Series description

Special features/product advantages

  • Manual power adjustment with 3 speed stages
  • Pump housing with cataphoretic (KTL) coating protects against corrosion due to condensation formation

Design type

Glandless circulation pump with screwed connection or flange connection


Hot-water heating systems of all kinds, air-conditioning systems, closed cooling circuits, industrial circulation systems


Operating modes

  • Speed-stage switching

Manual functions

  • Setting of speed stages (3 speed stages)

Automatic functions

  • Full motor protection with integrated trip electronics (optional for all types with Wilo-Protect-Module C)

External control functions

  • "Overriding Off" control input (optional for all types with Wilo-Protect-Module C)

Signal and display functions

  • Individual/collective fault signal (potential-free NC contact) (optional for all types with Wilo-Protect-Module C)
  • Collective fault signal (potential-free NC contact) (optional for all types with Wilo-Protect-Module C)
  • Individual run signal (potential-free NO contact) (optional for all types with Wilo-Protect-Module C)
  • Fault signal light (optional for all types with Wilo-Protect-Module C)

Dual pump management (twin-head pump or 2 x single pump)

  • Main/standby mode (automatic fault-actuated switchover / time-dependent pump cycling) (optional for all types with Wilo-Protect-Module C)


  • With flange pump: Flange version
    • Standard version for pump DN 40: Combination flange PN 6/10 (flange PN 16 acc. to EN 1092-2) for counter flange PN 6 and PN 16,

Scope of delivery

  • Pump
  • Seals for threaded connection
  • Including washers for flange bolts (for nominal connection diameter DN 40)
  • Installation and operating instructions

Type key


Wilo-TOP‐RL 40/4


Standard pump (screw-end pump or flange-end pump)


Nominal connection diameter


Nominal delivery head [m] at Q = 0 m3 /h

Technical data

  • Permitted temperature range -20 °C to +130 °C, for short periods (2 h) to +140 °C
  • Mains connection 1~230 V, 50 Hz
  • Protection class IP X4D
  • Screwed connection or flange connection (depending on type) Rp 1. Rp 1¼ or DN 40
  • Max. operating pressure, standard version: 10 bar or 6/10 bar


  • Pump housing: Grey cast iron
  • Impeller: Plastic
  • Shaft: stainless steel
  • Bearing: Carbon, metal impregnated


REACH Regulation

Edition 2018-10
Page format 209.9 x 296.7 mm
Number of pages 4

PDF (581 kB)


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)





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