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Wilo-FLA Compact-1 Helix V | Wilo
Your advantages
Wilo-FLA Compact-1 Helix V

Your advantages

  • Compact system with one Helix FIRST V series stainless steel high-pressure multistage centrifugal pump, in accordance with DIN 1988 and DIN 14462 (redundancy for 2-pump systems)
  • Complete system which is supplied with a round tank (approved for drinking water) connected directly to the suction port of the pump
  • Hydraulic power within the series of up to 18 m3/h for 100 m delivery head
  • Easily adjustable and operationally reliable due to the FLA operating unit (TÜV tested)
  • Preconfigured bypass flow, for pump protection with low flow
Series description


Pressure-boosting system for firefighting in accordance with DIN 14462 for indirect connection.

With a vertical, stainless steel high-pressure multistage centrifugal pump in glanded version and break tank.


Fully automatic water supply for fire-fighting systems with type "F" fire hose reels in domestic, commercial and public buildings, hotels, hospitals, shopping centres and industrial systems


  • One Helix FIRST V 16, 22 series pump, equipped with IE3 motors
  • Automatic pump control via FLA control unit
  • Components that come in contact with the fluid are corrosion-resistant
  • Base frame made of galvanised steel, with height-adjustable vibration absorbers for insulation against structure-borne noise
  • Pipework made of 1.4301 stainless steel
  • Shut-off ball valve on the discharge side
  • Gate valve between pump and break tank
  • Non-return valve, on the discharge side
  • Preset valve at pump outlet for minimum bypass flow
  • Pressure switch, on the discharge side
  • Pressure gauge, on the discharge side
  • Diaphragm pressure vessel 8 l, PN 16, on the discharge side
  • Atmospherically ventilated break tank in accordance with DIN 14462 with free exhaust in accordance with EN 13077, type AB in accordance with DIN EN 1717
  • Round PEHD tank with water level indicator
  • Drainage
  • Float switch as low-water signal transmitter
  • Venting and exhaust with valve plate
  • Inspection opening with cover, which can be sealed without any tools
  • Internal wash plates to reduce the flow rate of the fluid
  • Inlet, draw-off connection
  • Overflow as free outlet, type AB in accordance with DIN EN 1717 with non-circular cross-section



Wilo-FLA Compact–1 Helix V 1604 DS8


Fire extinguishing system


with break tank


Number of pumps

Helix V

Pump series


Rated volume flow [m3/h]


Number of pump stages


Pressure control up to 8 bar (pump type-dependent)

Technical data

  • Mains connection 3~400 V, 50 Hz
  • Max. fluid temperature 50 °C
  • Rated pressure 16 bar
  • Operating pressure up to 16 bar
  • Inlet pressure from break tank < 1 bar
  • Nominal connection diameter on the pressure side R 11/2" - R 2"
  • Nominal connection diameter of the float valve in the break tank G2"
  • Operating unit protection class IP 54
  • Round break tank (540 l)


  • Impellers, diffusers, stage housing made of stainless steel 1.4307
  • Pump housing made of EN-GJL-250, cataphoretically coated
  • Shaft of stainless steel 1.4057
  • 1.4404 shaft protection sleeve
  • O-Ring gaskets made of EPDM (FKM gasket on request)
  • Round tank made of black PE-HD
  • Pipework made of 1.4301 stainless steel


  • Base frame: made of electrolytically galvanised steel and provided with height-adjustable vibration absorbers for comprehensive insulation against structure-borne noise; other versions on request
  • Pipework: complete pipework made of stainless steel 1.4301, suitable for the connection of all conventional piping materials; the pipework is dimensioned according to the overall hydraulic performance of the FLA pressure boosting system
  • Pumps: Helix FIRST V 16, 22 series pumps; all pump components in contact with fluid are made of stainless steel/EN-GJL-250, with cataphoretic coating. For more information about the pump, please refer to the catalogue section "High-pressure multistage centrifugal pumps"
  • Valves: A special brass valve is located at the upper end of the hydraulic section of the pump for returning a bypass volume flow to the break tank. This valve and the shut-off devices are sealed and protected against unauthorised adjustment.
  • Diaphragm pressure vessel: 8 l/PN 16 arranged on the discharge side. For testing and inspection purposes, equipped with a special throughflow fitting that enables the diaphragm pressure vessel to be shut-off and drained
  • Pressure switch: A pressure switch arranged on the discharge side, for activation of the central FLA controller
  • Pressure indication: Pressure gauge (ø 63 mm) on the discharge side; additional digital display of operating pressure and setting parameters in the FLA controller
  • Control device/controller: The system is equipped with a specific FLA controller as standard
  • Break tank: The system is supplied with a break tank (540 l). This is equipped with a float valve and a specific spray water device approved for drinking water to ensure compliance with the Drinking Water Ordinance

Scope of delivery

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

Installation and operating instructions

Wilo-Helix V, .. FIRST V, ..2.0-VE 2-4-6-10-16

Article Number 4143727
Edition 2023-03
Page format 209.9 x 297.0 mm
Number of pages 24
PDF (5 MB)

Wilo-Helix V, FIRST V, 2.0-VE 22-36-52

Article Number 4120943
Edition 02/2022
Page format 209.9 x 297.0 mm
Number of pages 28
PDF (7 MB)

Wilo-FLA Compact

Article Number 2537431
Edition 2019-07
Page format 209.9 x 297.0 mm
Number of pages 96
PDF (4 MB)

General overview

General Overview 2023 - International version

Edition 2022
Page format 209.9 x 297.0 mm
Number of pages 74
PDF (24 MB)

Certificate REACH

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (262 KB)