Value Collection ZMSCE70251 Epdm O-ring Dash 251 Pack 12

Product Description

The VALUE COLLECTION ZMSCE70251 is a Dash 251 EPDM O-ring with a round cross section, sized at 5.125 inches inside diameter, 5.375 inches outside diameter, and 0.125 inches thick. Molded from ethylene propylene diene monomer (EPDM) compound with a 70 durometer hardness rating, this O-ring delivers reliable sealing performance across a wide temperature range. It is suited for use by licensed plumbers, HVAC technicians, and maintenance professionals who need a durable, chemically compatible sealing element for demanding fluid system applications. Each package contains 12 O-rings.

This O-ring is designed for use in systems handling hot water, steam, and phosphate ester type hydraulic fluids. It also provides excellent resistance to Skydrol fluids used in commercial aircraft hydraulic systems. Typical installation scenarios include plumbing fittings, HVAC water-side components, industrial hydraulic assemblies, and other fluid-handling systems where EPDM chemical compatibility and broad temperature tolerance are required. The round cross-section profile seats reliably in standard O-ring grooves.

Key Features

• EPDM material rated for service from -65 degrees F to 300 degrees F
• 70 durometer hardness for firm, consistent compression sealing
• Compatible with hot water, steam, and phosphate ester hydraulic fluids
• Excellent resistance to Skydrol fluids used in commercial aircraft hydraulic systems
• Round cross-section seats in standard Dash 251 O-ring grooves
• Sold in a package of 12 for efficient stocking and service use

Compatibility

Compatible with systems handling hot water, steam, and phosphate ester type hydraulic fluids. Also rated for Skydrol fluid exposure in commercial aircraft hydraulic applications. Designed as an OEM-style replacement or service O-ring for any system requiring a Dash 251 EPDM seal.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or qualified maintenance mechanics. Always depressurize and drain the system completely before removing or installing O-rings. Inspect the groove for nicks, corrosion, or debris before seating the new O-ring. Follow applicable codes such as IPC or IFGC for fluid system service, and verify chemical compatibility with the specific fluid present in the system before installation.