Value Collection ZMSCS70437 Silicone O-ring Dash 437

Product Description

The VALUE COLLECTION ZMSCS70437 is a silicone O-ring with a round cross section, used for static and dynamic sealing applications in fluid and gas systems. It measures 6 inches inside diameter, 6.5 inches outside diameter, and 0.25 inches thick, placing it in the Dash 437 size classification. Rated at 70 durometer hardness, this ring delivers a firm seal under mechanical compression. Its silicone compound supports a wide service temperature range, from -80 degrees F to 450 degrees F, making it suitable where standard Buna-N or EPDM materials fall short. Licensed plumbers, HVAC technicians, and maintenance mechanics install this type of seal in equipment requiring reliable performance under thermal cycling or dry heat exposure.

This O-ring is suited for use in residential and commercial mechanical systems where broad temperature tolerance and resistance to weathering, ozone, and dry heat are required. Typical applications include pump housings, pipe flanges, valve bodies, and equipment covers where a large-diameter face seal or groove seal is needed. The silicone material also provides limited resistance to oils, chemicals, and solvents, expanding its usability across general maintenance and light industrial scenarios. Package quantity is 1 piece.

Key Features

• Silicone compound rated from -80 degrees F to 450 degrees F continuous service
• Round cross section, 0.25 inches thick, Dash 437 standard sizing
• 70 durometer hardness rating for firm compression sealing
• Good weather and ozone resistance for indoor and outdoor installations
• Compatible with oils, chemicals, and solvents in light-duty exposure
• White color for visual identification during inspection and installation

Compatibility

Designed as an OEM-style replacement or service O-ring for large-diameter sealing applications requiring a Dash 437 silicone ring with 6 inch inside diameter and 0.25 inch cross section thickness.

Installation Notes

A licensed plumber, HVAC technician, or qualified maintenance mechanic should install this O-ring. Before service, shut down the system and relieve all pressure and fluid from the line or housing being serviced. Inspect the groove or seating surface for scoring or debris before seating the ring. Do not use petroleum-based lubricants with silicone O-rings; use a silicone-compatible assembly lubricant if needed.