2000 Hook-up Book

a HOOK-UP DIAGRAMS Figure II-25 Complete Condensate Drainage from Air Heater Coil under “Stall” with Combination Pump/Trap in a Closed Loop System When the steam pressure within the coil is high enough to push conden sate through the steam trap, against any back pressure from a lift to high er level or into a pressurized line, the pump is inoperative. If the action of the temperature control lowers the coil pressure sufficiently, the conden sate flow stalls. Water backing up into the PPP body brings it into operation and the pump uses motive steam to push the condensate through the trap to the return line. At the end of each discharge stroke, the motive steam in the pump body is exhausted through a balance line to the top of the liquid reservoir. A ther mostatic air vent on the balance line vents air under startup conditions, even if the pump/trap is fully flooded with condensate at this time. Float & Thermostatic Steam Trap Direct or Pilot Operated Temperature Control Strainer Steam Supply Motive Steam Supply Pressure Powered Pump Moisture Separator Thermo Dynamic Steam Trap Reservoir Condensate Return Heated Air Outlet Temperature Control Sensor Thermostatic Air Vent Air Inlet Check Valve Float & Thermostatic Steam Trap Strainer Spira-tec Loss Detector Strainer Coil Drain to Safe Place See Fig. II-25A for the preassembled Process Condensate Removal Module Steam Trap Station

Figure II-25A Process Condensate Removal Module A preassembled modular pumping system provides a sole source solution for air heater coil applications.

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