Value Collection ZMSCV70343 Viton O-ring Dash 343 2 Pack

Product Description

The VALUE COLLECTION ZMSCV70343 is a Dash 343 Viton (fluoroelastomer) O-ring designed for static and dynamic sealing applications where exposure to petroleum products, high temperatures, or aggressive chemicals is a concern. Measuring 3.75 inches inside diameter, 4.125 inches outside diameter, and 0.1875 inches thick, this round cross-section ring carries a 70 Shore A hardness rating. It is rated for service from -15 degrees F to 400 degrees F, making it a reliable choice in demanding fluid and gas sealing environments. Each package contains 2 rings.

This O-ring is suited for plumbing, hydraulic, pneumatic, and fuel-system sealing applications in both residential and light commercial settings. Its fluoroelastomer compound provides good resistance to petroleum-based fluids, making it a practical choice for fuel lines, pump housings, valve bodies, and similar assemblies. Technicians in HVAC, plumbing, and industrial maintenance regularly specify Viton rings in applications where nitrile or EPDM compounds fall short due to temperature extremes or chemical exposure. The Dash 343 designation allows straightforward cross-referencing to standard O-ring size charts.

Key Features

• Fluoroelastomer (Viton) compound rated from -15 degrees F to 400 degrees F
• 70 Shore A hardness for a firm seal with low compression set
• Good resistance to petroleum products and a wide spectrum of chemicals
• Suitable for vacuum service with low gas permeability
• Round cross-section, Dash 343 standard sizing for easy replacement cross-referencing
• Sold in a 2-piece package per order unit

Compatibility

Designed as a standard Dash 343 O-ring replacement compatible with assemblies requiring a fluoroelastomer seal rated for petroleum products, high temperatures, and chemical exposure. Compatible materials include petroleum-based fluids and products as specified by the manufacturer.

Installation Notes

O-ring installation should be performed by a qualified plumber, HVAC technician, or mechanical technician. Always depressurize and de-energize the system before removing or replacing any sealing components. Inspect the groove and mating surfaces for damage or contamination before seating the new ring, and apply a compatible lubricant to reduce the risk of cutting or rolling the ring during assembly. Avoid using petroleum-based lubricants unless confirmed compatible with fluoroelastomer compounds.