Wilo-TOP-SD | 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
  • Twin-head pump for main/standby or parallel operation
  • Pump housing with cataphoretic (KTL) coating protects against corrosion due to condensation formation
Series description


Glandless twin-head circulator with flange connection (TOP-SD 30/5 with screwed 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

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
  • Rotation monitoring lamp (standard equipment for 3~pumps only)
  • 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 32 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 pumps DN 80: PN 6 flange (designed for PN 16 according to EN 1092-2) for PN 6 counter flange
  • Mounting bracket set-up (with horizontal shaft only):
    • Standard version for pumps TOP-SD 40/15, 50/15, all TOP-SD 65 and TOP-SD 80.
    • Special version for pumps TOP-SD 32/10, 40/3, 40/7, 40/10, 50/7, 50/10. M10 drilled hole for mounting bracket set-up available on request.
  • Double switchover valve in pump housing
  • Cable inlet possible from both sides (only for 1~pumps and 3~pumps with P2 ≥ 180 W)

Scope of delivery

  • Twin-head pump
  • Including gaskets for screwed connection (only for TOP-SD 30/5)
  • Including washers for flange screws (for nominal connection diameters DN 32 - DN 65)
  • Installation and operating instructions

Type key


Wilo-TOP‐SD 40/7


Standard twin-head pump (flange-end pump, TOP‐SD 30/5 with threaded connection)


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-SD 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 1¼ to DN 80
  • 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)

Certification booklet

Stratos, Stratos-D, Stratos-Z, Stratos-ZD, Stratos MAXO, Stratos MAXO-D, Stratos MAXO-Z, Stratos PARA, Stratos PARA-Z,Yonos MAXO, Yonos MAXO-Z, Yonos ECO BMS, Yonos PARA HF, TOP-S, TOP-Z, TOP-SD, TOP-RL, TOP-I

Page format 209.9 x 297.0 mm
Number of pages 40
PDF (6 MB)

Certificate REACH (Documents)

REACH regulation

Edition 2020-08
Page format 209.9 x 297.0 mm
Number of pages 2
PDF (158 KB)
Product list
Number of results: 30
Product descriptionPump connectionPort-to-port length L0Maximum operating pressure PNMains connectionGross weight, approx. mPieces per palletArticle number