Tri-Lobe Blower Pressure Packages for Aeration System

A new aeration system at a sewage treatment plant required three large blower pressure packages with on-site startup and training. Each package features a 728 Tri-RAM tri-lobe blower.

Package Equipment

  • Roots 728 Tri-RAM Positive Displacement Rotary Blower / Factory Certifed ASME PTC-9 One-PSI Slip Test
  • Elevated Fabricated Steel Base with Integral Belt Guard and associated brackets for accessory mounting
  • Motor, 200 HP, TEFC, Inverter Duty, 1800 RPM, 1.15 SF, 230/460 Volts, 3 Phase 60 Hz
  • Motor Slide Base, Double Adjusting
  • Drive, V-Belt, minimum service factor of 1.4
  • Inlet Filter, 12″, Polyester Element, Universal CCF-12
  • Inlet Silencer, 12″, Chamber-Absorptive Type, Universal SDY-12
  • Discharge Silencer, 10″, Chamber-Absorptive Type, Universal SDY-10, 12″ Discharge Flange
  • Discharge Expansion Joint, 10″, Single Arch, EPDM
  • Relief Valve, Pressure, Weighted Type, Sutorbilt, 4″, Set at 9 PSI
  • Check Valve, 10″ Wafer Style, EPDM Seal
  • Pressure Gauge, 2.5″ Dia., 0-15 PSI, Liquid Filled, Snubber & Gauge Cock
  • Filter Restriction Differential Pressure Gauge, 0-20″ WC, Dwyer 2020, Snubber & Gauge Cock
  • Vibration Isolation Pads, Rubber/Cork Type
  • Spare Parts: One Set of V-Belts per Blower, One Filter Element Per Blower, One Case of Oil Per Blower
One of the packages is lubricated prior to testing
Each blower package is driven by a 200HP motor
Each package features a 728 TRI-RAM blower
All three packages being loaded for shipment
The inlet silencers are detached and will be installed on site

Operating Conditions:

  • Inlet Volume: 3416 ACFM (3000 SCFM)
  • Site Elevation: 605′
  • Barometric Pressure: 14.4 PSIA
  • Inlet Temperature: 100 °F
  • Inlet Pressure Drop: 0.3 PSI
  • Blower Inlet Pressure: 14.1 PSIA
  • Discharge Pressure Drop: 0.2 PSI
  • Discharge Pressure: 8.0 PSIG
  • Blower Differential Pressure: 8.5 PSI

Performance Data:

  • Design Speed 2694 RPM (88% of maximum)
  • Shaft Power: 159 BHP
  • Discharge Temperature: 213 °F
  • Differential Temperature: 113 °F (49 % of maximum)
  • Discharge Volume: 2614 ACFM
  • Estimated Noise Level: 95 dBa at 3 feet
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