Value Collection ZMSCH70MD219 O-ring Dash 219 Nbr 70A

Product Description

The VALUE COLLECTION ZMSCH70MD219 is a Dash 219 nitrile butadiene rubber (NBR) O-ring designed for static and dynamic sealing applications across plumbing, hydraulic, pneumatic, and fluid-handling systems. It measures 1.296 inches inside diameter, 1.562 inches outside diameter, and 0.125 inches thick with a round cross section. Shore A hardness is rated at 70, placing it in the hard range for solid compression set resistance. NBR is the most widely used O-ring elastomer in the trade, offering strong resistance to petroleum-based fluids, oils, and fuels. Plumbers, hydraulic technicians, and HVAC service professionals regularly use this grade for sealing fittings, valve stems, and pump connections.

This O-ring is suited for a broad range of residential and commercial applications wherever petroleum-product compatibility is required. Typical install scenarios include hydraulic cylinder rod seals, pump housing seals, threaded fitting face seals, and fluid-control valve assemblies. The working temperature range of -40 degrees F to 250 degrees F makes it appropriate for most indoor mechanical and refrigeration-adjacent plumbing applications. Sold in a package quantity of 10, it is a practical shop or service-van stocking item for technicians who replace O-rings regularly during preventive maintenance or repair calls.

Key Features

• Nitrile butadiene rubber compound offers excellent resistance to petroleum products, oils, and fuels
• 70 Shore A hardness provides strong compression set resistance and long-term sealing integrity
• Round cross section for consistent contact area and predictable load distribution in standard O-ring grooves
• Operating range of -40 degrees F to 250 degrees F covers most mechanical and plumbing service conditions
• Good tear and abrasion resistance for dynamic sealing applications with moving components
• Package of 10 units supports service-van stocking and scheduled maintenance kits

Compatibility

Compatible with petroleum products and petroleum-based hydraulic fluids. Designed as a standard Dash 219 O-ring replacement for use in any groove or fitting that accepts the 1.296 inches ID by 1.562 inches OD by 0.125 inches cross-section profile. Not recommended for use with ozone-generating equipment or in direct sunlight storage.

Installation Notes

Installation is typically performed by plumbers, hydraulic technicians, or HVAC service professionals during component disassembly and reassembly. Always depressurize and de-energize the system before replacing O-rings. Lightly lubricate the O-ring with a compatible fluid or assembly lubricant before seating it in the groove to prevent tearing during installation. Do not overstretch the ring onto the fitting and inspect the mating groove for nicks or burrs that could compromise the seal.