• Gaoshan Valve · Est. 1975 •
See the plant before you sign the PO.
We open our workshops, QC lab and certification records to every serious buyer — on-site, by live video, or through a third-party inspection body of your choice. No appointment gatekeeping, no staged photos.
Years
Employees
Valve Series
Countries Exported
• Factory Campus Exhibition •
What you’ll walk through
Four stops that matter most to buyers doing technical due diligence — casting, machining, assembly, and pressure testing.
Casting
Body & bonnet casting line
Machining
CNC precision machining
Assembly
Manual & automated assembly
Pressure Test
100% hydro / air test bench
• Choose How You Verify •
Every certificate we hold, verifiable
API monogram, EU PED, three ISO management systems, AAA credit rating and PRC manufacturing licenses — all scanned and downloadable, not just claimed.
• Choose How You Verify •
Three ways to confirm what we’ve shown you
Pick whichever fits your timeline and budget — all three lead to the same booking form below.
On-Site
Visit the plant in person
Walk the full production line yourself, meet the QC team, and inspect any batch on the floor. Zhengzhou is 1.5 hrs from Zhengzhou Xinzheng International Airport.
Live Video
Remote video audit
A real-time walkthrough over WeChat, Zoom or WhatsApp video — you direct where the camera goes, ask questions live, and request close-ups of any process or document.
Third-Party
Independent inspection body
We routinely host audits from SGS, BV, TÜV and Intertek. Nominate your preferred agency and we’ll coordinate the visit directly with them.