Wilo-TOP-S | Wilo
Your advantages

Your advantages

  • Direction of rotation signal lamp for displaying the correct sense of rotation (only with 3~)
  • Manual power adjustment with 3 speed stages
  • Pump housing with cataphoretic coating (KTL) protects against corrosion due to condensation formation
Series description


Glandless circulator with screwed connection or flange connection.


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


Operating modes

  • Speed-stage switching

Manual functions

  • Setting the speed stages: 3 speed stages (2 speed stages for 1~ pumps with P2 ≥ 350 W)

Automatic functions

  • Internal protection against non-approved high winding temperatures (only for pumps for which P2 ≤180 W)

Signal and display functions

  • Thermal winding contact (WSK, potential-free NC contact) only for pumps for which P2 ≥180 W) for full motor protection in all speed levels with optional tripping unit SK 602N/SK 622N
  • Direction of rotation control light (only for 3~pumps )
  • Display of selected speed stage

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

  • Main/standby operation or parallel operation (for automatic fault-actuated switchover/time-dependent pump cycling, a corresponding switchgear must be provided on-site)


  • For flange-end pumps: Flange versions
    • Standard version for DN 40 to DN 65 pumps: PN 6/10 combination flange (PN 16 flange according to EN 1092-2) for PN 6 and PN 16 counter flanges,
    • Standard version for DN 80/DN 100 pumps: PN 6 flange (designed for PN 16 according to EN 1092-2) for PN 6 counter flange
  • Cable inlet possible from both sides (only for 1~pumps and 3~pumps with P2≥180 W)
  • Thermal insulation as standard for heating applications

Scope of delivery

  • Pump
  • Thermal insulation
  • Including gaskets for threaded connection
  • Washers for flange screws (for nominal connection diameters DN 40 - DN 65)
  • Installation and operating instructions

Type key


TOP‐S 40/10


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 (TOP-S 25/13, 80/15, 80/20: -20 °C to +110 °C)
  • Mains connection:
    • 1~230 V, 50 Hz (depending on type)
    • 3~230 V, 50 Hz (with optional switching plug)
    • 3~400 V, 50 Hz
  • Protection class IP X4D
  • Screwed connection or flange connection (depending on type) Rp 1 to DN 100
  • Max. operating pressure of standard version: 6/10 bar or 6 bar (special version: 10 bar)


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

General overview (Documents)

General overview 2021 International version

Edition 2020
Page format 209.9 x 297.0 mm
Number of pages 74
PDF (10 MB)

Certificate REACH (Documents)

REACH regulation

Edition 2020-08
Page format 209.9 x 296.7 mm
Number of pages 4
PDF (1 MB)
Product list
Number of results: 48
Product descriptionMains connectionPump connectionNominal flange diameterGross weight, approx. mArticle number