Value Collection ZMSCV70379 Viton O-ring Dash 379

Product Description

The VALUE COLLECTION ZMSCV70379 is a Dash 379 Viton (fluoroelastomer) O-ring used to create static or dynamic seals in fluid and gas systems. It measures 11 inches inside diameter, 11.375 inches outside diameter, and 0.1875 inches thick with a round cross section. At 70 Shore A hardness, this is a hard-rated O-ring suited for applications that demand dimensional stability under load. Fluoroelastomer construction provides strong resistance to petroleum-based fluids, low compression set, and high-temperature service up to 400 degrees F. Licensed HVAC technicians, plumbers, pipefitters, and industrial maintenance professionals use this style of large-diameter O-ring in sealing flanged connections, pump housings, valves, and fluid-transfer assemblies.

This O-ring is suited for residential and commercial systems where exposure to petroleum products, hydraulic fluids, or elevated temperatures is a factor. Its wide chemical compatibility and low gas permeability make it a reliable choice for vacuum service applications and systems requiring a consistent, long-lasting seal. The large 11-inch ID places it in applications such as large-bore valve bodies, tank covers, pump flanges, and pressure vessel closures where a precision-dimensioned seal is critical to system integrity.

Key Features

• Fluoroelastomer (Viton) construction rated for service from -15 degrees F to 400 degrees F
• 70 Shore A hardness (hard rating) for dimensional stability under compression
• Round cross section, 0.1875 inches thick, for consistent seating in standard O-ring grooves
• Good resistance to petroleum products and a wide spectrum of chemical compatibility
• Low gas permeability makes this suitable for vacuum service applications
• Low compression set helps maintain sealing force over extended service intervals

Compatibility

Designed as an OEM-style replacement or maintenance seal for large-bore fluid and gas system components requiring a Dash 379 O-ring with fluoroelastomer material and 70 Shore A hardness. Compatible with petroleum-based media. Not FDA approved.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, HVAC technicians, or industrial mechanics. Depressurize and drain the system fully before removing the old O-ring or installing this part. Inspect the mating groove for nicks, scoring, or debris that could compromise the seal. Lightly lubricate the O-ring with a fluid compatible with fluoroelastomer before seating to prevent twisting or tearing during assembly.