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Wilo-SiBoost Smart 1 Helix VE | Wilo
Your advantages
Wilo-SiBoost Smart 1 Helix VE 1004

Your advantages

  • Heavy-duty system with Helix VE series stainless-steel high-pressure multistage centrifugal pumps and air-cooled integrated frequency converter
  • High-efficiency pump hydraulics
  • Superproportionally large frequency converter control range from 25 Hz up to a maximum of 60 Hz (version dependent)
  • Integrated full motor protection via PTC

Series description
SiBoost Smart


High-efficiency connection-ready water-supply unit (non-self-priming) with one vertically arranged stainless steel high-pressure multi-stage centrifugal pump in glanded version of the Helix VE series.


  • Fully automatic water supply in inlet mode, either from the public water supply network or from a tank
  • Pumping of drinking water, process water, cooling water, fire water (apart from fire-fighting systems in accordance with DIN 14462 and with the approval of the local fire safety authorities) or other types of industrial water that do not attack the materials either chemically or mechanically and do not contain abrasive or long-fibre constituents.


  • 1 pump of the Helix VE 2 to Helix VE 52 series, with IE4-equivalent standard motor and infinitely variable auto control with integrated frequency converter
  • Base frame made of galvanised steel, with height-adjustable vibration absorbers for insulation against structure-borne noise
  • Parts that come in contact with the fluid are corrosion-resistant
  • Stainless steel 1.4301
  • Shut-off valve, pressure side
  • Non-return valve, pressure side
  • Diaphragm pressure vessel 8 l, PN16, pressure side
  • Pressure gauge, pressure side
  • Optional low-water cut-out switchgear and pressure gauge, suction side



Wilo-SiBoost-Smart 1Helix VE 1004

SiBoost Smart

Compact pressure boosting system with integrated speed control


Number of pumps

Helix VE

Pump series


Rated volume flow [m3/h] of the single pump


Number of single pump stages

Technical data

  • Mains connection 3~400 V ± 10%, 50 Hz; 3~380/440 V ±10 %, 60 Hz
  • Max. fluid temperature +50 °C (+70 °C optional)
  • Ambient temperature max. 40 °C
  • Operating pressure 16 bar (25 bar optional)
  • Inlet pressure 10 bar
  • Nominal connection diameters on discharge side R 1¼" - R 1½"
  • Nominal connection diameters on inlet side Rp 1¼" - Rp 2"
  • Speed range 1500-3770 rpm
  • Protection class: IP 54
  • Fuse protection on mains side A, AC 3 according to motor power and EVU regulations
  • Approved fluids (other fluids on request):Note on fluids: Approved fluids are generally waters which do not attack the materials used, neither chemically nor mechanically, and do not contain any abrasive or long-fibre constituents.
    • Drinking water and domestic hot water
    • Cooling water
    • Fire water


Helix VE 2 to Helix VE 16

  • Impellers, guide vanes, stage housing made of stainless steel 1.4307
  • Pump housing of stainless steel 1.4301
  • Shaft of stainless steel 1.4057
  • 1.4404 shaft protection sleeve
  • O-Ring gaskets made of EPDM (FKM gasket on request)
  • Pipework made of 1.4301 stainless steel

Helix VE 22 to Helix VE 52

  • Impellers, guide vanes, stage housing made of stainless steel 1.4307
  • Pump housing made of cataphoretically coated EN-GJL 250 grey cast iron
  • Shaft of stainless steel 1.4057
  • 1.4404 shaft protection sleeve
  • O-Ring gaskets made of EPDM (FKM gasket on request)
  • Pipework made of 1.4301 stainless steel


  • Base frame: galvanised steel, with height-adjustable vibration absorbers for comprehensive insulation against structure-borne noise
  • Pipework: Complete pipework made of stainless steel, suitable for the connection of all conventional piping materials; the pipework is dimensioned according to the overall hydraulic performance of the pressure boosting system
  • Pumps: 1 pump of the series Helix VE 2 to Helix VE 52 is used. The air-cooled frequency converters mounted on the pump motor enable infinitely variable control between 25 Hz and a maximum of 60 Hz for all pumps of this series. All parts that come in contact with the fluid are made of stainless steel for the Helix VE 2 to Helix VE 16 series or of stainless steel/grey cast iron with cataphoretic coating for the Helix VE 22 to Helix VE 52 series; other versions on request. KTW/WRAS/ACS approval for all parts that come in contact with the fluid
  • Valves: The pump is fitted on the suction and pressure side with a standard shut-off device with DVGW approval mark and on the pressure side with a DVGW/KTW-approved non-return valve.
  • Diaphragm pressure vessel: 8 l/PN 16 arranged on the discharge side with a diaphragm made of butyl rubber, with DVGW/KTW approval, completely safe in accordance with food safety laws; for testing and inspection purposes, with a shut-off ball cock with drain and throughflow fitting with DVGW/KTW approval in accordance with DIN 4807
  • Pressure sensor: 4 to 20 mA, arranged on the discharge side, for control of the frequency converter

Scope of delivery

  • Factory-mounted, ready-for-connection pressure-boosting system checked for functionality and impermeability
  • Installation and operating instructions


Other mains connections on request

Consulting guide

Inlet pressure

The maximum inlet pressure (see Technical data) must be taken into account when configuring the system. The maximum permissible inlet pressure is calculated from the maximum operating pressure of the system minus the maximum pump delivery head at Q = 0.

Always observe the specifications in DIN 1988 (EN 806) when using and operating the pressure boosting system.

Pressure reducer

Fluctuating inlet pressure is compensated by the speed control integrated into the pump as long as the pressure fluctuation is not greater than the difference between the setpoint pressure value and the zero-delivery head of the single pump at minimum speed. If the pressure fluctuation is greater, a pressure reducing valve must be installed upstream of the system.

Residual-current-operated protection switch

When installing residual-current-operated protection switches in conjunction with frequency converters, bear in mind that only universal-current-sensitive residual-current-operated protection switches in accordance with DIN/VDE 0664 are to be fitted.

Wilo-WMS low-water cut-out switchgear

The series Helix VE pump being used is already equipped with an integrated dry-running detection as safety equipment for the pump.

Details about electronics/EMC

Single-pump systems up to and including 7.5 kW motor power:

  • Emitted interference in compliance with EN 61000-6-3
  • Interference resistance in compliance with EN 6100-6-1

Note: Systems to be used in residential buildings must be installed by personnel who have completed EMC training.


Installation and operating instructions

Wilo-Helix VE 22-36-52

Article Number 4151995
Edition 1601
Number of pages 39
Language en
PDF (8 MB)

Wilo-Helix VE 2-4-6-10-6

Article Number 4151993
Edition 1601
Number of pages 38
Language en
PDF (7 MB)

Wilo-SiBoost 2.0 Smart 1, Wilo-SiBoost Smart 1, Wilo-Comfort-Vario COR-1...-GE, Wilo-Comfort-Vario COR/T-1…-GE

Article Number 2535459
Edition 2023-08
Number of pages 72
Language en
PDF (31 MB)



Number of pages 1
Language language neutral
PDF (483 KB)
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