this SKU is practical for shops and field service kits that go through high volumes of common seal sizes.

Key Features

• Buna-N (NBR) compound provides excellent resistance to petroleum products, hydraulic oils, and fuels
• 70 Shore A hardness delivers firm compression set and strong resistance to extrusion under pressure
• Rated from -40 degrees F to 250 degrees F for broad service-temperature coverage
• Round cross-section conforms to SAE and MIL-Spec standards for Dash 234 O-rings
• Good tear and abrasion resistance extends service life in dynamic sealing applications
• Package quantity of 50 units supports shop stock and bulk field use

Compatibility

Designed as a standard AS568 Dash 234 replacement O-ring compatible with petroleum products and equipment meeting SAE and MIL-Spec O-ring groove standards for a 3-inch ID seal. Not compatible with ozone-generating environments, direct sunlight storage, or applications requiring FDA-approved materials.

Installation Notes

Installation should be performed by a qualified plumber, HVAC technician, or mechanical service professional. Shut off and depressurize the system completely before removing any seals or fittings. Lubricate the O-ring lightly with a compatible fluid or assembly lubricant before seating to prevent twisting or nicking during installation. Do not store unused O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade Buna-N compounds.