4700 Vertical Multi-Stage Pumps

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4700 Vertical Multi-Stage Pumps

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4700 vertical multistage pump
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4700 Vertical MultiStage (VMS) Pumps

  • Summary
  • Applications

    Domestic water pressure boosting; fire safety ‘jockey’ systems / system pressure upkeep; boiler feed water pumping

  • Description

    The Armstrong 4700 multi-stage pumps are designed for reliability and low maintenance cost

  • Materials

    Cast iron or stainless steel casing

  • Configuration

    Inside single-spring mechanical seal.

  • Performance Range

    Up to 25 L/s (400 USgpm) flow; up to 275 m (900 ft) head

  • Temperature

    250°F (121°C)

  • Power

    0.37 kW to 37 kW (0.5 hp to 50 hp)

  • Size

    38 mm to 100 mm (1.25" to 4") 

Low operating cost

  •  Armstrong 4700 pumps are equipped with high-efficiency NEMA-premium motors for significant reduction in energy consumption and cost 
  •  All motors are suitable for inverter-fed service

Design Envelope

Lowest installed cost. Lowest operating cost.


Minimal mechanical wear and low maintenance costs

  •  Anti-erosion measures in high-velocity areas of intermediate pump casing 
  •  Square-edge 6 and 12 spline shaft design for reduced impeller wear 
  •  Casing venting to prevent air entrapment and dry running 
  •  Tungsten carbide pump bearing and silicon carbide mechanical seal seat for extended durability 
  •  Flexible floating outer casing to compensate for differing temperature applications

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Vertical Multistage Pump Brochure

Vertical Multistage Pump Brochure (India)

Installation & Operating Instructions