Searching for a commercial truck valve factory in China returns hundreds of names, but only a fraction are real factories with their own brass machining and vulcanising lines. This guide covers what a specialist truck valve plant actually produces, why buyers source from China, and how to vet a supplier before the first container.
What a commercial truck valve factory makes
Commercial valves are brass clamp-in stems secured with a nut, built for high pressure and constant heat cycling. A serious factory covers the full commercial families, not just one or two models:
| Series | Key dimensions | Bend | Typical application |
|---|---|---|---|
| V3-20-4 / V3-20-6 | Φ16 x 90 / 115 mm | 27° | Truck and bus, the volume sellers |
| V3-22-1 / 58MS | Φ16 x 58 mm | 45° | High-pressure bus service |
| TR570 / TR571 / TR572 | Φ19 x 84-100 mm | Straight | Commercial truck wheels |
| TR571C / TR572C / TR573C | Φ19 x 90-100 mm | 90° or 27° | Wheels where a straight stem is unreachable |
| MS70-7 (70MS-7) | 40.5 + 29.5 mm | 7° | Ni-plated heavy-duty commercial and off-highway |
Most plants also run the passenger TR series and TPMS stems on parallel lines - see our tyre valve types guide for how the families fit together, and the commercial truck & bus valve range for current production models.
Why importers source truck valves from China
- Complete series under one roof - V3, TR57x, 58MS and agricultural valves from a single purchase order.
- Brass machining depth - China's valve cluster has decades of brass hot-forging and CNC experience behind it.
- Consolidated containers - truck valves ship in the same container as wheel weights, patches and seal strings, which is how distributors keep freight cost per unit down.
- OEM packaging at source - private label, barcodes and retail-ready packing done in the factory, not re-labelled at destination.
Vetting checklist: factory or trader?
- Production evidence - ask for workshop photos and a live video call from the line, not just catalogue renders.
- Certification - ISO 9001 as baseline; RoHS/REACH documentation where your market requires it.
- Batch dimensional checks - a valve that is a fraction short leaks at the rim seal, so ask how rim hole fit and thread dimensions are inspected per batch.
- Real-batch samples - evaluate samples pulled from an actual production run, then order against the sample.
- Complete supply - valves should arrive with cores and caps fitted, and cores/caps available separately as consumables.
What to include in your first inquiry
- Model list with quantities - for example V3-20-6, TR570 and TR414 with target quantities per model.
- Finish and packing - natural brass or plated; bulk or retail card; your branding or neutral.
- Destination port and market - so the quotation can reflect real freight and any market documentation.
Our team answers complete inquiries with FOB pricing within 24 hours. The full process - MOQ, samples, production lead time and shipping options - is laid out in our ordering guide.
Working with Century Auto Parts
Century Auto Parts is a commercial truck valve factory in Hebei, China, exporting to 50+ countries. We manufacture the V3-20, TR570-TR574, 58MS and MS70-7 commercial series alongside passenger TR valves, TPMS stems, wheel weights and tyre repair materials - all consolidatable in one shipment. Browse the truck & bus valve range, check the global supplier landscape, or send your model list for a quotation.
- Model dimensions and series coverage: Century Auto Parts published product data
- Export, MOQ and OEM details: Century Auto Parts published trade information