Value Collection ZMSCV70351 Viton O-ring Dash 351

Product Description

The Value Collection ZMSCV70351 is a Dash 351 Viton fluoroelastomer O-ring designed for static and dynamic sealing applications across HVAC, plumbing, and industrial fluid systems. The round cross-section profile measures 4.75 inches inside diameter, 5.125 inches outside diameter, and 0.1875 inches thick, with a 70-durometer hardness rating. Rated for continuous service from -15 degrees F to 400 degrees F, this O-ring handles high-heat environments where standard nitrile or EPDM compounds fall short. It ships in a package of two rings.

This O-ring is suited for sealing connections in petroleum-based fluid systems, hydraulic circuits, vacuum service lines, and high-temperature process equipment. Its fluoroelastomer compound delivers low gas permeability, making it a sound choice for vacuum pump seals, refrigerant-adjacent fittings, and fuel-side connections in commercial HVAC and industrial service. Technicians working on large-bore fittings, valve stems, pump housings, and flanged connections will find the Dash 351 sizing a direct match for standard groove dimensions.

Key Features

• Fluoroelastomer (Viton) compound with broad chemical compatibility including petroleum products
• Rated -15 degrees F to 400 degrees F continuous working temperature
• 70-durometer hardness for firm compression set resistance in demanding sealing environments
• Low gas permeability and suitable for vacuum service applications
• Round cross-section with ANSI Dash 351 standard sizing for precise groove fit
• Package includes 2 O-rings per order unit

Compatibility

Designed as an OEM-style replacement or service seal for any application specifying an ANSI Dash 351 O-ring in a fluoroelastomer or Viton-compatible compound. Compatible with petroleum products and a wide spectrum of industrial fluids as noted by the manufacturer.

Installation Notes

Installation is performed by qualified HVAC technicians, plumbers, or industrial mechanics depending on the host system. Depressurize and de-energize the system completely before removing the existing seal. Lubricate the O-ring with a compatible fluid or grease before seating it in the groove to prevent tearing during assembly. Avoid overstretching the ring during installation, as fluoroelastomer compounds have lower elongation tolerance than softer rubber compounds.