China Ball Valve Exporter & Exporters

Floating ball valves rely on upstream pressure pushing the ball against the downstream seat to achieve isolation. They are mechanically efficient and cost-effective for smaller sizes (≤DN100 / 4 inches) and lower pressure ratings (≤Class 300). Trunnion-mounted ball valves utilize upper and lower mechanical anchoring shafts, allowing the seats to float toward the ball via spring loading and hydraulic pressure. Trunnion designs are essential for large diameters, Class 600+ services, and applications where lower operational torque is required to optimize actuation sizing.

Every production batch undergoes strict quality gates starting with spectrometry validation of raw melts, magnetic particle testing (MT) of castings, and automated CNC machining. Seat tightness and shell strength are 100% hydrostatically and pneumatically tested per API 598 and API 6D guidelines. Fugitive emission compliance is verified under ISO 15848-1 using helium mass spectrometry to identify any stem or gasket leakage below 10−6 mg/(s·m).

In sour gas applications containing wet H₂S and high pressure, standard virgin PTFE is vulnerable to explosive decompression (AED). We utilize virgin Devlon V-API, Virgin PEEK, or Carbon-Reinforced PEEK combined with FKM/FFKM O-rings that resist rapid gas decompression (RGD). In severe abrasive sour slurries, metal-to-metal seating featuring supersonic HVOF Tungsten Carbide (WC-Co-Cr) cladding provides impervious performance against sulfide stress cracking.

Yes. Our internal engineering department reviews custom engineering requirements including obsolete face-to-face dimensions for retrofit plants, high-temperature cryogenic extensions, custom ISO 5211 top flanges, and turnkey actuation integration (Pneumatic Rack & Pinion, Electric Multi-Turn, and Gas-over-Oil units) factory-tested and calibrated before container dispatch.

Each shipment includes an exhaustive Engineering & Quality Dossier: EN 10204 Type 3.1 Material Test Reports, API 598 / API 6D Pressure Test Certificates, NDE/NDT Inspection Records (PT, MT, RT where specified), Certificate of Origin, Paint Thickness & Adhesion Reports, and General Arrangement (GA) dimensional drawings for project as-built filing.