In an earlier contribution to this discussion,
Andy Pandy wrote:


The spindle moves freely with finger & thumb. Only moves 45 deg or so
(normal i presume)

Did it move straight away, or did you have to free it?

I think some of these valves move 45 degrees either side of the mid
position - i.e. 90 degrees in all. Is that what you mean?

--
Cheers,
Set Square
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