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 extinguishing systems
- Washing systems
- Irrigation
Equipment/function
- Corrosion-resistant impellers, guide vanes and stage housings
Typekey
Example: | Helix FIRST V(F) 3606/2-5/25/E/KS/../400-50/-38FF265 |
Helix FIRST V(F) | Vertical high-pressure multistage centrifugal pump in in-line design
(F) = VdS-certified pump design |
36 | Flow rate in m3/h |
06 | Number of impellers |
2 | Number of trimmed impellers |
5 | Pump materials |
5 = Pump housing EN-GJL-250 (cataphoretic coating) hydraulics 1.4307 (AISI 304L) | |
25 | Maximum operating pressure in bar |
16 = Helix FIRST V 2.. to 16..: 16 bar: Oval flange PN 16 Helix FIRST V 22.. to 52..: 16 bar: DIN round flange PN 16 | |
25 = Helix FIRST V 2.. to 16.. -5/25/E/S/..: 16 bar: DIN round flange PN 25 Helix FIRST V 2.. to 16.. -5/25/E/KS/..: 25 bar: DIN round flange PN 25 Helix FIRST V 22.. to 52..: 25 bar: DIN round flange PN 25 | |
30 = Helix FIRST V 2.. to 52..: 30 bar: DIN round flange PN 40 | |
E | Gasket type E = EPDM |
K | Mechanical seal cartridge type |
S | The coupling guard is on a line with suction and discharge ports of the pump |
400 | Connection voltage in V |
50 | Frequency in Hz |
-38FF265 | Diameter motor shaft – lantern size (pump version without motor) |
.. | Optional |
Technical data
- Electrical connection: 3~400 V (±10 %), 50 Hz
- ≤ 4 kW 230 V/ 400 V; Δ/Y
- > 4 kW 400 V/ 690 V; Δ/Y
- Fluid temperature range: -20 to 120 °C
- Max. operating pressure: 16, 25 or 30 bar
- Max. inlet pressure of 10 bar
- Protection class: IP 55
- Max. ambient temperature: -15 °C – +50 °C
- Helix FIRST V 2 – 16: PN 16 with oval flanges, PN 25/PN 40 with round flanges according to ISO 2531 and ISO 7005
- Helix FIRSTV 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)
- Pump housing made of EN-GJL-250, cataphoretic-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, IE4 motor efficiency class, VdS certified Wilo-Helix pumps, ATEX, extended ambient temperature range).
Delivery state
- 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