Optical sorting & inspection equipment
Built for rice, cashew, coffee, pulses, plastics and minerals — plus the high-frequency valves that keep every sorter running.
Product ranges
Most factories buy a sorter from one company and spare valves from another. We build both, which is why our pricing and our lead times hold up.
Chute-type from 32 to 512 channels, slow and fast belt machines, and a wet-dry heavy-duty model for high-dust or corrosive lines.
Millisecond-response ejector valves from ≥600 Hz, dimensionally compatible with mainstream sorter brands and customisable to your valve block.
Beryllium-window X-ray sources with AI imaging to find glass, stone, bone and dense plastic in bulk and packaged food.
Electromagnetic feeders with adjustable amplitude and frequency for a steady, even curtain into the sorting chamber.
AutoML training pipeline: capture, label, train and start sorting in about 20 minutes on simple materials — half a day on complex ones.
Digital radiography for small-animal clinics — flat-panel detector, workstation software and a compact footprint.
Replacement parts
We dimension our ejector valves against the machines already running in your plant, so you can stop paying OEM prices for a wear item that fails on a schedule.
Brand names are used only to describe compatibility. We are not affiliated with, endorsed by, or an authorised distributor of these manufacturers.
Why Kunhan
Post us your material. You get a written test report with before/after purity, reject ratio and recommended channel count — before any purchase order.
High-frequency valves from 600 Hz close the gap between detection and ejection, which is what keeps good product out of the reject bin.
Valves and feeders ship in 1–3 working days from stock, 7–15 days for build-to-order. Air freight reaches most Asian ports in under a week.
Valve group quantity, body specification and feeder dimensions are built to your machine, not just to our catalogue.
Machines and parts carry a 12-month warranty. Non-conformance is replaced free once a photo or video confirms the fault.
We manufacture in Hefei and sell direct, so there is no distributor margin between the workshop and your receiving dock.
Applications
If your material is not on this list, that is usually a conversation rather than a no.
Chalky, yellow and damaged grains, plus foreign matter.
Whole-kernel grading, shell and testa removal.
Defect removal and density / colour grading.
Soy, mung, red bean, kidney — colour and defect sorting.
Grade separation, mould and discolouration removal.
Purity and germination-grade selection.
PET, PP and HDPE colour separation and flake cleaning.
Quartz, feldspar and barite beneficiation.
How we work
Send the material, the capacity you need and your destination port. We will come back with a model recommendation and a landed cost.
