Value Collection ZMSCS70281 Silicone O-ring Dash 281

Product Description

The VALUE COLLECTION ZMSCS70281 is a Dash 281 silicone O-ring with a round cross section, designed for static and dynamic sealing applications across a wide range of operating conditions. It measures 15 inches inside diameter, 15.25 inches outside diameter, and 0.125 inches thick. The silicone compound delivers a working temperature range of -80 degrees F to 450 degrees F, making it suitable for applications that demand both low-temperature flexibility and high dry-heat resistance. Durometer hardness is rated at 70, placing it in the hard category. This O-ring is installed by plumbers, HVAC technicians, industrial mechanics, and pool service professionals wherever a large-diameter silicone seal is required.

This O-ring is suited for residential and commercial installations where exposure to wide temperature swings, outdoor weathering, or ozone is a concern. Its silicone material provides good weather and ozone resistance along with limited oil resistance, making it appropriate for dry-heat environments, certain chemical exposures, and applications involving solvents. It is not FDA approved and should not be specified for food-contact or pharmaceutical sealing without independent verification of compliance requirements. Typical applications include large-bore pipe flanges, equipment housings, and tank covers in HVAC, plumbing, and industrial process systems.

Key Features

• Silicone compound rated from -80 degrees F to 450 degrees F for wide thermal range service
• Round cross section at 0.125 inches thickness for standard groove fitment
• 70 durometer hardness provides firm compression and reliable sealing under load
• Good weather and ozone resistance for outdoor or exposed installations
• Compatible with oils, chemicals, and solvents within silicone material limits
• Dash 281 designation for cross-reference ordering and groove specification

Compatibility

Designed as an OEM-style replacement or service seal for large-bore applications specifying a Dash 281 silicone O-ring with a 15-inch inside diameter and 0.125-inch cross section.

Installation Notes

Installation should be performed by a qualified tradesperson following the equipment manufacturer's groove and compression specifications. Shut down and depressurize the system fully before removing or installing any O-ring seal. Avoid rolling, twisting, or overstretching the O-ring during installation, as silicone compounds are more susceptible to tearing than nitrile or EPDM alternatives. Verify chemical compatibility with the specific media in the system before installation.