Technical · Oct 20, 2026 · 5 min read
How to read a Multi-Wing impeller code: the 800/8-8/45/PAG/7ZL example
The long code on the label is the impeller’s ID card. We explain every part, from diameter to hub mounting, with an example.
Why does the code matter?
Because Multi-Wing impellers are modular, the same profile can be built with different diameters, blade counts, pitch angles and materials. Simply saying “4Z blade” is therefore often not enough. The code on the hub label gives all this information in one line and is the fastest way to source the identical product.
Example: 800/8-8/45/PAG/7ZL/38/10/82/A
- 800 — Impeller diameter (mm).
- 8-8 — The first number is the number of fitted blades, the second the number of blade sockets in the hub. A code like 6-12 means 6 blades on a 12-socket hub; empty sockets are closed with blanking caps.
- 45 — Pitch angle (degrees).
- PAG — Blade material (glass reinforced polyamide). PPG and AL are other common materials.
- 7ZL — Profile (7Z) and rotation (L: left, R: right).
- 38/10 — Bore diameter and keyway width (mm).
- 82 — Hub / center boss size.
- A / B — Hub mounting direction (suction or pressure side).
If part of the code is worn off
Labels can become unreadable over time. Measure the diameter tip to tip, count the blades, check the profile marking at the blade root (e.g. 4ZL) and take a few clear photos. Upload the photos to your quote list and let us complete the missing details.
