Model · Co-rotating twin screw KTE
KTE-50B Twin Screw Extruder
The KTE-50B twin screw extruder is the smallest production-size KTE: 50.5 mm, 80–200 kg/h, B-class torque — the entry point where a pilot formulation becomes a small commercial run.
KTE-50B twin screw extruder — workshop photo 1, Kerke workshop, Nanjing
Co-rotating twin screw KTE — workshop photo 2, Kerke workshop, Nanjing
Co-rotating twin screw KTE — workshop photo 3, Kerke workshop, Nanjing
Co-rotating twin screw KTE — workshop photo 4, Kerke workshop, Nanjing
Co-rotating twin screw KTE — workshop photo 5, Kerke workshop, Nanjing
Co-rotating twin screw KTE — workshop photo 6, Kerke workshop, NanjingQuick answer
Choose the KTE-50B when a lab-validated recipe needs its first production machine: colour and filler masterbatch up to 85% loading, small-batch compounding, or 80–200 kg/h that used to be outsourced. It shares the building-block platform of the larger KTE models, so the screw set moves up without redesign.
Workshop photos and a running video — shot on our own lines, not stock images.
Parameters
| Model | Dia. (mm) | Speed (rpm) | Motor (kW) | Torque (N·m) | Output (kg/h) |
|---|---|---|---|---|---|
| KTE-50B | 50.5 | 500–600 | 55–75 | 2×525 | 80–200 |
Reference output measured on the stated material family; subject to a material trial. Motor and torque values are per machine, not per screw shaft.
Where it fits in the range
The KTE-50B sits at the bottom of the production range. It shares its 50.5 mm platform with the KTE-50D, which trades the economical B-class gearbox (2×525 N·m) for high torque (2×860 N·m) and 100–300 kg/h. Step up one diameter and the KTE-52B gives the same power class on a 51.4 mm screw with slightly more free volume.
What it runs
Typical duties: colour masterbatch at 20–45% pigment, filler masterbatch up to 85% CaCO3 with side feeder, masterbatch carriers such as PP/PE/ABS, and small engineering-compound batches. For glass-filled or >85% filler work at this scale, compare the KTE-50D first.
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Configuration options
Every KTE ships as a building-block system: screw elements on splined shafts, barrel modules that accept side feeders, liquid injection and vacuum vents, so the geometry is set by the formulation rather than fixed at the factory. Three choices define a KTE-50B quotation: the L/D (32–36 for simple filling, 40–48 with side feed and devolatilization, 52–60 for reactive duties), the wear package (standard 38CrMoAlA or bimetallic liner with PM/HIP elements where CaCO3, talc or glass fibre grind), and the pelletizing head (strand, water ring, air-cooled hot face or underwater — matched to the polymer, not to the model number).
FAQ
Is the KTE-50B a lab machine or a production machine?
It is a production machine at the small end: 80–200 kg/h reference output, built for continuous shifts. For trial work below 20 kg/h the KTE-20B or KTE-36B lab models are the better tool.
What is the difference between KTE-50B and KTE-50D?
Same 50.5 mm screw diameter, different gearbox: B-class 2×525 N·m at 500–600 rpm versus D-class 2×860 N·m at 300–800 rpm. The D costs more and gives 100–300 kg/h with headroom for high filler and glass fibre.
Can a KTE-50B run two-stage devolatilization?
Yes, within its L/D: a side vent plus vacuum vent fits at L/D 40–48. Above 48 the frame is at its limit — that is the point where we quote the KTE-65B instead.
Where these numbers come from
Parameters come from the Kerke parameter table and product master data sheet, cross-checked against commissioning records for the same model and duty. Where a catalogue value and a trial value disagree, the trial value is the one we quote.
Reviewed by the Kerke process team, Nanjing. Page updated 6 November 2026.
Send 25–50 kg — we return pellets, a video and a report with the parameters we used, in 3–7 days.
KTE-50B twin screw extruder — the short version
Note on KTE-50B twin screw extruder: what separates one machine from another is torque class, L/D and the wear package matched to your material, not the build standard. Shortlist from the tables, then confirm the choice on a trial with your own powder.
Planning an upgrade this quarter? Send the material and the target output — the configuration comes back within one working day.
Every quotation lists the wear package as a separate line, so its cost is visible from day one.
Questions are answered the same day, in English or Chinese.
Note on KTE-50B twin screw extruder: the data on this page was last verified on our own test line in Nanjing.
Not sure which KTE-50B twin screw extruder configuration fits? Describe the material and the pellet shape required — we answer with a recommendation, not a brochure.
A KTE-50B twin screw extruder from Kerke ships with CE documentation, a test-run record and a recommended spare set.
Related on this site: Extrusion lines by application · Extruder selection guide · free extrusion line quotation · Wikipedia: Twin-screw extruder