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Company · About

A machine builder in Nanjing, since 2009

Kerke is a twin screw extruder manufacturer in Nanjing, designing and building co-rotating twin screw extruders, three-screw machines, two-stage lines and pelletizing systems. Screws, barrels and liners are machined in-house, which is why a wear package can be specified by material instead of picked from a catalogue.

Founded 2009
Delivered 2,000+ sets
Markets 70+ countries
Certification CE / SGS
1–4,000 kg/hOutput range across 11 machine families
15.6–135 mmScrew diameter, lab to production
24–48 hSpare parts dispatch for standard sizes
30–45 daysStandard delivery, test-run before shipment

What we build

Eleven machine families on one screw platform: lab and pilot twin screws from 15.6 mm, production twin screws to 135 mm, two-stage KTE/SE lines, triple screw KTE-T for dispersion-limited products, kneader compounding extruders, single screw and SE/SE recycling lines, seven pelletizing methods, gravimetric feeding and the auxiliary equipment that makes a plant run.

The Kerke works in Nanjing — screw elements, barrels and gearboxes machined and assembled under one roof, then run with material before shipment.

Machine overview · Applications by material

How we work

  1. The material comes firstFiller grade, bulk density, moisture, target loading and downstream process. Without those five numbers a quotation is a guess.
  2. A trial, not a brochure25–50 kg on a lab line: pellets, video, temperatures, screw speed, feeder settings and output per hour. 3–7 days.
  3. The line is specified around the wear dutyBimetallic liner and PM elements where abrasive; standard where not. The wear package is a quotation line item, not a hidden upgrade.
  4. Test-run before shipmentEvery machine runs with material in Nanjing, and the run record ships with the machine.
  5. Commissioning and after-salesInstallation drawings, English manual, commissioning support, and spare parts from our own workshop.

Service commitments

  • Spare parts: screw elements, shafts and liners for standard models dispatch in 24–48 hours.
  • Technical response: a named engineer answers within one working day, in English.
  • Documentation: English manual, electrical drawings, spare parts list, and the commissioning record from your own machine.
  • Certification: CE declaration and SGS inspection available with the shipment.

Brand and trading entity

Machines are sold worldwide under the Kerke brand. Export contracts, invoices and customs documentation are issued by Uptech, Kerke's exclusive export partner — the same team, the same factory, a separate legal entity for export formalities.

Related on this site: Exhibition news · Inside the factory · CE & ISO certificates · Customer cases · Video library

FAQ

Who builds Kerke extruders?

Nanjing Kerke Extrusion Equipment Co., Ltd., founded in 2009. Screw elements, barrels and liners are machined in the same Nanjing works where the lines are assembled and tested - nothing critical is subcontracted.

Where is the factory and can I visit?

The works is in Lishui district, Nanjing, China - about one hour from Nanjing South rail station. Visits and live video audits are by appointment; a 25-50 kg material trial can usually be arranged in the same week.

What warranty and support come with a line?

12-month warranty, 2-hour technical response on working days, spare parts dispatched in 24-48 hours, remote commissioning included and on-site commissioning as a quoted option.

Tell us your material — we will tell you the line

Send 25–50 kg and we run it on our lab extruder: pellets, running video and a capacity report back in 3–7 days.

Get a quote Send material for trial