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Posted by HeatPro on May 19, 2006 at 17:13:21:
In Reply to: Re: Gas Steam Boiler posted by joe on May 19, 2006 at 16:37:18:
: I came across a hot water radiator today with a "Danfloss" valve at the supply. It looked like a balancing valve and it had a label marked "made in Denmark".
+++ It is most likely a non-electric radiator valve that works by the air around it heating a metal/wax inside the cartridge. By turning the valve body, you can regulate the heat in the room without a thermostat. I've used Danfoss valves to heat my home for the past 20 years that way. Nothing to touch - set it and forget it.
http://www.danfoss-randall.co.uk/default.asp
A Taco balancing valve is easier to set. Put a thermometer on both lines and set for a 20F difference. Ball valves and unions at the radiator make it easy to repair/cleanup/paint later.