Series description


  • End suction back pull-out, single stage, centerline discharge base mounted cenrifugal pump


  • Pumping clean or slightly contaminated water (max. 20 ppm) for circulation, transfer and pressure boosting purposes
  • Applications include municipal water supply, irrigation, building services (HVAC), general industry, power stations, etc.

Type key

 NL 4 x 3 x 8
NLEnd suction base mount type
4Suction (inlet) flange size (inch)
3Discharge (outlet) flange size (inch)
8Maximum impeller diameter (inch)

Special features/product advantages

  • Burgmann mechanical seal with conical sealing chamber
  • Pump shaft guard
  • 1/4" npt connections on bearing housing for vibration and temperature sensors
  • Maintenance free, non-regreasable, oversized ball bearings (2Z version)

Technical data

  • Power supply: 208-230/460/3/60 and 575/3/60 Volt
  • Fluid temperature range: -4 to 250 °F (-20 to +120 °C)
  • Operating pressure: 250 PSI (16 Bar)
  • Suction flange size range: 2 1/2" to 8", 150# ANSI type
  • Discharge flange size range: 1 1/2" to 6"
  • Fluid temperature range: -4 to 250 °F (-20 to +120 °C)
  • Maxium Head: 320'
  • Maxium flow: 2,900 USGPM
  • Max Hp: 200 Hp


  • Automatic pump control via WILO CC HVAC Controller


  • Cast iron volute, bronze impeller (bronze fitted) standard construction
  • Optional materials available (contact WILO for additional information)
  • Standard 150# ANSI flanged, 300# ANSI optional
  • Standard mechanical shaft seal AQ1EGG for water up to 250°F (120°C)
  • Optional gland packed for water up to 230°F (110°C)

Scope of delivery

  • Pump end only (bare shaft pump) or
  • Pump, base, coupling and coupling guard or
  • Completely assembly (pump, base, coupling, guard and motor)
  • Installation and operating instructions

PDF: Wilo-CronoNorm-NL


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