Value Collection ZMSCS70139 Silicone O-ring Dash 139

Product Description

The VALUE COLLECTION ZMSCS70139 is a Dash 139 silicone O-ring with a round cross section, designed for static and dynamic sealing in systems that demand wide temperature tolerance and reliable dry heat resistance. It measures 2.188 inches inside diameter, 2.375 inches outside diameter, and 0.094 inches thick, with a 70 durometer hardness rating. The white silicone compound delivers good weather and ozone resistance, making it a practical choice where standard rubber compounds fall short. Licensed plumbers, HVAC technicians, and industrial maintenance technicians commonly specify silicone O-rings in this size class for fluid handling, HVAC assemblies, and general mechanical sealing applications.

This O-ring fits sealing applications that require performance across a broad temperature range, from -80 degrees F to 450 degrees F. It is appropriate for residential and commercial mechanical systems where exposure to dry heat, weathering, and ozone is a concern. The material offers limited oil resistance and is suitable for contact with oils, chemicals, and solvents within its rated parameters. Each package contains 10 pieces with a minimum order quantity of 1 package.

Key Features

• Wide service temperature range: -80 degrees F to 450 degrees F
• 70 durometer hardness for firm, consistent seal compression
• Round cross section for standard groove compatibility
• Good weather and ozone resistance for outdoor or exposed installations
• Compatible with oils, chemicals, and solvents within rated limits
• White silicone compound; Dash 139 industry-standard sizing

Compatibility

Designed as an OEM-style replacement silicone O-ring for mechanical, HVAC, plumbing, and industrial sealing applications requiring Dash 139 sizing with silicone compound compatibility.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or industrial mechanics. Depressurize and de-energize the system before O-ring replacement, and confirm the groove dimensions match Dash 139 specifications. Avoid using petroleum-based lubricants with silicone O-rings; use a silicone-compatible assembly lubricant if needed. Inspect the seating surface for nicks or corrosion before installing the new O-ring.