Value Collection ZMSCH70MD272 O-ring Dash 272 Buna-n

Product Description

The VALUE COLLECTION ZMSCH70MD272 is a Dash 272 O-ring manufactured from Buna-N (Nitrile Butadiene Rubber), one of the most widely used elastomers in sealing applications. It features a 9.484-inch inside diameter, a 9.75-inch outside diameter, and a 0.125-inch round cross section with a Shore hardness of 70. The black Buna-N compound delivers excellent resistance to petroleum-based fluids, strong compression set performance, and solid tear and abrasion resistance. Licensed HVAC technicians, plumbers, and fluid-system mechanics install this part as a static or dynamic face seal in a wide range of industrial and trade applications. Each package contains 2 O-rings.

This O-ring is suited for residential and commercial fluid-handling systems where petroleum-based lubricants, hydraulic fluids, or fuel contact is expected. Its Dash 272 sizing makes it a standard replacement in pumps, compressors, valves, and pipe fittings that call for this cross-section profile. The rated temperature range of -40 degrees F to 250 degrees F covers most HVAC, plumbing, and light industrial service conditions. It is not FDA approved for food-contact use, though the supplier notes a metal-detectable FDA variant designation in additional information.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction with excellent petroleum product resistance
• Dash 272 standard sizing: 9.484 inches ID, 9.75 inches OD, 0.125 inches thick
• Shore hardness of 70 for firm compression set and abrasion resistance
• Operating temperature range: -40 degrees F to 250 degrees F
• Round cross section for consistent sealing in standard O-ring grooves
• Sold in a 2-piece package; minimum order quantity of 1 package

Compatibility

Designed as a standard Dash 272 replacement O-ring compatible with petroleum-based fluid systems including hydraulic circuits, fuel systems, compressors, pumps, and valves that specify a Buna-N seal at this cross-section size. Not recommended for use with ozone-generating environments or direct sunlight exposure in storage.

Installation Notes

Installation is performed by HVAC technicians, plumbers, or mechanics servicing fluid-handling equipment. Always depressurize and de-energize the system before replacing any O-ring seal. Inspect the groove and mating surfaces for scoring or debris before seating the new ring. Avoid stretching the O-ring beyond the groove diameter during installation, and do not store unused rings near motors, ozone-generating equipment, or in direct sunlight.