Value Collection ZMSCE70203 Epdm O-ring Dash 203 Pack 100

Product Description

The VALUE COLLECTION ZMSCE70203 is a Dash 203 EPDM O-ring designed for static and dynamic sealing applications in plumbing, HVAC, and hydraulic systems. It measures 0.313 inches inside diameter, 0.563 inches outside diameter, and 0.125 inches thick with a round cross section. Made from Ethylene Propylene Diene Monomer (EPDM) compound with a hardness rating of 70 durometer, this O-ring delivers reliable sealing performance across a wide service temperature range of -65 degrees F to 300 degrees F. Each package contains 100 O-rings. Installation is handled by licensed plumbers, HVAC technicians, and hydraulic system technicians.

This O-ring is suited for hot water and steam service lines, phosphate ester type hydraulic fluid systems, and commercial aircraft hydraulic systems requiring resistance to Skydrol fluids. It is a practical choice for residential and commercial plumbing repairs, boiler system maintenance, and industrial hydraulic circuit servicing where EPDM compatibility with the process fluid has been confirmed. The Dash 203 designation makes cross-referencing to standard O-ring sizing charts straightforward for trade professionals.

Key Features

• EPDM material provides excellent resistance to hot water, steam, and phosphate ester hydraulic fluids
• Rated for Skydrol fluid exposure in commercial aircraft hydraulic systems
• Wide service temperature range: -65 degrees F to 300 degrees F
• 70 durometer hardness for a firm, reliable seal under pressure
• Round cross section conforms to standard Dash 203 O-ring groove dimensions
• Packaged in quantities of 100 for shop stock and service van inventory

Compatibility

Compatible with hot water, steam, and phosphate ester hydraulic fluid systems. Designed as a standard Dash 203 replacement O-ring for applications where EPDM compound is specified. Not recommended for petroleum-based oils, fuels, or aromatic solvents.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or hydraulic system technicians. Depressurize and isolate the system before removing the old O-ring and seating the replacement. Inspect the groove for nicks, burrs, or debris that could compromise the seal before installation. Avoid twisting or rolling the O-ring during installation, and verify chemical compatibility with the process fluid before use.