At YARN, we don't just manufacture parts; we build reliability into every engine.

Ruian Yuanshangrui Technology (YARN) is the leading manufacturer in high quality standard of diesel fuel pressure regulators in china,located in Ruian,Tangxia Town,has spent over 10 years perfecting a single mission: mastering the "heartbeat" of the vehicle—the fuel common rail system,with IAFT 16949 certification.

The parts fit for diesel pump/rail, like passenger vehicle,commercial vehicle,Truck,agricultural&construction machines.

Precision Driven by Passion

Innovation isn't just a buzzword for us; it’s our daily grind. Our R&D team doesn't just design; they solve problems. By bringing in advanced precision equipment from Japan and Germany and partnering with top-tier raw material suppliers from the US and Europe, we’ve ensured that every YARN component feels and performs like an original part.The daily output of solenoid valves is about 3000pcs.

The "200% Rule": Our Obsession with Quality

We believe quality is the lifeblood of any business. In an industry where a tiny defect can cause a massive breakdown, we settled on a standard that others find "excessive," but we find necessary: The 200% Test, with own developed test bench.

100% First Inspection: During the heat of production.

100% Second Inspection: Before it ever leaves our doors.

To us, "zero defects" isn't a goal—it’s our baseline. We pay attention to the details so that your customers don't have to.

A World of Solutions in One Place

With over 1,000 varieties of fuel pressure regulator, fuel metering valve,DRV,SCV, IMV, PCV, ,VCV and rail sensors,-from Bosch,Denso,VDO,Delphi series, we offer one of the most comprehensive portfolios in the industry. Whether it’s a passenger car,commercial vehicle,heavy-duty truck,construction and agricultural machinery , YARN is there.

Today, 30% of our products carry our own YARN brand—a symbol of trust—while the other 70% power some of the world's leading private label brand.

Our Promise to You

We aren't just looking for a buyer; we are looking for a partner to grow with. Our vision is simple: to provide high-performance, cost-effective solutions that help your business succeed.

When you choose YARN, you’re choosing a decade of expertise, a global supply chain, and a team that cares about your reputation as much as their own.

Let’s drive the future of the fuel system together.