Duplex Single Phase Pressure Package

One of our current packages is unique in that it features two separate blower packages housed on a duplex base. This pressure system will be exported to South America to provide aeration in a water treatment application. Our customer wanted this unique configuration so the blower packages can be alternated, while saving space with a small footprint.

Each Package Contains

  • Roots 47 URAI Positive Displacement Rotary Blower
  • Motor, 15 HP, TEFC, Premium Efficiency, 1800 RPM, 1.15 SF, 230 Volts, 1 Phase 60 Hz
  • Motor Slide Base, Double Adjusting
  • Drive, V-Belt, minimum service factor of 1.4
  • Inlet Filter, 4″, Paper Element, Universal CCF-4
  • Inlet Silencer, 4″, Chamber-Absorptive Type, Universal SD-4
  • Discharge Silencer, 3″, Chamber-Absorptive Type, Universal SD-3
  • Discharge Flex Connector, 3″, Silicone Impregnated Fiberglass
  • Relief Valve, Pressure, Spring Type, Kunkle 337, 2″, Set at 6 PSI
  • Check Valve, 3″ MNPT, EPDM Seal
  • Pressure Gauge, 2.5″ Dia., 0-15 PSI, Liquid Filled, Snubber & Gauge Cock
  • Butterfly Valve, Wafer Style, 3″, Lever Actuated, Discharge Isolation

 

Common to both packages

  • Starter Panel for 208V/1/60 Hz
    • Logic to Alternate Usage of the two blower packages
    • UL489 Main Breaker
    • Overload
    • Contactor
    • 30 mm HOA Switch
    • 30 mm Red Light
    • 30 mm Greem Light
    • Hour Meter
    • Control Transformer
    • UL489 Control Breaker
  • Wiring from control panel to motor
  • Discharge manifold piping
  • Common Base

Operating Conditions (each blower):

  • Inlet Volume: 313 ACFM (284 SCFM)
  • Site Elevation: 10′
  • Barometric Pressure: 14.7 PSIA
  • Inlet Temperature: 92 °F
  • Inlet Pressure Drop: 0.3 PSI
  • Blower Inlet Pressure: 14.4 PSIA
  • Discharge Pressure Drop: 0.2 PSI
  • Discharge Pressure: 4.75 PSIG
  • Blower Differential Pressure: 5.25 PSI

Performance Data:

  • Design Speed 2443 RPM (68% of maximum)
  • Shaft Power: 9.8 BHP
  • Discharge Temperature: 162 °F
  • Differential Temperature: 70 °F (31 % of maximum)
  • Discharge Volume: 259 ACFM
  • Estimated Noise Level: 88 dBa at 3 feet