Value Collection ZMSCV70440 Viton O-ring Dash 440

Product Description

The VALUE COLLECTION ZMSCV70440 is a Viton fluoroelastomer O-ring used to create reliable static or dynamic seals in fluid and gas systems. With a 6.75-inch inside diameter, 7.25-inch outside diameter, and 0.25-inch cross-section thickness, this Dash 440 O-ring fits large-bore seal applications across HVAC, plumbing, hydraulic, and industrial equipment. The round cross-section geometry seats evenly in standard AN/MS O-ring grooves. Viton fluoroelastomer construction delivers high-temperature resistance up to 400 degrees F and low-temperature performance down to -15 degrees F, along with a hard durometer rating of 70 Shore A. Plumbers, HVAC technicians, and mechanical contractors install this part as a sealing component in equipment serviced with petroleum-based fluids.

This O-ring is suited for residential and commercial applications where petroleum product compatibility is required. It performs well in hydraulic systems, fuel-handling equipment, pumps, valves, and large-diameter pipe or vessel fittings. The Viton compound provides low compression set, which helps maintain a lasting seal under sustained clamping loads. Its low gas permeability makes it appropriate for vacuum service and pressurized gas applications as well. The round cross section is compatible with standard O-ring groove dimensions for the Dash 440 size designation.

Key Features

• Viton fluoroelastomer material with broad chemical compatibility including petroleum products
• Operating temperature range from -15 degrees F to 400 degrees F
• 70 Shore A hardness rating for a firm, low-compression-set seal
• Low gas permeability suitable for vacuum service and pressurized gas systems
• Round cross-section profile fits standard Dash 440 O-ring grooves
• Black color for straightforward identification during installation

Compatibility

Designed as an OEM-style replacement or service seal for large-bore applications requiring a Dash 440 Viton O-ring, including equipment that contacts petroleum products, hydraulic fluids, and gases.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or mechanical contractors. Always depressurize and de-energize the system before replacing any O-ring seal. Clean the groove thoroughly and inspect it for damage or corrosion before seating the new ring. A thin film of compatible lubricant may be applied to help the O-ring seat without twisting or pinching during assembly.