172-65606A-02 (JAH5RA-R/JAH7RA-R) 12 Jan 2021
7
The Need for a Pressure-balancing Line
This drain trap is designed to automatically discharge inflowing condensate.
However, if the condensate completely fills the inlet path of the trap, air or gas in the
trap body will not be able to escape, preventing displacement by condensate, and
thus preventing condensate from entering the trap. This phenomena is called air
binding. Air binding occurs more often in piping with long horizontal lengths, smaller
diameters or multiple bends. To prevent air binding and ensure air or gas can be
displaced by incoming condensate, a pressure-balancing line should be installed
between the trap cover and the dry portion of the receiver tank.
Connect the pressure-balancing line in the following manner:
Receiver Tank
Air/Gas Main
Pressure-balancing
Line
