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Posted by HeatPro on March 21, 2008 at 11:45:42:
In Reply to: Re: American Radiator Co No, 2 posted by Rob Lund on March 21, 2008 at 10:39:33:
A large diaphragm is usually inside the saucer-shaped vessels (look at commercial-sized gas regulators outside of large buildings like motels and malls.)
Old solid-fuel boilers often had arms that operated off the diaphragm that had the air-shutter damper to the fire chamber; they might be lost over time. As the pressure rose in the system, the damper closed to reduce fire, keeping a steady burn.
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