Value Collection ZMSCV70158 Viton O-ring Dash 158

Product Description

The VALUE COLLECTION ZMSCV70158 is a Dash 158 Viton O-ring with a round cross section, designed for static and dynamic sealing applications in fluid and gas systems. Made from fluoroelastomer, this O-ring measures 4.75 inches inside diameter, 4.938 inches outside diameter, and 0.094 inches thick. It carries a hardness rating of 70 Shore A, classified as hard. The fluoroelastomer compound delivers high temperature resistance up to 400 degrees F, a low compression set, and broad chemical compatibility, making it well suited for use in demanding sealing environments. Licensed plumbers, pipefitters, HVAC technicians, and maintenance professionals typically install this part.

This O-ring is used in applications where sealing against petroleum products, fuels, oils, and a wide spectrum of chemicals is required. Its fluoroelastomer construction supports vacuum service and provides low gas permeability, making it appropriate for both pressurized and vacuum fluid circuits. Typical installation scenarios include pump housings, valve bodies, manifold assemblies, and fluid-system fittings in residential, commercial, and light industrial settings. Operating temperature range spans from -15 degrees F to 400 degrees F, supporting year-round service in variable thermal environments.

Key Features

• Fluoroelastomer (Viton-type) material with broad chemical compatibility including petroleum products
• High temperature resistance rated to 400 degrees F with a low end of -15 degrees F
• Low compression set for long-term seal retention under sustained load
• Suitable for vacuum service with low gas permeability
• Round cross section, Dash 158 designation for standard groove sizing
• Hardness of 70 Shore A for firm, reliable seating in metal and machined plastic grooves

Compatibility

Compatible with petroleum products, fuels, and a wide spectrum of chemical media as noted in the product specifications. Designed as a standard Dash 158 O-ring replacement for use in any application calling for a 4.75 inches ID fluoroelastomer seal with a 0.094 inches cross section.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or HVAC technicians following applicable system codes. Always depressurize and isolate the fluid circuit before removing the old seal. Inspect the groove for burrs, scoring, or contamination before seating the new O-ring, and avoid twisting or stretching the ring during installation. Do not use lubricants that are incompatible with fluoroelastomer compounds.