Steam Condensate Lift, What is the max lift for Condensate .

ttekushan_3

about 2' per lb pressure for each foot of lift plus another pound for the check, and be sure to add the pressure required for the heater, oh, about 2 lbs, so at your 3' lift I'd say about 5 lbs at the unit heater inlet should get it working.

Now you have to figure the pressure drop from the boiler to the unit heater based on pipe size and the other loads applied to it. Then add that to your 5 lbs and thats where the boiler pressure is going to need to be.

As Dan points out on p. 159 of "The Lost Art of Steam Heating" sometimes you have to "crank it up!"

-Terry

Ralph Giordano

Condensate Lift

Is there a formula for Steam Condensate Lift in a wet return on a two pipe system? System has 2 Unit Heaters that have a 2 foot and 3 foot lift to the wet return line.Both unit heater returns have a check and F&T trap.The Unit Heaters stay cool with a call for heat from local T- Stat to a 2 way control valve.