Butterfly-type gas valve - has housing in two identical halves with widened cylindrical portions accommodating butterfly

摘要: The valve has a cylindrical housing in two halves detachable from each other, which the rotates on spindle. (2, 3) are identical, and where they bear against other have widened portion (6, 7) extending round more than half periphery. When assembled together these portions offset 180 deg. relation to expose supporting faces (9, 10) opposite halves. spindle (4) is carried central bearings, butterfly (5) of larger diameter clear passage width through valve, lying support shut position.