Value Collection ZMSCV70346 Viton O-ring Dash 346

Product Description

The VALUE COLLECTION ZMSCV70346 is a Dash 346 Viton fluoroelastomer O-ring designed for static and dynamic sealing applications in HVAC, plumbing, and industrial fluid systems. It measures 4.125 inches inside diameter, 4.5 inches outside diameter, and 0.1875 inches thick with a round cross section. The material is fluoroelastomer (Viton), rated at 70 Shore A hardness, which places it in the hard durometer range. The compound delivers reliable sealing from -15 degrees F to 400 degrees F, making it suitable for high-temperature service. Licensed tradespeople and maintenance technicians install this ring wherever a Dash 346 seal is required.

This O-ring is used in residential and commercial applications involving petroleum-based fluids, hydraulic systems, fuel lines, HVAC refrigerant-adjacent components, and vacuum service. The fluoroelastomer compound resists degradation from petroleum products and handles elevated operating temperatures that would compromise standard Buna-N rings. It is commonly specified in pump housings, valve bodies, flange connections, and compressor assemblies where chemical compatibility and low gas permeability are required. Each package contains 2 rings.

Key Features

• Fluoroelastomer (Viton) compound with good resistance to petroleum products and wide chemical compatibility
• Operating temperature range of -15 degrees F to 400 degrees F suits high-heat applications
• 70 Shore A hardness (hard rating) provides low compression set under sustained load
• Round cross section with 0.1875 inch thickness conforms to standard Dash 346 groove dimensions
• Low gas permeability makes this ring suitable for vacuum service
• Black color for standard visual identification of fluoroelastomer material

Compatibility

Designed as a standard Dash 346 O-ring replacement for any groove machined to the Dash 346 AS568 standard, including pump housings, valve bodies, flange connections, and other assemblies that require a 4.125-inch ID fluoroelastomer seal compatible with petroleum products.

Installation Notes

Power down or depressurize the system fully before removing the existing seal. Clean the groove thoroughly and inspect for wear or corrosion before installing the new ring. Apply a compatible lubricant to the O-ring during installation to prevent twisting or tearing. Follow applicable system manufacturer guidelines and relevant codes for pressure and fluid containment systems.