Abstract: An improved quarter-turn valve having an improved valve stem and handle is presented. The valve stem has four substantially square sides of desired predetermined dimensions and a top surface. The valve stem dimensions may conform to ISO 5211. The valve stem has a keyway extending vertically along one of its sides and a position indicator line extending diagonally across its top surface to positively indicate the status of the valve, whether open or closed. The valve handle valve handle has a substantially square bore that conforms to the side dimensions of the valve stem and a key that extends into the valve handle bore at a desired location. The key conforms to the dimensions of the valve stem keyway so that the handle may be attached to the valve stem only in a desired position with respect to the position indicator line so that the status of the valve, whether open or closed, is indicated by the valve handle as well as the position of the position indicator line.

Abstract: An improved quarter-turn valve having an improved valve stem and handle is presented. The valve stem has four substantially square sides of desired predetermined dimensions and a top surface. The valve stem dimensions may conform to ISO 5211. The valve stem has a keyway extending vertically along one of its sides and a position indicator line extending diagonally across its top surface to positively indicate the status of the valve, whether open or closed. The valve handle valve handle has a substantially square bore that conforms to the side dimensions of the valve stem and a key that extends into the valve handle bore at a desired location. The key conforms to the dimensions of the valve stem keyway so that the handle may be attached to the valve stem only in a desired position with respect to the position indicator line so that the status of the valve, whether open or closed, is indicated by the valve handle as well as the position of the position indicator line.