unseizing a valve

[Paul205]

People,

I have one of these valces fitted under my bath:-

http://www.screwfix.com/p/22mm-full-bore-isolating-valve/43961

It has been in place for around 3 years and is seized. When I try to turn it with a screwdriver the valve turns around 1/8 turn and then won't turn any more except to the open position. Trying to turn it more than 1/8 turn results in the screwdriver jumping out of the slot.

I would appreciate guidance on how best to unseize it.

I have some light oil, WD40 and spraygrease around the house.

Cheers




Paul

 

[Burnerman]

You can try turning the thing in the opposite direction, but there's a reasonable chance of it leaking......you won't get a flood, but be prepared to replace it!
John

 

[Paul205]

what are your thoughts on leaving some lube on it for a week or two burnerman

 

[HERTS P&D]

Drain down and replace it.

Andy

 

[Burnerman]

These valves have a ball closing system, and yours is probably bunged up with lime scale .....the ball normally seats on a plastic seat (!) and WD or whatever has a bit of a job getting in.
My idea may work, but Andy has it sussed really.
John

 

[Agile]

If you rock it back and forward into the jammed position it MAY slowly move further and further.

I always tell people that all valves and stopcocks should be moved through their full travel every two months!

Nobody does it.

Tony

 

[Boilerman2]

No one (not even me) is going to dismantle a bath panel to move a valve every two months - not even a "quality one" like the OP's!