3-3 TU corner balancer
- Size (tiles, width x length)
- 6 x 8
- Throughput unlimited
- Yes
Factorio BlueprintsAll belt balancersFactorio 3 to 3 Balancer Blueprint
Evens out three belts in 5 x 9 tiles with 6 splitters, throughput unlimited, with a 6 x 8 corner version that is too.

In-game render of the 3 to 3 balancer blueprint
String exported by Factorio 2.0.69. Decoded and checked by this site; not test-imported in the game.
Yes. Throughput unlimited means any group of input belts can feed any group of output belts at their full rate. If some inputs run dry or some outputs back up, the belts that are still in use keep moving at full speed. Choose this layout where belts will often be partly used, such as at the start of a main bus.
Built with express (blue) belts, splitters and undergrounds. The collection lists this layout as working with red, blue and turbo undergrounds, so you can rebuild it in any of those three tiers. Yellow is not on that list, and the collection has no yellow version of this configuration.
Compatible underground tiers listed by the source: red, blue, green (turbo). No yellow alternate in the collection.
The corner version turns the three belts 90 degrees in 6 x 8 tiles and keeps the throughput-unlimited property, so it is a straight swap where the line has to change direction.
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The string was exported from Factorio 2.0.69. Copy it, open the game and press Import string on the shortcut bar, then paste. This site decoded the string and checked the entities and size against the preview, but did not import it in the game.