Value Collection ZMSCS70265 Silicone O-ring Dash 265

Product Description

The VALUE COLLECTION ZMSCS70265 is a Dash 265 silicone O-ring designed for static and dynamic sealing applications across HVAC, plumbing, and industrial systems. It measures 7.75 inches inside diameter and 8 inches outside diameter, with a 0.125-inch round cross section. The silicone compound carries a 70 Shore A hardness rating and is rated for service from -80 degrees F to 450 degrees F, making it well suited for high-temperature and wide-range thermal cycling environments. Technicians and maintenance professionals install this part wherever a large-diameter silicone seal is required at flanged joints, access covers, or equipment housings.

This O-ring is used in residential and commercial applications where the sealing surface demands resistance to dry heat, weathering, and ozone exposure. Typical installation scenarios include large-bore pipe flanges, HVAC equipment access panels, pump housings, and similar assemblies in which a reliable perimeter seal must withstand elevated temperatures or outdoor exposure. The silicone material provides good compatibility with oils, chemicals, and solvents, though users should note that oil resistance is limited compared to nitrile compounds.

Key Features

• Wide service temperature range: -80 degrees F to 450 degrees F for high-heat and cold-weather applications
• 70 Shore A hardness provides firm, stable compression set across the sealing surface
• Round cross section ensures consistent contact area on standard O-ring groove profiles
• Good resistance to weathering, ozone, and dry heat extends service life in exposed installations
• Compatible with oils, chemicals, and solvents in a broad range of fluid-handling systems
• White silicone compound for visual identification in multi-material seal inventories

Compatibility

Designed as a Dash 265 standard O-ring replacement for any application requiring a 7.75-inch inside diameter, 8-inch outside diameter, 0.125-inch thick silicone seal with a round cross section.

Installation Notes

O-rings of this diameter are typically installed by licensed plumbers, HVAC technicians, or industrial maintenance mechanics working on flanged or gasketed assemblies. De-energize all electrical systems and shut off fluid supply lines before disassembling the joint. Ensure the O-ring groove is clean and free of debris, and do not roll or twist the ring during installation, as deformation can lead to premature seal failure. Verify groove dimensions match the Dash 265 standard before installation.