As a professional valve ball supplier,QT Valve has devoted ourselves to manufacture balls for valves and components including valve body,valve seat,valve stem and gland flange for more than 12 years. QT Valve offers you a full line of balls in A105, 1Cr13, LF2 410, 4130, 4140, F304, F316, 17-4PH, F51, Monel etc. Inaddition to manufacturing up to 56" valve balls, we also can manufacture valve body, valve stem, and valve seat according to your requirements. To achieve high qulity, our facility, occupying 12000 square meters, equiped with buffing machine, Vertical, horizontal milling machine,Electrolytic polishing equipment, Spherical grinding machine,(1/4 "to 30") spherical machine,Horizontal milling machine NC. What’s more, QT Valve has in place a quality assurance system conforming to the ISO 9001:2008 standard. The close follow up of Quality Management Approach in the involved processes makes our products one of the most demanded in the markets. The company’s IT system integrating all divisions starting from the design and technology, through to the pr...