Process for the production of series-produced valves used in...

F - Mech Eng,Light,Heat,Weapons – 24 – F

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F24F 13/10 (2006.01) B23K 31/02 (2006.01) B23P 15/00 (2006.01) F16K 1/42 (2006.01) F16K 25/00 (2006.01) F16K 27/00 (2006.01)

Patent

CA 2155468

The invention relates to a process for the production of series-produced valves which are used in heating, ventilating and air-conditioning systems and which comprise a cast-iron valve body, at least one stainless steel valve seat disposed in a flow restrictor opening in the valve body and an actuating rod having at least one flow restrictor, the actuating rod being taken out of the valve through a cover which closes an opening for the cover in the valve body, such opening being in alignment with the valve seat. The valve seat is welded into a casting serving as blank for the valve body without previous chip removal treatment of the casting surface, in one chucking. The blank is then finish-treated. Preferably, the valve seat is produced by build-up welding followed by chip removal shaping of the weld bead. - Fig. 1.

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