In principle, the condensate systems should be designed descending. This, however, is not always possible, and the condensate has to be lifted after the condensate discharges. There is no problem with an ascending condensate line as such, provided there is sufficient pressure in the line to overcome the counter pressure caused by the static pressure as well as the pressure in the condensate system. Problematic situations are typically those where the primary pressure of the system drops if, for example, the control valve closes. In this case, the line remains under a water load that brings about water hammers.
To lift the condensate, GESTRA has developed several solutions, and the selection between them is based on the condensate volume as well as on the desired lifting height.
Models according to the site and the capacity
If the condensate volumes and the lifting height are relatively low, you can find excellent alternatives in a self-operated ED condensate lifter or in a new, compact condensate lifter combination UNA 25-PS that operates with auxiliary steam. You can also consider the steam trap/condensate lifter combination UNA 25-PK as an alternative. In this case, no separate steam trap is needed.
If the condensate volumes are higher, we recommend self-operated FPS and KH condensate lifters that operate with the auxiliary steam. The operation of the FPS condensate lifters is based on the float technology, and it is also compatible with EEX areas. KH’s operation, in turn, is based on the detector technology and its capacity is principally unlimited.