Girard Equipment may be best known as a manufacturer of their popular line of Pressure Relief Vents and Magnetic Vacuum Breakers. The tank trailer industry is in constant motion. Providing solutions to emerging changes within the industry is Girard's specialty.

It's hard to concentrate on the road ahead when you are worrying about what pressure relief device you have behind you. Girard has revolutionised the way corrosives are hauled and their patented Pressure Relief Vent, with an integral Teflon liner, protects the relief vent's vital components from chemical attack.

Pressure Relief Vents

Our 3″ DOT 407 Vents allow you to upgrade virtually any MC 307 or MC 312 tank to DOT 407 or DOT 412 venting. All the benefits of the 400 Series Vents without expensive hot-work. Flow rates are slightly less than our standard DOT 407 Vents, but are more than sufficient for most tanks. The stainless steel valve seat seals on a Teflon® encapsulated silicone “O” Ring. This “O” Ring provides complete chemical resistance and a bubble-tight seal to meet the latest DOT requirements.

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Magnetic Vacuum Breakers

The DOT 407 Magnetic Vacuum Breaker is a valve designed to limit negative pressure (vacuum) in a typical tank trailer. A permanent magnetic force controls the movement of the valve poppet to open on demand of 4" Hg or greater. All working parts are kept away from the airflow paths, which promotes easy cleaning and hassle-free repairs.

The Girard Equipment 3" Magnetic Vacuum Breaker (MC 307) is a valve designed to prevent negative pressure (vacuum) from developing and imploding a typical tank transport.

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Do you want more information on the available Girard products? Click on the icon to go the contact form, fill it in and we will get back to you with the required information.

Bottom Valve Outlets

A butterfly & foot valves are quarter-turn valves used to regulate flow. A metal disc in the body of the valve is positioned perpendicular to the flow in the closed position, and rotated one quarter of a turn to be parallel to the flow in the fully opened position. Intermediate rotations allow regulation of liquid flow.