radiator valves

A wheel head enables opening/closing the valve, a lock shield prevents opening/closing.

"Jo King" wrote in news:dim86s$s0d$ snipped-for-privacy@news8.svr.pol.co.uk:

Nothing at all, physically; the lockshield has a cover, not a knob, as it's not an operational control, but is set by the Guild approved wizard in the commissioning rite called balancing, and it must nevermore be touched by unconsecrated hands.

The wheel valve changes the rad from ARF mode to ARN condition and vice versa, and is fitted with a knob to enable muppets to do this without danger

mike

Nothing. The metal part of the valve is identical. Valves are often supplied with 2 plastic tops - one which has a square hole in it for rotating the shaft of the valve - and one which is just a tamper-proof cover, so that the valve becomes a lockshield when this is fitted. The lockshield valve is adjusted during system balancing - and then left in its partially open state thereafter. The other valve is used to turn the rad on and off, as required.

On that topic, has anyone else noticed that a number of lockshields these days come with covers that are very loose fitting? I have about three new ones where the lockshield cover only really rests in place - there is no real positive "click" as it goes into position.

John Rumm wrote in news:434f06c4$0$49800$ snipped-for-privacy@ptn-nntp-reader04.plus.net:

Admittedly I've only been at it for 5 yrs or so, but I've never met any other sort

mike

mike ring wrote in news:Xns96EFC61D9D0BBmikeringbtinternetco@130.133.1.4:

......than the dead loose ones :-0

mike

I can remember lockshields where the covers were secured with a screw!