Image Number 3 for United States Patent #7325784.
A ball valve includes symmetric first and second valve casings (100) and (200) which respectively have first and second ball seats (120) and (220), first and second coupling flanges (130) and (230), first and second lever receiving parts (110) and (210), first and second ring-shaped grooves (132) and (232), a plurality of first and second coupling holes (131) and (231), and first and second stoppers (111) and (211). The ball valve further includes a ball (400) which is seated in both the first and second ball seats (120) and (220), a control lever (300) which is coupled to the ball (400) to control the ball, and a ring unit (500) which is seated in both the first and second ring-shaped grooves (132) and (232). The ball valve further includes a cap (600) which is fastened to both the first and second lever receiving parts (110) and (210).
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