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water leg

bgriffsat
Member Posts: 2
I have a 2 pipe system returning to a boiler feed pump. The farthest steam main f&t trap has a water leg. The leg to get into the return line is approx. 20 inches higher than the f&t trap. Once into the return main it is gravity back to the bf receiver. The radiators on this farthest leg take a long time to heat up and the return cond line takes a long time just to get warm. I read in Dan's book that I need an air vent. He reccomends putting it on the second outlet port of the f&t trap. He talks about a Hoffman 75 being able to both vent the trapped air and break the vacuum when the steam condenses. When I go to the Hoffman site to look at this vent it says non vacuum. Am I missing something here and is the the right solution for my problem.
Thanks for your help
Thanks for your help
0
Comments
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It's confusing...
The Hoffman 75 is non-vacuum, but what that means is that it will not hold a vacuum -- that is when the system pressure drops it will let air in to break the vacuum. Which is exactly what you want.Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England0
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