Replacing Butterfly valves - live

Why drain a system to replace a Butterfly valve? Why lose the delivery from the system during the replacement of the valve? Drop the traditional preparation of the processing system and go directly to the essentials - replace the valve. The very core of the application of the AOGV is to replace the Butterfly valve with minimal disturbance on the system delivery. Keep the system up and running - thoughts on a Friday.

The AOGV technology has been around since 2017. It has been developed to a functional design and performance with consistent delivery. The AOGV Gen2 for Butterfly valves is earning experience from over 100 site operations with AOGV and the improvements are considerable. The two versions of the AOGV are converging to the same practical setups. We have compensated for the weight of the bigger Butterfly valves and have included the different geometries of the various Butterfly constructions. A couple of AOGV units have been commissioned for firewater systems in the North Sea and cooling water systems in Australia. With the upgrade, we will promote the Butterfly version a lot wider and the market feedback is really interesting. "Is this really possible?" ... and yes it is!

So how does the AOGV for Butterfly valves work and what are the highlights of Gen2?

In Gen2 we attach a carriage around the Butterfly valve. The carriage becomes an interface between the valve body and the AOGV. The shapes and forms of the Butterfly valve vary quite a lot from manufacturer to manufacturer, inside the specifications for dimension and class and the adapter to the actuator. The system handles both the two different actuator interfaces. The weight of the valves is compensated with a lifting mechanism which during the flange separation actually lifts the valve clear of the flanges and floats the valves out and back in again between the flanges, preserving the sealing surfaces on the valves as well as on the flanges. The carriage is lifting from the flange plane outside the flange's raised face.

The complete valve replacement operation is performed inside the AOGV enclosure on live class 150 systems. Safe, smart, and any time you decide - no shutdown dependency.

Steel lines, GRE lines, exiting materials can be fixed.

The prototype AOGV has replaced some 10 Butterfly valves on the tank top of a tanker converted to an FPSO. We are looking into cases where we will replace valves below the waterline, valves in firewater lines, cooling water lines, and other applications. The fleet is growing.

The illustrations are mainly taken from an animation film which will be available on YouTube and our home page from January 2023. The animation will make the AOGV operation of replacing Butterfly valves in live systems simple and clear.

You do find more information on www.AOGV.com.