What gets published
Announcements as issued, cases with their instrument readings, qualifications as listed. Where a figure has not been measured, none is given.
Innovation · 2026-08-31
Goweco Receives National Invention Patent for Nano-Screening Membrane
Our proprietary multi-layer nano-screening composite membrane has been granted a Chinese national invention patent, formalising the technology that delivers NAS 2 cleanliness in the VOP-N series.
Insights · 2026-08-31 · 4 min read
ISO 4406 Cleanliness Codes Explained for Plant Engineers
A practical walk-through of the ISO 4406:2021 cleanliness code, NAS 1638 and how they relate to typical hydraulic, turbine and lube oil systems. Includes target tables for common applications.
News · 2026-08-31
Goweco Launches Nationwide Mobile Oil Purification Service
A new fleet of trailer-mounted mobile purification units now serves industrial sites nationwide.
News · 2026-02-13 · 2 min read
2025 in review: annual meeting and staff awards
The year closed with a full operating review, a five-point plan for 2026 and awards for twenty staff and eight teams.
News · 2025-10-23 · 1 min read
Membrane research agreement signed with a marine science institute
A technology cooperation agreement covering membrane materials for marine applications was signed at the 2025 China-EU membrane technology conference.
News · 2025-09-13 · 1 min read
Four national and provincial designations in a single quarter
A national environmental equipment listing, a provincial first-of-its-kind equipment listing, a technology transfer award and a municipal industrial design centre.
News · 2025-08-08 · 2 min read
Five years, a hundred materials, one membrane
How nano-screening membrane filtration moved industrial oil purification from micron to nanometre precision — and why the team had to start by making the material.
News · 2025-06-25 · 1 min read
Municipal R&D centre designation for membrane technology
The city industry and IT bureau named the nano-screening membrane programme in its 2025 list of enterprise R&D centres.
News · 2024-11-15 · 2 min read
Joint research and testing base established with a university bionics institute
A joint base led by an academy academician and a foreign academy member will work on ultra-clean lithium-battery white oil and oilfield reinjection water.
2026.02.11
Annual review and awards ceremony
2025.10.18
Partnership with Harbin Institute of Technology (Weihai)
9
News items published
40+
Granted patents, invention patents over half
News, and the engineering behind it
Announcements go out as issued. Where a notice was issued as a short summary, it stays a short summary.
Technical notes are written from the case records: what the oil did, and what the instrument read once it was treated.
Why fire-resistant fluid gets its own machine
The fire-resistant fluid purification unit is built for ultra-fine cleaning of this oil in particular: it removes water and particle contaminants from the liquid efficiently, removes acidic substances from the fuel, prevents corrosion of the fire-resistant fluid system, and keeps the equipment using it safe to run. Both fire-resistant cases on record sit in this family — a phosphate-ester fluid whose varnish index went from 66.7 to 26, and a fatty-acid-ester fluid held at 800 ppm water. The varnish number and the acid content are what separate this oil from a hydraulic or turbine oil.
How an industrial oil stops working
Each of these is a case on record, with the reading that followed.
- 01 It takes in water A tank at 7% water before a unit was commissioned, 200 litres separated on the first day; turbine oil taking in 20 kg a day through a broken shaft seal; fire-resistant fluid emulsified year after year.
- 02 It carries worn particles A crankshaft producer's hydraulic station ran far over its contamination limit and read NAS 6 after treatment. Gear oil at a steel plant caused repeated failures until deep purification brought it back to a reuse standard.
- 03 It varnishes and turns acidic A phosphate-ester fire-resistant fluid read a varnish index of 66.7 at a captive power station, and 26 after purification. Acid removal matters on the same oil, because corrosion of the fuel system follows.
- 04 It gets thrown away too often Vacuum pump oil at an appliance manufacturer whose water content was over limit again and again, so the oil kept being replaced. After treatment: cleanliness NAS 3, water content 39 ppm. The record ends with the readings, not with a service life.
Industries served
Our application range covers petrochemical, steel, power, lithium, tyres, wastewater, waste oil, water treatment and more.
01
Petrochemical
02
Steel
03
Power generation
04
Lithium battery and lithium film
05
Tires and rubber
06
Industrial oily wastewater
07
Waste oil recycling
08
Water treatment
09
Coal chemical
10
Mining
11
Metal processing
12
Military and aerospace
The facts behind the announcements
Figures the company publishes about itself. Where a claim is the company's own assessment, the row says so.
| Founded | 2021, in the Weihai Economic and Technological Development Zone |
|---|---|
| Where the experience comes from | A predecessor founded in 2009. "Over a decade in the industry" describes the predecessor's age; the company itself was incorporated in 2021. |
| Core technology | Multi-purpose nano-screening purification membrane, reviewed and appraised by a provincial technical institute (company's own account) |
| Patents | More than 40 granted, invention patents over 50% of them |
| R&D share | Both above 10% of the company |
| Research assignments | 2 national assignments (new membrane materials, sludge treatment technology) and 3 provincial ones |
| Highest cleanliness reached | NAS 2 on the filtration product line |
| Product range | 100 nm and 50 nm grades among others, more than 30 products |
| Research team | 1 national-level talent, 1 provincial leading talent, 1 PhD, 3 masters, 7 senior engineers, plus 6 external university experts |
Before you enquire
What decides a proposal, and how the work is bought.
Can the equipment be rented rather than bought?
Yes. Rental, outright sale, on-site service and regional agency are all offered. Which one fits depends on how many machines you run and how far your service radius reaches.
What does an enquiry need to contain?
Oil type, kinematic viscosity, how much water is getting in, what the instrument reads now, and the target cleanliness class or water figure.
Do you service units in the field?
Yes. On-site service is one of the four ways of working, alongside rental, sale and regional agency. Service centres operate in several regions of China.
Are explosion-proof and flame-resistant units available?
Both lines exist as separate decisions. Which one applies is settled against the hazardous-area classification of the installation.
Is one unit good for several oils?
A unit is configured for the oils it will actually see. List every one before the proposal is written, because the filtration rating follows from that list.
Where are the units built?
At the Weihai works in Shandong. The company was incorporated in 2021; the technical practice behind it dates from 2009.
Nano-screening membrane
Physical filtration
Low-pressure drive
No secondary pollution
Online or offline
Varnish index
Water content
Cleanliness class
Decolourisation and regeneration
The credentials behind the announcements
The honours held by the company, in its own wording.
National high-tech enterprise
Listed among the national high-tech enterprises.
National technology-based SME
Listed among national technology-based small and medium enterprises.
Major environmental technology catalogue
Included in the National Catalogue of Major Environmental Protection Technology and Equipment.
Standard drafting participant
A participant in drafting the industry standard for ultrafiltration water treatment equipment (CJ/T170-2018).
Specialised and innovative SME
Provincial specialised-and-innovative small and medium enterprise status.
First-set technical product
Provincial first-set technical product recognition.
Low-carbon star
"Excellent Low-Carbon Star" recognition.
Circular-economy innovation award
Provincial award for a major circular-economy innovation result.
Standardisation pilot enterprise
Provincial standardisation pilot enterprise.
