Value Collection ZMSCS70217 Silicone O-ring Dash 217

Product Description

The VALUE COLLECTION ZMSCS70217 is a Dash 217 silicone o-ring designed for static and dynamic sealing applications across a broad temperature range. It measures 1.188 inches inside diameter, 1.438 inches outside diameter, and 0.125 inches thick, with a round cross-section profile. The white silicone compound carries a Shore A hardness of 70 and is rated for continuous service from -80 degrees F to 450 degrees F. HVAC technicians, plumbers, and industrial maintenance professionals use this o-ring where standard nitrile or EPDM compounds fall short in dry-heat or ozone-heavy environments.

This o-ring is suited for residential and commercial HVAC systems, plumbing assemblies, and general industrial equipment that requires a reliable face seal or radial seal in high-temperature or outdoor-exposed service. Its silicone compound provides good weather and ozone resistance, making it a practical choice for rooftop units, outdoor fluid lines, and equipment subject to UV exposure. It offers limited oil resistance, so applications involving heavy petroleum-based fluids should use a different compound.

Key Features

• Wide service temperature range: -80 degrees F to 450 degrees F
• Shore A hardness of 70 rated Hard for consistent sealing under compression
• Round cross-section profile for standard groove fitment
• Good weather and ozone resistance for outdoor and rooftop service
• Compatible with oils, chemicals, and solvents within silicone service limits
• White silicone compound for easy visual inspection during installation

Compatibility

Designed as an OEM-style replacement or service o-ring for Dash 217 standard-groove applications in HVAC, plumbing, and general industrial equipment requiring a 1.188-inch ID silicone seal.

Installation Notes

Installation should be performed by a qualified HVAC technician, plumber, or industrial mechanic. De-energize and depressurize the system fully before removing the old o-ring and seating the replacement. Lightly lubricate the o-ring with a silicone-compatible lubricant before installation to prevent tearing during assembly. Avoid using petroleum-based greases, as they can degrade the silicone compound over time.