Value Collection ZMSCS70271 Silicone O-ring Dash 271

Product Description

The VALUE COLLECTION ZMSCS70271 is a round cross-section silicone O-ring sized to Dash 271 standards, with a 9.25-inch inside diameter, 9.5-inch outside diameter, and 0.125-inch thickness. Rated at 70 Shore A hardness, this white silicone ring is engineered for wide-temperature-range sealing applications from -80 degrees F to 450 degrees F. Plumbers, HVAC technicians, and industrial maintenance professionals install it wherever a large-diameter face seal or radial seal is required. Silicone construction provides good resistance to dry heat, weathering, and ozone, making it a practical choice for both indoor and outdoor service environments.

This O-ring is suited for use in systems that encounter elevated or sub-zero temperatures where standard rubber compounds would degrade. It performs reliably in contact with oils, certain chemicals, and solvents, though oil resistance is noted as limited. Typical installation scenarios include large-diameter pipe flanges, equipment access covers, pump housings, and similar sealing points in commercial HVAC, plumbing, and light industrial equipment. The Dash 271 designation allows straightforward cross-referencing to confirm fitment against standard O-ring size charts.

Key Features

• Silicone construction rated for -80 degrees F to 450 degrees F operating range
• Round cross-section profile, 0.125 inches thick, for consistent radial and face sealing
• 70 Shore A hardness provides firm compression resistance across a range of flange loads
• Good weather and ozone resistance for outdoor or exposed installations
• Compatible with oils, chemicals, and solvents; note limited oil resistance in high-concentration environments
• Standard Dash 271 sizing enables easy cross-reference to replacement specifications

Compatibility

Designed as a standard Dash 271 O-ring replacement for large-diameter sealing applications in HVAC, plumbing, and industrial equipment where silicone elastomer is specified.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or maintenance mechanics. Depressurize and drain the system fully before removing the old O-ring and seating the replacement. Inspect the groove for nicks, corrosion, or debris that could compromise the seal. Do not stretch the ring beyond its natural elasticity during installation, and avoid using petroleum-based lubricants with silicone O-rings unless the lubricant is confirmed compatible.