of raw materials, windblown dust, and other industrial processes. To the extent that leaks pose harm to the environment, they are fugitive emissions. Two common
types of body seals are screw
type and flange
type. While the screw
type is a stronger seal, enabling higher system pressure, the flange
type allows fast and easy maintenance with the valve in line. The screw
type consists of one or two threaded 'end screws' that screw onto the body of the valve after the
ball and seat packing have been...
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