Abstract: A check valve includes a housing defining an inlet, an outlet, a passage between the inlet and outlet, and a sealing surface along the passage. A piston member is disposed about a longitudinal axis and has a sealing face disposed perpendicular to the longitudinal axis and a circular groove defined therein extending inward from the sealing face. An O-ring is disposed in the groove. A biasing member exerts a biasing force on the piston and thus forces the O-ring into sealing engagement with the sealing surface of the housing. The piston member is moveable from a first position in which the O-ring is sealingly engaged with the sealing surface of the housing and thus the outlet is sealed from the inlet, and a second position in which the O-ring is spaced from the sealing surface of the housing and thus the outlet is not sealed from the inlet.

Abstract: A check valve includes a housing defining an inlet, an outlet, a passage between the inlet and outlet, and a sealing surface along the passage. A piston member is disposed about a longitudinal axis and has a sealing face disposed perpendicular to the longitudinal axis and a circular groove defined therein extending inward from the sealing face. An O-ring is disposed in the groove. A biasing member exerts a biasing force on the piston and thus forces the O-ring into sealing engagement with the sealing surface of the housing. The piston member is moveable from a first position in which the O-ring is sealingly engaged with the sealing surface of the housing and thus the outlet is sealed from the inlet, and a second position in which the O-ring is spaced from the sealing surface of the housing and thus the outlet is not sealed from the inlet.

Abstract: A refrigerant relief valve manifold includes a valve body assembly and a valve member. The valve body assembly defines a lower inlet and a plurality of upper outlets. The valve body assembly further defines a plurality of low pressure drop passages. Each valve body assembly low pressure drop passage extends between the lower inlet and an associated upper outlet. The valve member is movably disposed in the valve body assembly. The valve member defines a plurality of low pressure drop passages. The valve body assembly further includes a plurality of true mountings. Each valve body assembly true mounting defining one the upper outlet. Each valve body assembly true mounting is structured to be coupled to a coupled element such as, but not limited to, a relief valve.