Product Details Welded Hollow Stainless Steel Valve Spheres The hollow valve ball of Zhenhong includes two types, one is sheer hollow and another is welded hollow. The welded hollow valve sphere is patented product of Zhenhong, it has more complicated manufacturing process, surely with more reliable quality than sheer hollow valve spheres. Generally speaking, It made of an outer shell and an internal pipe/ tube, welded product of the two parts after combination. Actually, it made from stainless steel sheets/ plates, through cutting, bending, rolling, welding, preforming, combination, ends welding, stem wedge welding, finally came to the blanks, the stiffener or ribs may put inside for large size balls while necessary. Currently Zhenhong can produce the welded type hollow valve balls up to internal diameter DN1000 (40 inch), and have proven experience for deli…
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