Helix V Series Wilo Pumps

Design

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

 

Application

  • Water supply and pressure boosting
  • Industrial circulation systems
  • Process water
  • Cooling water circulation systems
  • Fire extinguishing systems
  • Washing systems
  • Irrigation

Versions with stainless steel 1.44xx for aggressive media

Wilo Helix V Curve

Type key

Example: Helix V 2202/2-3/16/E/X/K/../400-50
Helix V Vertical high-pressure multistage centrifugal pump in in-line design
22 Flow rate in m3/h
02 Number of impellers
2 Number of trimmed impellers (optionally)
3 Pump material
1 = Pump housing 1.4301 (AISI 304)
Hydraulics 1.4307 (AISI 304L);
[Only Helix V 16.. and smaller]
2 = Pump housing 1.4409 (AISI 316L)
Hydraulics 1.4404 (AISI 316L)
3 = Pump housing EN-GJL-250 (cataphoretic-coated)
Hydraulics 1.4307 (AISI 304L);
[Only Helix V 22.. and larger]
4 = Monoblock pump housing EN-GJL-250 (cataphoretic-coated)
Hydraulics 1.4307 (AISI 304L);
[Only Helix V 22.. and larger]
16 Maximum operating pressure in bar
16 = 16 bar (PN 16 flange)
25 = 25 bar (PN 25 flange)
30 = 30 bar (PN 40 flange)
E Gasket type
E = EPDM
V = FKM
X “X-Care” special version
K Cartridge type mechanical seal
.. optional
400 Connection voltage in V
50 Frequency in Hz

 

Special features/product advantages

  • Efficiency-optimised, laser-welded 2D/3D hydraulics, flow and degassing optimised
  • Corrosion-resistant impellers, diffusors and stage housings
  • Flow and NPSH-optimised pump housing
  • Maintenance-friendly design with particularly robust coupling protection
  • Drinking water approval for all parts that come into contact with the fluid (EPDM version)

 

Technical data

  • Minimum Efficiency Index (MEI) ≥ 0.7
  • Electrical connection: 3~400 V (±10 %), 50 Hz
  • Fluid temperature range:
    • Helix V 2 – 16 (EPDM): -30 to 120 °C
    • Helix V 2 – 16 (FKM): -15 to 90 °C
    • Helix V22 – 52 (EPDM): -20 to 120 °C
    • Helix V22 – 52 for aggressive media (FKM): -15 to 90 °C (-30 °C with EPDM seal on request)
  • Max. operating pressure: 16/25/30 bar
  • Protection class: IP 55
  • Max. ambient temperature: +40°C (extended temperature ranges on request)
  • Available versions:
    • Helix V 2 – 16: PN 16 with oval flanges, PN 25 with round flanges in accordance with ISO 2531 and ISO 7005
    • Helix V 22 – 52: PN 16 and PN 25 with round flanges in accordance with ISO 2531 and ISO 7005

 

Equipment/function

  • Corrosion-resistant impellers, diffusors and stage housings

 

Description/design Helix Pumps

  • Pumps can be adapted to specific circumstances on request (e.g. motor protection, ATEX, extended ambient temperature range).
  • The Helix series is also available with an integrated frequency converter.

 

Materials

Helix V 2, 4, 6, 10, 16:

Standard version

  • Impellers, stage housings and diffusors made of stainless steel 1.4307
  • Pump housing made of stainless steel 1.4301
  • Baseplate and lantern EN-GJL-250 (cataphoretic coated)
  • Shaft made of stainless steel 1.4301 or 1.4462 (depending on version)
  • Sleeve under the mechanical seal 1.4404
  • O-ring of EPDM (FKM gasket on request)
  • Jacket pipe of stainless steel 1.4301

For aggressive media

  • Impellers, stage housings and diffusors of stainless steel 1.4404
  • Pump housing of stainless steel 1.4404
  • Shaft of stainless steel 1.4404 or 1.4462 (depending on version)
  • Sleeve under the mechanical seal 1.4404
  • O-ring of EPDM (FKM gasket on request)
  • Jacket pipe of stainless steel 1.4404

Helix V 22, 36, 52:

Standard version

  • Stage housings, impellers, diffusors of stainless steel 1.4307
  • Pump housing of cataphoretic-coated grey cast iron EN-GJL 250, loose flanges of EN-GJS 400 for Helix V 36-52.
  • Shaft of stainless steel 1.4057
  • Sleeve under the mechanical seal 1.4404
  • O-ring of EPDM (FKM gasket on request)
  • Jacket pipe of stainless steel 1.4301

For aggressive media

  • Stage housings, impellers, diffusors of stainless steel 1.4404 with passivation for highest possible resistance to corrosion
  • Pump housing: all parts which come in contact with the media are made of cast stainless steel 1.4409 ; loose flanges of cataphoretic-coated grey cast iron EN-GJL 250 for Helix V 22 / EN-GJS 400 for Helix V 36-52.
  • Baseplate of stainless steel 1.4301
  • Shaft of stainless steel 1.4404 or 1.4462 (depending on version)
  • Sleeve under the mechanical seal 1.4404
  • O-ring of FKM (EPDM gasket on request)
  • Pressure shroud of stainless steel 1.4404

 

Scope of delivery

  • Helix V high-pressure multistage centrifugal pump
  • Helix V 2 – 16: Oval counter flanges with corresponding screws and O-rings (PN16 variant) or bolts and gaskets if a counter flange is used (PN25 variant with round flanges)
  • Helix V 22 – 52: Bolts and gaskets if a counter flange is used (PN16 and PN25 with round flanges)
  • Installation and operating instructions
  • Integrated funnel to make it easier to fill the pump (Helix V 2 – 16 only)

 

General notes – ErP (ecological design-) directive

  • The benchmark for most efficient water pumps is MEI ≥ 0.70
  • The efficiency of a pump with a trimmed impeller is usually lower than that of a pump with the full impeller diameter. The trimming of the impeller will adapt the pump to a fixed duty point, leading to reduced energy consumption. The minimum efficiency index (MEI) is based on the full impeller diameter.
  • The operation of this water pump with variable duty points may be more efficient and economic when controlled, for example, by the use of a variable speed drive that matches the pump duty to the system.
  • Information on benchmark efficiency is available at www.europump.org/efficiencycharts

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