Value Collection ZMSCH70MD229 O-ring Dash 229 Buna-n 5-pack

Product Description

The VALUE COLLECTION ZMSCH70MD229 is a Dash 229 O-ring made from Buna-N (Nitrile Butadiene Rubber), one of the most widely used elastomers in sealing applications across HVAC, plumbing, and fluid-handling systems. It measures 2.359 inches inside diameter, 2.625 inches outside diameter, and 0.125 inches thick, with a round cross section and a Shore A hardness of 70. Each package contains 5 rings. This O-ring delivers excellent resistance to petroleum-based fluids, strong compression set recovery, and solid tear and abrasion resistance, making it a reliable choice for technicians maintaining pumps, valves, fittings, and hydraulic or refrigerant-adjacent components.

This O-ring is suited for residential and light commercial applications where sealing against petroleum products, oils, fuels, and hydraulic fluids is required. Typical install scenarios include pump shaft seals, valve body seals, pipe union joints, and equipment flanges in HVAC, plumbing, and general mechanical service. The Dash 229 designation follows AS568 standard sizing, so it cross-references directly in parts lookup by dash number. Operating temperature range runs from -40 degrees F to 250 degrees F, covering most in-service conditions encountered in trade work. Not FDA approved for food-contact applications.

Key Features

• Buna-N elastomer with excellent resistance to petroleum products, oils, and hydraulic fluids
• Shore A hardness of 70 provides a firm, reliable seal under compression
• Round cross section, AS568 Dash 229 standard sizing for direct cross-reference
• Operating range of -40 degrees F to 250 degrees F suits most mechanical service environments
• Strong tear and abrasion resistance extends service life in dynamic and static sealing applications
• Sold in a pack of 5 to support field service kits and stocking needs

Compatibility

Designed as an OEM-style replacement or service O-ring for any application requiring an AS568 Dash 229 standard O-ring in Buna-N material. Compatible with petroleum products and hydraulic fluids. Store away from direct sunlight, ozone sources, and electrical equipment that may generate ozone to prevent premature degradation.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or mechanical service technicians. Always depressurize and isolate the system before removing or installing O-rings. Lightly lubricate the O-ring with a compatible fluid or grease before seating to prevent nicking or rolling during assembly. Inspect the mating groove for burrs or corrosion that could damage the new seal.