Value Collection ZMSCE70NSF250 O-ring Dash 250 Epr 10-pack

Product Description

The VALUE COLLECTION ZMSCE70NSF250 is an Ethylene Propylene Rubber (EPR) O-ring with a round cross section, sized to Dash 250 standards. It measures 5 inches inner diameter, 5.25 inches outer diameter, and 0.125 inches thick. With a 70 Shore A hardness rating, this O-ring is formulated for demanding fluid-sealing applications where resistance to heat, steam, and aggressive hydraulic fluids is required. It is used by plumbers, mechanical contractors, and maintenance technicians in systems carrying hot water, steam, and phosphate ester hydraulic fluids. Each package contains 10 O-rings.

This O-ring is suited for residential and commercial plumbing, industrial fluid systems, and hydraulic applications requiring reliable sealing across a wide temperature range. It is especially well-suited for use with Skydrol-type phosphate ester hydraulic fluids common in commercial aircraft ground-support and hydraulic maintenance applications. It also performs in hot water and steam service, and shows resistance to select acids, alkalies, and ozone exposure. NSF 61 certification makes it appropriate for potable water system components where that listing is required.

Key Features

• Ethylene Propylene Rubber construction provides excellent resistance to hot water, steam, and phosphate ester hydraulic fluids
• Rated for temperatures from -65 degrees F to 300 degrees F
• 70 Shore A hardness — rated Hard — for firm, reliable compression sealing
• Round cross section, Dash 250 sizing for standardized fitment
• NSF 61 listed for potable water system compatibility
• Resistant to select acids, alkalies, and ozone

Compatibility

Designed for use in systems handling hot water, steam, and phosphate ester type hydraulic fluids including Skydrol-type fluids used in commercial aircraft hydraulic systems. NSF 61 approval supports use in potable water contact applications. Not FDA approved.

Installation Notes

O-ring installation should be performed by a qualified plumber, pipefitter, or hydraulic system technician. Always depressurize and drain the system before removing or replacing seals. Inspect the seating groove for damage, corrosion, or contamination before installing the new O-ring. Avoid twisting the O-ring during installation; use a compatible lubricant approved for EPR compounds and the fluid being sealed.