Value Collection ZMSCH70FDA231 O-ring Dash 231 Nbr 10-pack

Product Description

The VALUE COLLECTION ZMSCH70FDA231 is a Dash 231 O-ring manufactured from Buna-N (Nitrile Butadiene Rubber), the most widely used elastomer in fluid-sealing applications. It measures 2.609 inches inside diameter, 2.875 inches outside diameter, and 0.125 inches thick with a round cross section. Hardness is rated at 70 Shore A. This O-ring carries FDA approval and meets SAE and MIL-Spec standards, making it suitable for both food-grade and industrial sealing requirements. Each package contains 10 O-rings. Licensed tradespeople and maintenance technicians in HVAC, plumbing, and fluid-system service routinely specify this compound for petroleum-service applications.

Buna-N O-rings in the Dash 231 size see widespread use across residential and commercial systems involving hydraulic lines, refrigerant service ports, water supply connections, and pneumatic fittings. The material provides excellent resistance to petroleum-based fluids, oils, and fuels. The FDA-approved white compound extends its use to potable water, food processing, and sanitary plumbing systems where material compliance is required. Operating temperature range spans -40 degrees F to 250 degrees F, covering most heating, cooling, and process-fluid service conditions encountered in the field.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound — excellent resistance to petroleum products, oils, and fuels
• FDA approved white compound suitable for food-grade and potable water applications
• Meets SAE and MIL-Spec standards
• 70 Shore A hardness with excellent compression set, tear, and abrasion resistance
• Operating range: -40 degrees F to 250 degrees F
• Round cross section for consistent sealing in standard O-ring grooves

Compatibility

Compatible with petroleum products and petroleum-based fluid systems. Suitable for use wherever Dash 231 Buna-N O-rings are specified in HVAC, plumbing, hydraulic, and pneumatic service applications. Should not be used with ozone-generating environments, direct sunlight exposure, or near electric motors that produce ozone.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or hydraulic system technicians following applicable code requirements such as ASME or IPC guidelines. Always depressurize and de-energize the system and drain fluid before removing or replacing O-rings. Lubricate the O-ring with a compatible lubricant — use only lubricants rated for Buna-N and compatible with the system fluid — to ease installation and prevent tearing. Do not stretch or twist the O-ring during installation.