Value Collection ZMSCS70247 Silicone O-ring Dash 247 5 Pack

Product Description

The VALUE COLLECTION ZMSCS70247 is a Dash 247 silicone O-ring with a round cross section, measuring 4.625 inches inside diameter, 4.875 inches outside diameter, and 0.125 inches thick. Rated at 70 durometer (hard), it is engineered for sealing applications that demand a wide operating temperature range, spanning -80 degrees F to 450 degrees F. The silicone compound provides good dry heat resistance along with good weather and ozone resistance. Each order includes a pack of 5 rings. Plumbers, HVAC technicians, and maintenance mechanics install this type of O-ring in fluid and gas sealing applications where thermal cycling is a primary concern.

This O-ring is suited for residential and commercial sealing applications involving oils, chemicals, and solvents where silicone elastomer compatibility is acceptable. Its wide temperature tolerance makes it a practical choice for HVAC equipment, plumbing fixtures, pumps, and process piping that experience both low-temperature cold starts and sustained high-heat operating conditions. Note that silicone has limited oil resistance compared to nitrile or Viton compounds, so verify fluid compatibility before installation. The round cross section seats consistently in standard O-ring grooves machined to Dash 247 dimensions.

Key Features

• Silicone elastomer rated from -80 degrees F to 450 degrees F for wide thermal range service
• 70 durometer hard rating provides firm, consistent groove seating
• Round cross section for uniform compression and predictable sealing force
• Compatible with oils, chemicals, and solvents per manufacturer designation
• Good weather and ozone resistance extends service life in exposed installations
• Sold in a pack of 5, minimum order quantity of 1 pack

Compatibility

Designed for standard Dash 247 O-ring groove applications requiring a 4.625-inch inside diameter, 4.875-inch outside diameter, and 0.125-inch cross section thickness in silicone elastomer.

Installation Notes

O-ring installation should be performed by a qualified plumber, pipefitter, or HVAC technician following applicable IPC or IFGC code requirements for the specific system. Depressurize and isolate the system before removing any sealing components. Inspect the groove for burrs, corrosion, or damage that could compromise the seal before seating the new ring. Do not overstretch the O-ring during installation, and confirm silicone compatibility with the process fluid before placing the system back in service.