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Pumping Systems and Day Tanks

Pumping Systems and Day Tanks . Presented By Ken Still, CB Kramer. Agenda. Introduction Basic System Generator Pump Selection Boiler Pump Selection Pump Types and Limits Day Tanks Day Tank Accessories Pump and Day Tank Control Conclusion. Introduction. Ken Still – CB Kramer

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Pumping Systems and Day Tanks

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  1. Pumping Systems andDay Tanks Presented By Ken Still, CB Kramer

  2. Agenda • Introduction • Basic System • Generator Pump Selection • Boiler Pump Selection • Pump Types and Limits • Day Tanks • Day Tank Accessories • Pump and Day Tank Control • Conclusion

  3. Introduction • Ken Still – CB Kramer • Pump sets and day tanks typically operate as a single system with a common controller.

  4. Basic System Monitoring and Control

  5. Generator Pump Selection • 7 gph per 100KW = GPH • GPH x # gensets = GPH Total • GPH total x 4 = transfer pump size

  6. Boiler Pump Selection • 30gph per 100 BHP = GPH • GPH x # boilers = GPH total • GPH total x 2.5 – 3 to accommodate boiler mounted pump total flow • Typical boiler system selection

  7. Typical System w Boiler Pumps • Boiler Mounted pump limitations • Tight pump suction limits; 15”hg – 3psi • Boiler pump single point of failure • Boiler pumps requires 2.5-3 times flow rate (sometimes 10-15x more) from transfer pump

  8. Typical System w Boiler Pumps

  9. Alternative Boiler System 80 - 90

  10. Pump Types • Match the pump to the application • Suction or pressure type SUCTION PUMP SET PRESSURE (submersible) PUMPS

  11. Pump Sets • Submersible Pumps • Pro • Submerged suction • Simple single tank systems • Simple installation • Con • Pressurized in-ground piping • Limited sizes • Difficult maintenance • Unmanned spaces • Piping Monitoring • Complicated multi-tank redundant systems

  12. Pressure Pump System • Redundancy • Each tank must have redundant pumps

  13. Pump Sets • Suction Pumps • Pro • Buried piping under suction • Ease of maintenance • Simpler multi tank systems • Simple installation • Con • Limited suction ability • Additional floor space

  14. Suction Pump System • Redundancy • A single duplex pump set satisfies redundancy requirement

  15. Suction Pump Set Options • High Pressure 100psi • Low Pressure <50 psi mechanical pump set pump set with motor starter panel Pump set with motor starter and logic control panels

  16. Suction Pump Set Contruction Control panel(s) Relief valves Flow switch Priming funnel Suction strainer(s) Gauges Pump/motor sets Reservoir base w/leak switch

  17. Basic System Monitoring and Control Day Tanks

  18. Day Tanks • Built and certified to UL142 • Pressure tested to 5 psi • Almost always used on generators • Stand Alone • Belly Tank • Sometimes used on boilers

  19. Day Tanks • Stand Alone • Generator Belly Tank

  20. Belly Tanks • Completely isolate tank from generator Flexible fuel hose Spring isolation

  21. Independent Day Tanks • Double Wall • Return Pump Option

  22. Independent Day Tanks • Single Wall • Single Wall w/Tub Type Rupture Basin • Available w/o rupture basin

  23. Day Tank Accessories • Automatic fill manifold • Multi-tank applications • Sized to precisely match required flow

  24. Day Tank Accessories • Return Pumps • Manipulate tank level to test controls • Refresh fuel if it overheats • Empty day tank in emergency

  25. Day Tank Accessories • Accessories • Vent Caps • Level Indication • Level Monitoring • Others

  26. Day Tank Sizing • No rules or regulations requiring minimum sizes. • Some regulations limiting maximum sizes • IFC limit to 660 gallons in certain installations • Generator KW x .07 x hours desired = tank size • Often space dependent

  27. Day Tank Construction • Fittings in top of tank (except drain) • Easy access to all fittings • Drop tubes on all supply and returns • Keep the inflow away from generator suction

  28. Pump and Day Tank Controls • Primary functions • Monitor day tank level • Start/stop pumps • Open/close fill manifolds • Secondary functions • Leak detection • Communications and alarms • Auxiliary controls

  29. Pump and Day Tank Controls Low voltage logic control not to exceed 49 volts • Safe Design • High voltage separate from low voltage • Easy serviceability and compliance to NFPA and OSHAE standards High voltage motor control panel

  30. Pump and Day Tank Controls • NFPA 70e

  31. Conclusion • Basic System • Generator Pump Selection • Boiler Pump Selection • Pump Types and Limits • Day Tanks • Day Tank Accessories • Pump and Day Tank Control

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