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Wilo-FLA-2 TRVB | Wilo
Your advantages

Your advantages

  • Heavy-duty system with Helix FIRST V series multistage high-pressure centrifugal pumps of stainless steel, in accordance with DIN 1988 and TRVB 128S
  • Hydraulic power within the series of up to 18 m3/h for 115 m delivery head
  • Easy adjustment and operational reliability with the CC-Fire switchgear for fire extinguishing systems in accordance with TRVB 128S
  • Automatic air vent valve on the head of every pump for protection of the hydraulics and mechanical seal
  • Pre-set throttle valve on the pressure side of each pump to protect the pumps at low volume flows
Series description


Pressure boosting system for fire fighting in accordance with TRVB 128S-2012 for indirect connection.

With 2 vertical stainless steel high-pressure multistage centrifugal pumps in glanded version


Fully automatic water supply for fire extinguishing systems with fire hose reels in domestic, commercial and public buildings, hotels, hospitals, shopping centres and also office and industrial buildings


  • 2 pumps in the Helix FIRST V 10 series, 16 equipped with IE2 motors up to 5.5 kW and IE3 motors from 7.5 kW
  • Automatic pump control via switchgear CC-Fire
  • Parts 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 stainless steel
  • Shut-off device on the suction and pressure sides of each pump
  • Non-return valve on the pressure side of each pump
  • Stainless steel throttle valve on the outlet of every pump
  • Automatic air vent valve on the header of every pump
  • Diaphragm pressure vessel 8 l, PN 16, pressure side
  • 2 pressure sensors, pressure side
  • Pressure gauge, pressure side
  • Accessories: Atmospherically ventilated break tank in accordance in accordance with DIN 14462 with free exhaust in accordance with EN 13077, type AB in accordance with DIN EN 1717



Wilo- FLA – 2 Helix V 1604 PN10 TRVB


Pressure boosting system for fire fighting


Number of pumps

Helix V

Pump series


Rated volume flow [m3/h]


Number of pump stages


Pressure control up to 10 bar (pump type-dependent)


in accordance with TRVB 128S

Technical data

  • Mains connection 3~400 V, 50 Hz
  • Max. fluid temperature 50 °C
  • Operating pressure 10 or 16 bar
  • Inlet pressure from break tank < 1 bar
  • Nominal connection diameter on the pressure side R 2"1/2 (3" for Helix V 1612)
  • Nominal connection diameter on the suction side Rp 2"1/2 (3" for Helix V 1612)
  • Operating unit protection class IP 54


  • Impellers, guide vanes, 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)
  • 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 10, 16 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: For each pump, the non-return valve has a 1.4571 needle-type throttle for returning the bypass volume flow to the break tank. All throttle valves and shut-off devices are sealed and protected against unauthorised adjustment. The pumps are equipped with an automatic air vent valve on the top of the hydraulics.
  • 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 sensor: A pressure sensor is arranged on the discharge side of each pump, for activation of the central CC Fire
  • Pressure indication: Pressure gauge (ø 63 mm) on the discharge side; additional digital display of operating pressure and setting parameters in the CC Fire switchgear
  • Control device/controller: The system is standard-equipped with a special CC Fire switchgear

Scope of delivery

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

General overview

General Overview 2024 - International version

Edition 2024
Number of pages 74
PDF (33 MB)