Value Collection ZMSCS70312 Silicone O-ring Dash 312

Product Description

The VALUE COLLECTION ZMSCS70312 is a Dash 312 silicone O-ring designed for static and dynamic sealing applications across HVAC, plumbing, and general mechanical systems. The round cross-section ring measures 0.625 inches inside diameter, 1.000 inches outside diameter, and 0.1875 inches thick. With a Shore A hardness of 70 and a working temperature range of -80 degrees F to 450 degrees F, this O-ring is suited for applications that demand wide thermal tolerance and reliable dry heat resistance. Licensed trades and maintenance technicians install this part as a sealing component in fluid-handling assemblies, valve bodies, and mechanical fittings. Each package contains 10 O-rings.

This O-ring is appropriate for residential and commercial installations where silicone sealing material is specified. Typical applications include HVAC equipment service ports, plumbing valve seats, pump housings, and other assemblies exposed to oils, chemicals, or solvents. The silicone compound provides good weather and ozone resistance, making it suitable for both indoor and outdoor service environments. It is not rated for high-oil-concentration environments where nitrile or fluorocarbon compounds would be preferred. Installers should verify Dash 312 sizing matches the gland specifications before installation.

Key Features

• Silicone compound rated for a wide temperature range of -80 degrees F to 450 degrees F
• Round cross-section profile in standard Dash 312 size for consistent gland fit
• Shore A hardness of 70 for firm sealing under compression
• Good weather and ozone resistance for indoor and outdoor service use
• Compatible with oils, chemicals, and solvents in limited concentrations
• Packaged in quantities of 10 to support service calls and repair stock

Compatibility

Designed as a standard Dash 312 O-ring replacement for any gland or groove machined to the Dash 312 dimensional standard, including valve bodies, fittings, pump housings, and mechanical assemblies requiring a 0.625-inch inside diameter silicone seal.

Installation Notes

Installation is performed by licensed HVAC technicians, plumbers, or qualified mechanical trades. Depressurize and isolate the system before removing any existing seal or fitting. Inspect the gland or groove for wear, scoring, or contamination before seating the new O-ring. Do not use petroleum-based lubricants with silicone O-rings; use a silicone-compatible lubricant only to ease installation and reduce the risk of tearing.