Value Collection ZMSCV70349 Viton O-ring Dash 349

Product Description

The VALUE COLLECTION ZMSCV70349 is a Dash 349 Viton (fluoroelastomer) O-ring with a round cross section, designed for static and dynamic sealing in fluid and gas systems. It measures 4.5 inches inside diameter, 4.875 inches outside diameter, and 0.1875 inches thick, with a 70 Shore A durometer hardness rating. Rated for continuous service from -15 degrees F to 400 degrees F, this O-ring handles elevated temperatures and aggressive media that standard nitrile seals cannot. Plumbers, HVAC technicians, and mechanical service professionals install this type of seal in pumps, valves, flanges, and piping connections throughout residential and commercial systems.

This O-ring is suited for use in petroleum-based fluid systems, hydraulic circuits, vacuum service applications, and high-temperature sealing environments. The fluoroelastomer compound delivers low gas permeability, making it appropriate for pressurized gas and vacuum service where seal integrity is critical. It is commonly used in HVAC equipment, pool and spa plumbing, fuel handling components, and general industrial fluid systems that require wide chemical compatibility. Package quantity is 2 per order.

Key Features

• Fluoroelastomer (Viton) compound provides broad chemical compatibility with petroleum products, fuels, and hydraulic fluids
• Operating temperature range of -15 degrees F to 400 degrees F for high-heat service environments
• 70 Shore A durometer hardness rated Hard for reliable compression sealing
• Low compression set maintains long-term sealing force under sustained load
• Low gas permeability makes this O-ring suitable for vacuum and pressurized gas service
• Round cross section conforms to standard O-ring groove dimensions for Dash 349 hardware

Compatibility

Designed as a standard Dash 349 O-ring replacement for any groove or port dimensioned to accept a 4.5 inches ID by 4.875 inches OD by 0.1875 inches cross-section seal. Compatible with petroleum products and systems requiring fluoroelastomer chemical resistance.

Installation Notes

O-ring installation should be performed by a qualified technician following system manufacturer guidelines. Always depressurize and isolate the system before removing or installing sealing components. Inspect the mating groove and sealing surfaces for damage or contamination before installing a new O-ring. Apply a compatible lubricant to ease installation and prevent tearing of the elastomer during assembly.