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Posted by Don on February 03, 2006 at 14:52:49:
In Reply to: Squirrels in the Check Valves posted by CharlesJ on December 29, 2005 at 15:22:39:
I agree with Tony's comments and the "overfilling" you are expierencing would be a sign that your checks are already worn. The "overfilling" is probably steam which has passed back through the check and condensed in the idle boiler(s). Try closing the stop valve when the boiler is idle, if it doesn't fill up you need new checks.
: We have recently installed a new boiler plant in our facility consisting of 4-10 hp Bryan water-tube steam boilers which supply a hot water heating loop via a heat exchanger. Each is fitted with a stop gate valve and a check valve with the steam line connected to a main header. All the check valves emmit a constant chattering noise when their boilers are making steam. Is this an indication of a problem? We are also experiencing overfilling in a boiler if it's been idle for more then a couple of hours.