Value Collection ZMSCE70129 Epdm O-ring Dash 129

Product Description

The VALUE COLLECTION ZMSCE70129 is a Dash 129 EPDM O-ring with a round cross section, designed for static and dynamic sealing applications in fluid handling, hydraulic, and plumbing systems. Built from Ethylene Propylene Diene Monomer (EPDM) compound, it carries a Shore A hardness rating of 70 and holds a working temperature range of -65 degrees F to 300 degrees F. At 1.563 inches inside diameter, 1.75 inches outside diameter, and 0.094 inches thick, this O-ring seats into standard Dash 129 grooves. Installation is handled by plumbers, pipefitters, and hydraulic system technicians working on hot-water, steam, and phosphate ester fluid circuits.

This O-ring is well suited for hot-water systems, steam service, and phosphate ester type hydraulic fluids, including Skydrol fluids used in commercial aircraft hydraulic systems. Typical applications include pump seals, valve stems, pipe unions, and hydraulic fittings where EPDM compatibility with the service fluid is required. The package contains 25 O-rings, making it practical for service kits or bench stock. Residential and commercial plumbing, industrial fluid systems, and aerospace ground-support equipment are all common deployment environments.

Key Features

• EPDM material provides excellent resistance to Skydrol hydraulic fluids used in commercial aircraft systems
• Rated for hot water and steam service up to 300 degrees F
• Compatible with phosphate ester type hydraulic fluids
• Shore A hardness of 70 for firm, reliable groove seating
• Round cross section conforms to standard Dash 129 groove dimensions
• Sold in a pack of 25 for bench stock and service kit use

Compatibility

Compatible service media include hot water, steam, and phosphate ester hydraulic fluids such as Skydrol. Fits standard Dash 129 O-ring groove dimensions as defined by AS568 dash numbering. Not FDA approved for food-contact applications.

Installation Notes

Shut down and depressurize the system completely before replacing any O-ring. Inspect the groove for scoring, debris, or corrosion before seating the new ring. Lubricate the O-ring with a compatible fluid or grease rated for EPDM material to prevent rolling or pinching during assembly. Follow applicable plumbing or hydraulic system codes, including IPC or manufacturer torque specifications for the fitting or port being serviced.