Dual pendulum valve assembly has annular cover movable within interior space between two positions where cover protects valve seat of opening or is spaced from valve seat so valve body can engage valve seat and seal opening

摘要

The assembly is characterized in that an annular cover (26) is movable within an interior space between one position where the cover protects a valve seat of the second opening (20) and a second position where the cover is spaced from the valve seat such that the second valve body can engage the valve seat and seal the second opening. - DETAILED DESCRIPTION - The assembly (10) has a housing (16) with an interior space and a pair of openings through which fluid can enter and exit the interior space, two valve bodies, each movable within the interior space between an opened position allowing fluid to pass through the respective first and second opening and a closed position in which the valve body seals the respective first and second opening.