Wilo Wilo-Helix V / Multivert MVI
Wilo-Helix V and Wilo-Multivert MVI high-pressure vertical multistage centrifugal pumps, with suction and discharge ports in line.
Wilo-Helix V is a high-pressure, vertical, multistage, non-self-priming centrifugal pump with suction and discharge ports in line. The impellers, diffusers and stage casings are in corrosion-resistant stainless steel; on variants with K in the code, the mechanical seal is of the cartridge type. Sizes 2, 4, 6, 10 and 16 have oval PN 16 flanges or round PN 25/PN 40 flanges, and sizes 22, 36, 52, 80 and 105 have round PN 16, PN 25 or PN 40 flanges, to ISO 2531 and ISO 7005. Multivert MVI 16…95 has the same vertical, multistage, in-line layout, with 1–16 stages, in PN 16 and PN 25 designs.
The Helix V code has the form Helix V 2202/2-1/16/E/KS/400-50: 22 is the flow, in m³/h, 02 the number of impellers, /2 the number of trimmed impellers, 1 the material combination, 16 the maximum operating pressure, in bar, E the EPDM seals (V for FKM), K the cartridge-type mechanical seal, and 400 the voltage, in V. For Multivert MVI, the code MVI 16 08 3/16/E/3-400-50-2 also begins with the flow (16 m³/h at 2 poles and 50 Hz) and the number of impellers (08), followed by the material, the PN rating, the seals, the voltage, the frequency and the number of poles. For a quotation, send us the full code from the pump nameplate and the motor power. When the item is available locally or at the supplier, delivery takes 24–72 h, and on order usually 1–4 weeks.
Models and codes
| Code | Note |
|---|---|
| Helix V 204-1/16/E/S/400-50 | Size 2, with 4 impellers, PN 16, EPDM seals. |
| Helix V 604-1/16/E/KS/400-50 | Size 6, with 4 impellers, cartridge mechanical seal. |
| Helix V 1002-1/16/E/KS/400-50 | Size 10, with 2 impellers. |
| Helix V 1605-1/16/E/KS/400-50 | Size 16, with 5 impellers, 4 kW motor, IE3 class. |
| Helix V 1609-1/16/E/KS/400-50 | Size 16, with 9 impellers. |
| Helix V 3602-1/16/E/KS/400-50 | Size 36, with 2 impellers, round flanges. |
| Helix V 5202-1/16/E/KS/400-50 | Size 52, with 2 impellers, round flanges. |
| MVI 16 08 3/16/E/3-400-50-2 | Multivert MVI code example: 16 m³/h, 8 impellers, material 3 (1.4301 / lined GG25 cast iron), PN 16, EPDM, 2 poles. |
Key specifications
| Helix V sizes (flow, m³/h) | 2, 4, 6, 10, 16, 22, 36, 52, 80, 105 |
|---|---|
| Maximum operating pressure | Helix V: 16, 25 or 30 bar (with PN 16, PN 25 and PN 40 flanges respectively); Multivert MVI: PN 16 or PN 25 |
| Liquid temperature, Helix V | with EPDM -30…+120 °C (+130 °C with cartridge seal, below 16 bar); with FKM -15…+90 °C |
| Liquid temperature, Multivert MVI | -15…+120 °C |
| Helix V materials | combination 1: casing 1.4301 (AISI 304), hydraulics 1.4307 (AISI 304L); combination 2: casing 1.4409, hydraulics 1.4404 (AISI 316L) |
| Power supply and protection, Helix V | 3~400 V ±10 %, 50 Hz; IP55; ambient temperature up to +50 °C |
The Wilo-Helix V range covers sizes 2–105. The Multivert MVI 16…95 series has Wilo instructions dating from 2008; for an existing MVI pump we look for the suitable current variant by the code and the nameplate data.
Frequently asked questions
What does the code Helix V 1605-1/16/E/KS mean?
16 is the flow, in m³/h, 05 the number of impellers, 1 the material combination (casing 1.4301, hydraulics 1.4307), 16 the maximum operating pressure of 16 bar, with PN 16 flanges, E the EPDM seals, and K the cartridge-type mechanical seal.
What data do you need for a replacement Multivert MVI pump?
The full code from the pump nameplate, with the PN rating and the type of seals, the motor power and voltage and, if you know them, the flow and the head. With these data we look for a suitable current variant for the existing connections and operating point.
Which seals are chosen for Helix V?
EPDM seals (letter E in the code) cover liquids from -30 to +120 °C, and FKM seals (letter V) liquids from -15 to +90 °C. For water-glycol mixtures, pure water or aggressive liquids there are special mechanical seals.
Other Wilo series
We quote the Helix V pump by code, and for a Multivert MVI pump we check the suitable variant by the nameplate data; hydraulic selection and installation are outside our quotation.
Updated: 2026-11-12