Hot Water Circulation Pump, TOP-S, -10 To 110 Deg Celcius

Be the First to Review

Special features/product 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


Glandless circulation pump with screwed connection or flange connection.


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

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)

Type key

Example: TOP‐S 40/10
TOP-S Standard pump (screw-end pump or flange-end pump)
40/ Nominal connection diameter
10 Nominal delivery head [m] at Q = 0 m3/ h


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


  • 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


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

Scope of delivery

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


  • Version for special voltages on request.


  • Screwed connections for threaded connection
  • Counter flanges for flange connection
  • Adapter fittings
  • Wilo-SK 602N/SK 622N tripping unit for full motor protection
  • For pumps 3~400 V:
    • Switching plug 3~230 V, 50 Hz (not TOP-S 80/15, TOP-S 80/20)