Value Collection ZMSCS70131 Silicone O-ring Dash 131 25pk

Product Description

The VALUE COLLECTION ZMSCS70131 is a Dash 131 silicone O-ring with a round cross section, designed for static and dynamic sealing applications across HVAC, plumbing, and fluid-handling systems. It measures 1.688 inches inside diameter, 1.875 inches outside diameter, and 0.094 inches thick. The silicone compound carries a Shore A hardness of 70 and is rated for service from -80 degrees F to 450 degrees F, making it well suited for applications that require wide thermal range performance and dry heat resistance. Each package contains 25 rings. This O-ring is installed by licensed HVAC technicians, plumbers, and mechanical service professionals.

This O-ring is appropriate for sealing duties in residential and light commercial HVAC equipment, plumbing connections, and chemical or solvent-handling assemblies where silicone elastomer is compatible with the process media. The silicone material provides good weather and ozone resistance, making it a practical choice for outdoor or exposed service environments. It is not recommended for continuous immersion in oils or petroleum-based fluids, where alternative elastomers such as Buna-N or Viton would be more suitable. The round cross section seats into standard Dash 131 gland geometries without modification.

Key Features

• Dash 131 standard sizing: 1.688 inches ID x 1.875 inches OD x 0.094 inches thick
• Silicone compound rated -80 degrees F to 450 degrees F for wide thermal range service
• Shore A hardness of 70 for consistent sealing load and compression set resistance
• Good weather and ozone resistance for outdoor or exposed installations
• Compatible with oils, chemicals, and solvents in limited-exposure applications
• Round cross section seats in standard Dash 131 gland geometry

Compatibility

Designed as a standard Dash 131 O-ring replacement for any gland machined to AS568 Dash 131 dimensions in HVAC, plumbing, and fluid-handling equipment. Compatible with oils, chemicals, and solvents as noted by the manufacturer; limited oil resistance applies.

Installation Notes

Licensed HVAC technicians and plumbers should isolate and de-pressurize the system before removing or installing any O-ring seal. Inspect the gland groove for burrs or corrosion that could damage the new ring during assembly. Lightly lubricating the O-ring with a compatible grease or silicone lubricant eases installation and reduces the risk of tearing. Follow applicable mechanical and plumbing codes for pressure-rated joint reassembly.