Double Check Vapor Equalizing Valves for ASME and DOT Containers 7573 Series and 3183AC

Designed to facilitate loading operations by providing equalization of pressures in the supply and storage containers. The supplementary excess flow valve closes when the flow from the container being filled exceeds a predetermined rate.

The 7573 Series is designed for use in bulk delivery systems and motor fuel containers. The 3183AC is designed for use in delivery trucks and other large containers.


    • Double check provides added system protection.
    • Upper back check valve can be easily replaced without evacuating the container
    • Specify RegO® Vapor Equalizing Valves on all your original tank purchases to insure quality and dependable performance.


Body Brass
Spring Stainless Steel
Upper Check Seat Disc Synthetic Rubber
Seals Synthetic Rubber
Cap Plastic