How To Size: WPN Series
The capacity charts show the maximum flow at factory setting.
Curve
Flow of Condensate at approx. 18 & 27 °F below boiling temperature.
Curve
Flow of Sub-Cooled Condensate at approx. 54°F below boiling temperature. (through back up of condensate)
Curve
Flow of Cold Condensate at about 68°F (during start-up of a cold system).
Cooler temperatures cause the seat in the controller to open wider; therefore, trap capacity will increase when colder condensate is in contact with the Bi-metal element. Trap capacity is given at different temperatures below saturated steam temperature.
WPN 40 Series
