Value Collection ZMSCV70391 Viton O-ring Dash 391

Product Description

The VALUE COLLECTION ZMSCV70391 is a Dash 391 Viton O-ring with a round cross section, manufactured from fluoroelastomer compound at 70 Shore A hardness. It measures 22 inches inside diameter, 22.375 inches outside diameter, and 0.1875 inches (3/16 inches) thick. The fluoroelastomer construction delivers low compression set and high-temperature resistance, with a working range of -15 degrees F to 400 degrees F. This O-ring is well suited for static and dynamic sealing applications where petroleum product compatibility and low gas permeability are required. It is installed by plumbers, pipefitters, millwrights, and maintenance mechanics in industrial, commercial, and process piping systems.

This large-diameter O-ring is used in flanged connections, pump housings, tank covers, valve bonnets, and other assemblies requiring a reliable face or groove seal. The 22-inch ID size targets industrial and commercial equipment rather than residential plumbing. Its chemical compatibility with petroleum products makes it a common choice in fuel handling, hydraulic, and lubrication systems. Because this part is not FDA approved, it is not intended for direct food-contact or potable-water applications.

Key Features

• Fluoroelastomer (Viton) material provides broad chemical compatibility with petroleum products and fuels
• Working temperature range of -15 degrees F to 400 degrees F suits high-heat environments
• Low compression set maintains long-term sealing force over repeated thermal cycles
• Low gas permeability makes this O-ring appropriate for vacuum service
• 70 Shore A hardness rating classified as hard, reducing extrusion risk under pressure
• Round cross section fits standard O-ring grooves dimensioned to Dash 391 specifications

Compatibility

Designed as a standard Dash 391 O-ring replacement for industrial and commercial assemblies requiring a 22-inch ID fluoroelastomer seal; compatible material applications include petroleum products, fuels, hydraulic fluids, and environments demanding high-temperature or low-gas-permeability sealing. Not FDA approved and not suitable for direct food-contact or potable-water service.

Installation Notes

O-ring installation should be performed by a qualified mechanic, pipefitter, or maintenance technician. Before service, depressurize, de-energize, and fully drain the system being serviced in accordance with applicable OSHA lockout/tagout procedures. Inspect the groove and mating surfaces for damage or contamination before seating the O-ring, and apply a compatible lubricant to ease installation without stretching the ring beyond its elastic range. Do not use petroleum-based lubricants unless confirmed compatible with the fluoroelastomer compound.