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Filter Manufacturer in China

Hydraulic, oil, fuel, air and coolant filters for construction and agricultural machinery — made in our own plant in Ruian, Zhejiang since 2005.

2005Manufacturing since
25,000 m²Plant area in Ruian
5Production lines
8MFilters a year

What we manufacture

Seven filter families for construction and agricultural machinery, all produced in our own plant rather than bought in for resale:

Oil FiltersFuel FiltersFuel-Water SeparatorsHydraulic FiltersAir FiltersCoolant FiltersOther Filters

That covers 938 part numbers across 40 machine brands — Komatsu, Hitachi, Caterpillar, Doosan, Hyundai, Kobelco, SANY, XCMG, SDLG, LiuGong, Volvo and the rest of the Chinese, Japanese, Korean and European ranges found on site.

Our plant

The factory sits in Ruian, Zhejiang — the filter cluster of eastern China, where media, housings, seals and tooling are all within a short drive. It covers 25,000 m², runs five automatic production lines and employs more than 150 people. Annual capacity is 8 million filters, of which roughly two thirds is export.

Keeping media supply, stamping and assembly that close together is why we can run small batches without the price jumping — a 500-piece trial order and a 50,000-piece repeat order go through the same lines.

Who we supply

Standards we work to

Filters are specified and tested against the standards your market recognises: ISO 16889 for hydraulic multi-pass, ISO 4548 for lube, ISO 4020 for fuel and SAE J726 for air. Tell us which one your customer or regulator asks for and the quotation is built around it — we would rather quote to your standard than argue about whose test is fairer.

How we quote

Send a part number, a machine model, or a photo of the filter you are replacing. We come back with price, minimum quantity and lead time for that specific model. If a dimension is not in our table, we ask for it rather than guess — a filter that fits badly is worse than a filter that costs more.

Send us a part number

Price, MOQ and lead time for the exact model you need — usually back within one working day.

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Questions buyers ask

Are you a factory or a trading company?
A factory. Ruian GOOZO Auto Parts Co., Ltd. has manufactured filters in Ruian, Zhejiang since 2005. The plant covers 25,000 m² with five automatic production lines and an annual capacity of 8 million filters.
What is your minimum order quantity?
It depends on the model — a number we already tool for can run in small batches, while a new housing needs a larger first run. Tell us the part number and the quantity you have in mind and we will confirm against that model.
Can you produce filters under our own brand?
Yes. Private label covers the filter itself, the label, the box and the part numbering. We can also work from your drawing if you need a specification we do not currently list.
Do you supply samples?
Sample arrangements depend on the model and whether it is a catalogue number or a custom build. Ask for the specific part and we will confirm what we can send.
Which machine brands do you cover?
Forty brands across excavators, wheel loaders, dozers, cranes, trucks and agricultural machinery — including Komatsu, Hitachi, Caterpillar, Doosan, Hyundai, Kobelco, KATO, Sumitomo, SANY, XCMG, SDLG, LiuGong, LonKing, Lovol, Volvo and John Deere.