Series description

Special features/product advantages

  • Reduced life cycle costs thanks to optimized efficiency
  • Bidirectional, force-flushed mechanical seal
  • Interchangeable casing wear rings
  • Permanently lubricated, generously dimensioned roller bearings
  • Low NPSH, best cavitation properties

Design type

Single-stage, low-pressure centrifugal pump with axial suction, mounted on a baseplate.


  • Pumping of heating water (acc. to VDI 2035), cold water and water/glycol mixtures without abrasive substances in heating, cold water and cooling systems.
  • Applications for irrigation, building services, general industry, power stations, etc.


Single-stage low-pressure centrifugal pump in monobloc design with coupling, coupling guard, motor and baseplate

  • Mechanical shaft seal or stuffing box

Scope of delivery

  • Pump
  • Installation and operating instructions
  • Pump with free shaft end or
  • Pump on baseplate with coupling and coupling guard or
  • Completely mounted pump on baseplate with electric motor

Type key


NLG 200/315-75/4


Series designation: Standard pump


Nominal diameter DN of pressure port


Nominal diameter of impeller [mm]


Rated motor power P2 [kW]


number of poles

Technical data

  • Permissible temperature range -20°C to +120°C
  • Mains connection 3~400 V, 50 Hz
  • Protection class: IP55
  • Nominal diameter DN 150 to DN 300
  • Max. operating pressure 16 bar


  • Pump housing and pressure lid: EN-GJS-500-7
  • Bearing bracket: EN-GJL-250
  • Impeller: EN-GJL-250 (special version: G-CuSn10)
  • Shaft: 1.4028
  • Stationary wear rings: G-CuSn10
  • Mechanical seal: AQ1EGG; (other mechanical seals on request)


  • Single-stage horizontal spiral housing pump with bearing bracket and exchangeable stationary wear rings in process design
  • Shaft seal using mechanical shaft seals in accordance with EN 12756 or packing stuffing box
  • Spiral housing with cast pump bases. Bearing of the pump shaft using greased grooved ball bearing
  • Shaft coupling with intermediate sleeve


General overview 2018 International version

Article Number 2200591
Edition 2018
Version number 1
Page format 209.9 x 297.0 mm
Number of pages 72

PDF (11 MB)



PDF: Wilo-CronoNorm-NLG


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