Value Collection ZMSCV70339 Viton O-ring Dash 339 5-pack

Product Description

The VALUE COLLECTION ZMSCV70339 is a Viton (fluoroelastomer) O-ring with a round cross section, sized to Dash 339 standards. It measures 3.25 inches inside diameter, 3.625 inches outside diameter, and 0.1875 inches thick. The fluoroelastomer compound provides high resistance to petroleum products, low compression set, and strong performance at elevated temperatures up to 400 degrees F. It is rated Shore A 70 hardness and is suitable for vacuum service applications with low gas permeability. Licensed plumbers, HVAC technicians, and industrial maintenance professionals install this seal in fluid handling systems where petroleum-based media and high temperatures are routine service conditions.

This O-ring is used in residential and commercial applications where a reliable static or dynamic seal is needed against petroleum products, hydraulic fluids, and similar media. Its wide chemical compatibility and operating range from -15 degrees F to 400 degrees F make it a common choice in HVAC compressor assemblies, plumbing valve seats, pump housings, and industrial fluid systems. Each package contains 5 O-rings, making it practical for service calls requiring immediate replacement inventory. The Dash 339 designation allows direct cross-reference to standard O-ring sizing charts used across trade industries.

Key Features

• Fluoroelastomer (Viton) material resists petroleum products, hydraulic fluids, and a wide spectrum of chemicals
• Operating temperature range of -15 degrees F to 400 degrees F suits high-heat service environments
• Low compression set maintains seal integrity under sustained clamping load
• Suitable for vacuum service with low gas permeability
• Shore A 70 hardness rating provides a balance of flexibility and seal durability
• Round cross section for consistent seating in standard O-ring grooves

Compatibility

Designed as a standard Dash 339 O-ring replacement for any application requiring a 3.25-inch ID fluoroelastomer seal compatible with petroleum products and high-temperature service conditions.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or industrial maintenance mechanics. Shut off all fluid supply and relieve system pressure before removing the old O-ring or opening any fitting. Inspect the O-ring groove for damage, debris, and proper dimensions before seating the new ring. Avoid using petroleum-based lubricants unless confirmed compatible with the sealed media; use an appropriate O-ring lubricant rated for fluoroelastomer compounds.