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)



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

Delivery state

  • 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

Installation and operating instructions

Wilo-Protect-Module C

Article Number 2066436, 2066437
Edition 0206
Page format A5
Number of pages 20
PDF (1 MB)


Article Number 2132735, 2165760
Edition 1511
Page format A4
Number of pages 28
PDF (2 MB)


Article Number 2132735, 2165760
Edition 1511
Page format A4
Number of pages 28
PDF (2 MB)


Article Number 2165760
Edition 2020-08
Page format 148.2 x 209.9 mm
Number of pages 96
PDF (4 MB)

General overview (Documents)

General overview 2019 International version

Article Number 2200591
Edition 2018
Page format 209.9 x 297.0 mm
Number of pages 74
PDF (40 MB)

General overview 2021 International version

Article Number
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