Value Collection ZMSCV70345 Viton O-ring Dash 345

Product Description

The VALUE COLLECTION ZMSCV70345 is a Dash 345 Viton fluoroelastomer O-ring used to create a reliable seal in static and dynamic applications where exposure to petroleum products, high temperatures, or aggressive chemicals is a concern. The ring measures 4 inches inside diameter, 4.375 inches outside diameter, and 0.1875 inches thick with a round cross section. Shore hardness is 70, placing it in the hard durometer range. The temperature range runs from -15 degrees F to 400 degrees F, making it appropriate for demanding thermal environments. Plumbers, HVAC technicians, and industrial maintenance professionals use this O-ring wherever a Dash 345 fluoroelastomer seal is called out.

This O-ring fits sealing grooves requiring a Dash 345 ring with a 4-inch ID and round cross section. It performs well in systems handling petroleum-based fluids, hydraulic oils, fuels, and a wide spectrum of chemicals. The fluoroelastomer compound also supports vacuum service and exhibits low gas permeability, making it suitable for both pressure and vacuum line applications in residential and light commercial mechanical systems. Each package contains 2 rings.

Key Features

• Fluoroelastomer (Viton) compound delivers good resistance to petroleum products and fuels
• Low compression set helps maintain a reliable long-term seal under sustained load
• High temperature resistance rated to 400 degrees F continuous service
• Low gas permeability suits vacuum service applications
• Round cross section fits standard Dash 345 O-ring grooves
• Wide chemical compatibility spectrum reduces the need to stock multiple elastomer types

Compatibility

Designed as a direct replacement for any application specifying a Dash 345 O-ring with a 4-inch inside diameter, 4.375-inch outside diameter, and 0.1875-inch thickness in fluoroelastomer or Viton material. Confirm groove dimensions and fluid compatibility before installation.

Installation Notes

De-pressurize and drain the system completely before removing the old O-ring to prevent fluid release or injury. Inspect the groove and mating surfaces for nicks, corrosion, or debris that could compromise the seal. Apply a thin film of a compatible lubricant to seat the ring evenly without rolling or twisting it during installation. Follow all applicable codes and the equipment manufacturer guidelines for reassembly torque and system re-pressurization procedures.