9230621705
9230621705

Helix FIRST V

Multistage in-line pump

High efficiency and robustness for large buildings and other fields of application.

  • IE3 fixed-speed motor ensures high efficiency
  • Durable and robust with pump housing made of grey cast iron with cataphoretic coating and the laser-welded/cast stainless-steel hydraulics (AISI 304)
  • Space-saving as a result of the compact design with integrated mechanical seal – with an operating pressure of up to 16 bar (above this with cartridge mechanical seal)
  • Maintenance made easy through convenient access to pump components, such as the bearing integrated in the lantern, as well as the spacer coupling and the cartridge mechanical seal (if used)
  • Suitable for high-temperature environments with a standard ambient temperature of up to 50 °C without power dissipation
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High efficiency and robustness for large buildings and other fields of application.

The Wilo-Helix FIRST V is a highly efficient, vertical and multistage pump with a robust pump housing made of grey cast iron and an IE3 motor. It is suitable for applications ranging from water supply and pressure boosting to integration in cooling circuits and industrial applications.
The compact design makes installing and operating the pump extremely convenient. The combination of a housing made of grey cast iron with corrosion-resistant stainless-steel hydraulics provides the Wilo-Helix FIRST V with exceptional operational reliability and high energy efficiency.

Design

Non-self-priming, high-efficiency multistage high-pressure centrifugal pump in vertical design with in-line connections

Application

  • Water distribution and pressure boosting
  • Industrial circulation systems
  • Process water
  • Closed cooling circuits
  • Fire-fighting systems
  • Washing systems
  • Irrigation

Equipment/function

  • Corrosion-resistant impellers, guide vanes and stage housings

Type key

Example: Helix FIRST V 3606/2-5/25/E/KS/400-50
Helix FIRST V Vertical high-pressure multistage centrifugal pump in in-line design
36 Flow rate in m3/h
06 Number of impellers
2 Number of trimmed impellers
5 Pump material
5 = Pump housing EN-GJL 250 cataphoretic-coated, Hydraulics 1.4307 (AISI 304L)
25 Maximum operating pressure in bar
16 = 16 bar + PN 16 flanges (≤ 16 m3/h: oval flanges)
25 = 25 bar + PN 25 flanges
30 = 30 bar + PN 40 flanges
E Seal type E = EPDM
K Cartridge type mechanical seal
S The coupling guard is on a line with suction and discharge ports of the pump.
400 Connection voltage in V

Technical data

  • Electrical connection: 3~400 V ±10 %, 50 Hz
  • Fluid temperature range: -30 to 120 °C
  • Max. operating pressure: 16, 25 or 30 bar
  • IP rating: IP55
  • Max. ambient temperature: -15 °C – +50 °C
  • Helix FIRST V 2 – 16: PN 16 with oval flanges, PN 25/PN 40 with compatible round flanges according to ISO 2531 and ISO 7005
  • Helix FIRST V 22 – 52: PN 16/PN 25/PN 40 with round flanges according to ISO 2531 and ISO 7005

Materials

  • Impellers, stage housings and guide vanes of stainless steel 1.4307 (AISI 304L) or 1.4401 (AISI 316)
  • Pump housing made of EN-GJL 250, cataphoretically coated
  • Shaft made of stainless steel 1.4057 (AISI 304L)
  • Sleeve under the mechanical seal 1.4404 (AISI 316L)
  • O-ring made of EPDM
  • Jacket pipe made of stainless steel 1.4301 (AISI 304)

Construction

  • Pumps can be adapted to specific circumstances on request (e.g. motor protection, ATEX, extended ambient temperature range).

Scope of delivery

  • Helix FIRST V high-pressure multistage centrifugal pump
  • Installation and operating instructions
  • Helix FIRST 2-16 (version PN16 with oval flanges): Cast iron counter flanges with the corresponding screws, nuts and gaskets

Installation and operating instructions

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

Article Number: 4143727

Issue date: 2023-03

Edition: 12

Language: en

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

Article Number: 4120943

Issue date: 02/2022

Edition: 12

Language: en

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Wilo-Helix V ATEX

Article Number: 4213806

Issue date: 2020-10

Edition: 04

Language: ar, cs, de, en, es, fr, it, pl, pt, ru, uk

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Wilo-Helix V, FIRST V, 2.0-VE 22, 36, 52, 80, 105

Article Number: 4275922

Issue date: 2026-04-17

Edition: 01

Language: en

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Group Statement

Group Statement REACH

Article Number:

Issue date: 2026-04-17

Edition:

Language: language neutral

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Standard Conformity

Standard Conformity 2224080-01

Article Number:

Issue date: 2025-03-12

Edition:

Language: language neutral

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