Machine · Single screw SE

Single Screw Extruder SE-50 to SE-200

The single screw is not obsolete: for regrind, agglomerate and washed flake it is the cheapest way to build pressure, provided the feeding and filtration are right. A reference single screw extruder page from Kerke.

Updated 6 November 2026

Scope 100–2,000 kg/h, Lowest Cost per kg

Delivery 30–45 working days

Voltage built for destination

Single screw SE — workshop photo 1, Kerke workshop, Nanjing

Single screw SE — workshop photo 2, Kerke workshop, Nanjing

Single screw SE — workshop photo 3, Kerke workshop, Nanjing

Single screw SE — workshop photo 4, Kerke workshop, Nanjing

Single screw SE — workshop photo 5, Kerke workshop, Nanjing

Single screw SE — workshop photo 6, Kerke workshop, Nanjing

Running video — Single screw SE, Kerke workshop

Quick answer

The SE single screw range covers 50–200 mm at 100–2,000 kg/h. It is the lowest-cost way to melt, filter and pelletize regrind, and the discharge stage of every two-stage line. For recycling and strap/sheet lines it is often the whole machine.

SE-50–SE-2008 models

10–800 kg/houtput

28–36screw L/D

Workshop photos and a running video — shot on our own lines, not stock images.

Parameter table

**Table 1.** Single screw SE — models and reference output.
Model	Screw dia. (mm)	L/D	Motor (kW)	Output (kg/h)
SE-50	50	25–30	11–15	30–80
SE-65	65	25–30	18.5–22	60–150
SE-90	90	25–33	37–45	150–300
SE-100	100	25–33	45–55	200–400
SE-120	120	25–33	55–75	300–600
SE-150	150	25–33	90–132	500–1,000
SE-180	180	25–33	132–185	800–1,500
SE-200	200	25–33	185–250	1,000–2,000

Reference output measured on the stated material family; subject to a material trial. Motor and torque values are per machine, not per screw shaft.

When a single screw is enough

If the material is already compounded and you only need to melt, filter and pelletize — regrind, strap, sheet, film — a single screw does the job at roughly half the cost of a twin screw of the same output. The exception is material with very low bulk density (film, woven bag), which needs a compactor or forced feeder in front.

Standard line configurations

PE/PP film recycling: compactor + SE-150/180 + filtration + water ring.
PET strap: SE-90 with melt pump and die-head for 1-out-2 or 1-out-4 strap.
Sheet: SE-120/150 with a sheet die and three-roll calendar.

What this machine is normally bought for

Waste Plastic Recycling Pelletizing Line

Recycling output is decided at the feeder, not at the screw. Film needs forced feeding and pre-compaction; the same ex…

Film, Bottle Flakes & Regrind

PET Bottle Flake Recycling & Pelletizing Line

PET is judged on one number after pelletizing: intrinsic viscosity. Water and heat destroy it, so drying, low-shear sc…

Keep the IV

FAQ

What can a single screw do that a twin screw cannot?

Handle inconsistent regrind at low cost per kg/h. A single screw is tolerant of bulk density variation as long as a forced feeder is fitted.

Does it need a screen changer?

For recycled material, always. A hydraulic screen changer with 2–4 screens keeps the line running while the contaminated screen is swapped.

What output can I expect on film?

Roughly 40% of the pellet capacity of the same machine, because loose film has a bulk density of 80–150 kg/m³. Pre-compaction or forced feeding is what recovers the difference.

Where these numbers come from

Screw diameters, speeds, motor ratings, torque and reference output come from the Kerke parameter table and the product master data sheet, and are cross-checked against commissioning records. 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.

Need a capacity number for your material?

Send 25–50 kg — we return pellets, a video and a report with the parameters we used, in 3–7 days.

Get a quote Send material for trial

Single screw extruder — the short version

Note on single 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 single screw extruder: the data on this page was last verified on our own test line in Nanjing.

Not sure which single screw extruder configuration fits? Describe the material and the pellet shape required — we answer with a recommendation, not a brochure.

A single screw extruder from Kerke ships with CE documentation, a test-run record and a recommended spare set.