Value Collection ZMSCE70139 Epdm O-ring Dash 139 25-pack

Product Description

The VALUE COLLECTION ZMSCE70139 is a Dash 139 EPDM O-ring designed for static and dynamic sealing applications in plumbing, HVAC, and hydraulic systems. It measures 2.188 inches inside diameter, 2.375 inches outside diameter, and 0.094 inches thick with a round cross section. Made from Ethylene Propylene Diene Monomer (EPDM) compound with a Shore A hardness of 70, this O-ring is rated for service from -65 degrees F to 300 degrees F. Each package contains 25 pieces, making it well-suited for contractors and technicians who need job-lot quantities on hand for recurring maintenance or installation work.

This O-ring is used in hot water systems, steam service, and phosphate ester type hydraulic fluid applications. It is also noted for its resistance to Skydrol fluids used in commercial aircraft hydraulic systems. Typical install scenarios include pump seals, valve stems, and flange face seals in residential and commercial plumbing, HVAC hydronic systems, and industrial fluid-handling assemblies. Plumbers, pipefitters, and HVAC technicians working with hot water or steam distribution are the primary installers.

Key Features

• EPDM compound rated from -65 degrees F to 300 degrees F for hot water and steam service
• Dash 139 standard sizing: 2.188 inches ID, 2.375 inches OD, 0.094 inches thick
• Shore A hardness of 70 for reliable compression seal in standard grooves
• Round cross section for uniform sealing contact
• Compatible with hot water, steam, and phosphate ester hydraulic fluids
• 25-piece package quantity suits field stock and bulk service calls

Compatibility

Suited for hot water, steam, and phosphate ester fluid systems where an EPDM Dash 139 O-ring is specified. Also compatible with Skydrol-type hydraulic fluids used in commercial aircraft hydraulic systems. Not FDA approved; confirm material suitability before use in food-contact or potable water applications.

Installation Notes

O-rings should be installed by a qualified plumber, pipefitter, or HVAC technician. Shut off system pressure and depressurize the line completely before replacing any seal. Inspect the groove and mating surfaces for burrs or damage before seating the new O-ring. Avoid twisting or rolling the ring during installation to prevent spiral failure; lubricate with a fluid compatible with EPDM before seating.