Usually to fabricate ball valves, where standard castings are not available, welding is preferred. Welding poses some major challenges, such as formation of heat affected zones which may have different material properties and color. Improper welding can also lead to leakage and rework. Moreover, the reworked valve's appearance is unacceptable. To overcome this hurdle, a new technology to join the flanges was developed. Here the flanges and valve bodies are screwed together and machined to eliminate gaps. These bonds are leak-proof and the appearance of the valves is excellent.
Belgaum, Karnataka, India
