Value Collection ZMSCE70355 Epdm O-ring Dash 355 10-pack

Product Description

The VALUE COLLECTION ZMSCE70355 is a Dash 355 EPDM O-ring with a round cross section, sized at 5.25 inches inside diameter, 5.625 inches outside diameter, and 0.1875 inches thick. Rated at 70 durometer (hard), this O-ring is engineered for sealing applications in hot water, steam, and phosphate ester hydraulic systems. The ethylene propylene diene monomer compound delivers strong resistance to thermal degradation across a wide temperature range of -65 degrees F to 300 degrees F. Each order includes a package of 10 O-rings. Licensed plumbers, HVAC technicians, and hydraulic system technicians are the typical installers.

This O-ring is suited for residential and commercial sealing applications involving hot water lines, steam systems, and phosphate ester type hydraulic fluids. It is also noted for excellent resistance to Skydrol fluids used in commercial aircraft hydraulic systems. The Dash 355 designation identifies the standardized sizing for straightforward cross-referencing and procurement. Its black EPDM construction makes it a practical choice for plumbing, hydronic heating, and fluid power maintenance work where high-temperature compatibility is required.

Key Features

• EPDM compound rated for temperatures from -65 degrees F to 300 degrees F
• 70 durometer (hard) hardness rating for firm, reliable sealing under pressure
• Round cross section per Dash 355 standard sizing
• Compatible with hot water, steam, and phosphate ester hydraulic fluids
• Excellent resistance to Skydrol fluids used in commercial aircraft hydraulic systems
• Sold in a package of 10 for job-site or shop stock convenience

Compatibility

Compatible with hot water, steam, and phosphate ester type hydraulic fluid systems. Also suitable for applications involving Skydrol hydraulic fluids used in commercial aircraft systems. Not FDA approved.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or hydraulic system mechanics depending on the application. Shut off and depressurize the system fully before removing any fittings or replacing seals. Inspect the sealing groove for debris, scoring, or damage before seating the new O-ring. Avoid twisting or overstretching the O-ring during installation to maintain seal integrity.