This is what a metal gearbox on a butterfly valve looks like when it has been exposed to an aggressive environment, such as saltwater mist.
The metal gearbox corrodes when fitted in an aggressive environment, and this reduces the life of the valve.
It's probably something most people would rather avoid.
Our supplier, Sekisui, has therefore developed a new corrosion-resistant composite gearbox for their butterfly valve so that it doesn’t corrode.
This results in longer service life of the valve - and thus cheaper operation and less downtime for replacements.