Huge ball valves, worth to refurbish? Answered
I have now already two of these huge ball valves we have on a machine at work.
Soon I will have one or two more...
The replacements always cost well in excess of $500, just for the part, excluding labour.
If I am correct than even these big guys can be dismantled like their small cousins.
Screw the screwed side open, remove the turning mechanism and them push the actual valve out.
Please correct me if that might be different!
The actual problem with ours is that after a few years of 24/7 use they start to leak through - not out in anyway.
A visual inspection without taking them apart show build up on the ball part.
No scratch marks or other damages that I can see.
Where there is no build up it is shiny like a mirror.
The seal are blue and clearly show the same abuse as the ball.
I tried with some aluminium poking tool I made up and the debris is really hard and baked on onto these seal rings.
My assumption is that only the seals started to fail.
And as they are consumables I am starting to wonder if it is worth trying to find replacements and to clean up the valve after taking it apart.
With only a manufacturer (from the machine, not the valve) part number but no markings or anthing on the valve itself I struggle to find any online place to check for genuine rebuild kits :(
Any links for sites with lots of balls valves pictures (to be motorised) so I might one that looks identical?
Last but not least: How to unscrew the damn thing?? LOL
I tried in a vice with the largest set of plumbing pliers I could boorow but it won't budge at all.
Would need an about 48mm spanner to grab the "nut" part of the valve.
The pliers are almost a meter long but even swearing like the worst guy in town did not help to make anything move.
Before cutting a custom made spanner from some re-inforcing steel plates: Is there any proper way of unscrewing a big ball valve?