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Water supply pump

The term water supply pump refers to all centrifugal pumps which transport drinking or service water either directly to a supply network or through long-distance pipes to a supply area.

Requirements to be met by water supply pumps:

  • High efficiency (continuous operation)
  • Reliable bearing arrangement which does not impair the water quality
  • Low noise level

Various types of pumps are used depending on the flow rate (Q), head (H) and installation conditions.

Types of pumps and their operating ranges

  • Submersible borehole pumps are installed in wells. They pump the water directly to the network if no water treatment is required:
    Q up to 3,000 m3/h, H up to 1,400 m
  • Vertical, wet-installed deep-well turbine pumps (see Vertical pump; see Wet well installation):
    Q up to 2,800 m3/h, H up to 160 m
  • Vertical, wet-installed, multistage tubular casing pumps (see Mixed flow pump; see Multistage pump):
    Q 800 to 30,000 m3/h, H up to 140 m
  • Single-stage, single-entry volute casing pumps:
    Q up to 36,000 m3/h, H up to 140 m
  • Single-stage, single-entry volute casing pumps with diffuser: Q = 500 to 10,000 m3/h, H up to 210 m
  • Multistage pumps: Q = 20 to 500 m3/h, H up to 500 m; Q = 500 to 3,500 m3/h, H up to 350 m
  • Double-suction, single-stage volute casing pumps
    (see Double-suction pump):
    Q = 100 to 30,000 m3/h, H up to 500 m
  • Double-suction, single-stage volute casing pumps with diffuser:
    Q = 800 to 20,000 m3/h, H up to 700 m

Water supply pump