Steam Condensate Pumping

Specification Checklist for Steam Condensate Units

• Pump flow rate
  Typically 2 times the normal (not peak) condensate flow rate.


• Total Dynamic Head (max.)
  Calculated when pumps are operating at the actual pump flow rate (which may be a bit higher than specified flow rate) and with worst case back pressure condition. Consider all other sources of condensate that may flow into condensate header.


• TDH (Min)
  Specify so that in worst case the NPSHR (+3 ft. for centrifugal pumps) is still less than the NPSHA. Look at minimum back pressure in discharge line and highest liquid level on suction side.


• Temperature
  Worst case, considering distance of condensate receiver from condensing source, and likelihood of steam trap failure.


• Inlet height for condensate
  Specify the minimum for which the receiver must be designed.


• Receiver size
  Consider one or two sizes larger. Allows for increase in capacity without insulation and piping changes.


• Plot area
  What is maximum allowable?


• Controls
  Specify NEMA designation. Does not necessarily have to be similar to motor designation.
  
  
• Pump materials of construction
  What chemicals may be used in boiler treatment and condensate treatment system. Amines and sulfites are of particular importance. What about future?


• Mechanical seals / Packing
  High performance seals used above 212F. Packing used where seal failure may cause problem.


• Pump speed
  1750 RPM is desirable. Seal and bearing life much better than at 3500 RPM.
  
  
• Pump type
  Regenerative turbine pump: non-cavitating, stable flow rate

See other pump products.