Armstrong Fluid Technology

Model Series 4312 - Twin Vertical In-Line Pumps

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Pipe-mounted 2-pump unit with integrated intelligent controls for space-saving installation, superior energy performance, and full redundancy during operation. Saves up to 75% in energy over comparable traditional constant speed or variable frequency operated pump installations.

  • Applications :
    • HVAC-system pumping; general purpose pumping; industrial/process pumping (water or glycol based)
    • Armstrong Design Envelope Pumps with integrated controllers are OSHPD pre-approved!
  • Materials:
    • Cast or ductile iron casing
    • Cast iron or bronze impeller
    • Sintered silicon carbide mechanical seal
  • Configuration : On-board Intelligent Variable Speed controls with Sensorless control. Controls enclosure UL type 12 or UL type 4X (outdoor applications). High-efficiency NEMA premium motors available. Inside single-spring mechanical seals.
  • Performance range : Up to 1250 USgpm (80 L/s) flow and 250 ft (75 m) head
  • Temperature : 250oF (121oC)
  • Power Range : 1 hp to 40 hp (0.75 kW to 30 kW)
  • Size : 2' to 6” (50 mm to 150 mm)

  • Vertical In-line design eliminates the need for inertia bases, housekeeping pads, and flex connectors and reduces piping requirement
  • 2-pump casing for reduced footprint
  • Integrated intelligent controls eliminate procurement, installation (incl. wiring), calibration and upkeep of differential pressure sensors
  • Superior energy performance qualifies for significant cost recovery under utility and government rebate programs

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