Value Collection ZMSCV70251 Viton O-ring Dash 251 5-pack

Product Description

The VALUE COLLECTION ZMSCV70251 is a Dash 251 Viton fluoroelastomer O-ring designed for static and dynamic sealing applications where chemical resistance and high-temperature performance are required. The ring measures 5.125 inches inside diameter, 5.375 inches outside diameter, and 0.125 inches thick with a round cross section. Rated for continuous service from -15 degrees F to 400 degrees F, this O-ring maintains a hard 70-durometer rating and delivers low compression set, making it a dependable choice for fluid sealing in demanding environments. Each package contains 5 rings.

This O-ring is suited for use in HVAC, plumbing, hydraulic, and industrial fluid systems where petroleum-based media, fuels, oils, or high-temperature fluids are present. Its fluoroelastomer compound provides wide-spectrum chemical compatibility and low gas permeability, making it appropriate for vacuum service applications as well. Technicians working on refrigeration compressors, pump flanges, valve bodies, and similar assemblies commonly specify Dash 251 rings at this diameter. The black color and round cross section are consistent with standard AN/SAE O-ring groove specifications.

Key Features

• Fluoroelastomer (Viton) compound with good resistance to petroleum products and fuels
• Operating temperature range of -15 degrees F to 400 degrees F
• Hard 70-durometer rating with low compression set for long-term sealing integrity
• Round cross section suits standard O-ring groove dimensions per Dash 251 specification
• Low gas permeability makes it suitable for vacuum service applications
• Packaged in quantities of 5 rings per order

Compatibility

Designed as an OEM-style replacement or maintenance stock O-ring for any application calling for a Dash 251 fluoroelastomer seal with 5.125 inches inside diameter and 0.125 inches cross section thickness. Compatible with petroleum products and a wide spectrum of chemical media as noted by the manufacturer.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or industrial mechanics. Always de-energize the system, depressurize, and purge any fluid before replacing O-ring seals. Lightly lubricate the O-ring with a compatible grease or fluid prior to installation to prevent tearing during assembly. Inspect the groove for burrs, scoring, or contamination before seating the new ring.