NXF UNS S304/ 1.4301/SUS304/Z7CN18-09 Brass DN6-100 PN1.6-PN4.0MPa Stainless Steel Ball Valve with NPT Thread for Vacuum Service

1. Raw Material Selection and CuttingWe adopt high-quality stainless steel raw materials with stable density and excellent corrosion resistance. All materials are strictly inspected for hardness and surface quality before production. Qualified blanks are precisely cut according to valve specifications to ensure consistent size and provide a solid foundation for subsequent precision processing.

2. Precision CNC Machining and ThreadingThe valve body, ball core and valve seat are processed by high-precision CNC lathes. Special professional tools are used for standard NPT tapered thread machining to guarantee accurate thread angle, tight fit and good sealing performance. The inner flow channel is finely polished to reduce flow resistance and avoid residual dead angles.

3. Vacuum Sealing AssemblyProfessional vacuum-grade sealing parts are selected and installed in a dust-free standardized workshop. Workers assemble the ball core, sealing rings, valve stem and handle strictly following assembly standards. Every component is closely matched to ensure flexible switching and stable structural performance under long-term negative pressure working conditions.

4. Surface Treatment and PolishingThe finished valve body undergoes fine polishing and deburring treatment to remove surface impurities. The overall structure is anti-oxidation and anti-corrosion processed, effectively improving wear resistance and service life, adapting to complex industrial and vacuum working environments.

5. Strict Vacuum Testing and Finished Product InspectionAll valves pass professional vacuum leakage detection and opening and closing durability tests. We strictly check thread accuracy, sealing tightness and surface flaws. Unqualified products are reworked immediately. Only fully compliant products are cleaned, packaged and prepared for shipment.