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What is the recommended sizing for a condensate control valve in a steam heater control system?
The condensate control valve must not be oversized! It should typically be sized handle the maximum, normal, and the minimum duty of the exchanger. Typically, this translates into the control valve operating being between 60 -80 % open at maximum load and not less than 20 % open at minimum load.
See the user manual Compabloc IOM Manual.pdf for more details.