There is no standard number, because pump cartons vary widely in size and weight. You work it out from the carton dimensions, the carton weight, how high cartons can be stacked and the container's weight limit. Volume usually decides it for light pumps, and weight can decide it for heavy cast iron pumps.
The example below is illustrative only. Ask the maker for a load plan based on your actual cartons.
Container sizes to work from
- A standard 20-foot container has internal dimensions of roughly 5.9 m long, 2.35 m wide and 2.39 m high, or about 33 cubic metres.
- A standard 40-foot container is roughly 12.0 m long with the same width and height, or about 67 cubic metres.
- A 40-foot high cube adds about 0.3 m of height, giving about 76 cubic metres.
- Payload limits depend on the container, the shipping line and road weight rules at both ends, so confirm them with your forwarder.
A worked example
Imagine a surface pump packed in a carton 0.40 m long, 0.30 m wide and 0.30 m high, weighing 20 kg packed. In a 20-foot container, that fits 14 cartons along the length, 7 across the width and 7 high by volume, which is 686 cartons.
Now check the limits. If the carton is only strong enough to stack 5 high, the count falls to 14 by 7 by 5, or 490 cartons. At 20 kg each, that is about 9.8 tonnes, well within a typical payload, so volume and stacking decide it here. A heavier pump might hit the weight limit first.
Real loads come in a little lower than the arithmetic, because cartons bulge, doors need clearance and loaders leave gaps. Treat the result as a ceiling, not a promise.
Pallets or loose loading
Palletised cargo loads and unloads faster and suffers less handling damage, but pallets take height and floor space. Loose-loaded cartons fit more units but take longer to unload. Many importers palletise because their warehouse cannot hand-unload a container quickly.
Mixed loads are common. Put the heaviest models on the floor and lighter ones above, and keep each model together so your warehouse can count it easily. Spares and cables fill gaps.
Why it matters for cost
Freight is charged per container, so the more pumps per box, the lower the freight per pump. A small change to carton size can add a full row. Ask the maker whether the carton can be tightened without weakening protection, and see how pumps are packed for the protection you should keep.
Container count also links to minimums, covered in MOQ for private-label pumps.
Next step
We ask the maker for a load plan before production, then supervise loading to make sure it is followed. Book a free sourcing review.