WRAS Paints For Valves

[Brad93]

I guess they/you aren't looking for alternative suggestions but hey ho -

Unless it needs to be purely mechanical because it's miles from an electric supply, or the level must be maintained precisely, a float switch and appropriately sized motorised valve may be cheaper to buy and maintain and potentially more reliable too.

I would agree!

 

[Brad93]

belzona 1341 supermetal glide is what one of our contractors use
its needs to be spotlessly clean and a shot blasted finish is ideal

not cheap though

There is a uk based company called resimac that make an identical copy, not expensive really. Yes needs to be super clean and shot blasted for best adhesion.

 

[Jelly_Sheffield]

I guess they/you aren't looking for alternative suggestions but hey ho -

Unless it needs to be purely mechanical because it's miles from an electric supply, or the level must be maintained precisely, a float switch and appropriately sized motorised valve may be cheaper to buy and maintain and potentially more reliable too.

It depends on the consequences of a control failure.

If there's any likelihood of causing flooding to property, taking on the liability of designing a robust system that won't allow that to happen should be worth a decent amount of money in and of itself.

And as...

Apparently they are heating engineers

And those valves are clearly intended to connect to a fairly significant water main...

There's a reasonable chance they've already strayed well outside of their comfort zone, and would end up subbing out any modifications as well.

Not all heating engineers are equal when it comes to large systems like these.

Some years ago I got a phonecall in the middle of the night, to organise sending an industrial cleaning team and vacuum tanker to a tower block in central London to deal with the aftermath of a firm of "heating engineers" attempting to drain a system which had a circulating volume of about 60m³ of water, in the same manner as you would a domestic system.

 

[Brad93]

Exterior body of the valve is cleaning up okay. Need to knock some of the internal rust, dust and limescale out with a wire wheel first.