Abstract: A manually adjustable service adapter includes a manually adjustable actuation shaft for opening the valve of a charging port of a refrigeration system to permit the charging of refrigerant into such system. Actuation of such charging port results from an axially movable shaft which is manually adjustable by a rotatable knob which causes the shaft to move axially opening the valve of the charging port. Means are provided for preventing rotational movement of the axially movable shaft.

Abstract: A sealing system for high pressure fluid couplings wherein male and female valved coupling parts are interconnected while under fluid pressure, the sealing system including a pair of diverse characteristic seal rings axially spaced in the direction of relative coupling part movement. The seal ring closest to the pressurized medium is semi-rigid to prevent blow-out from its recess during coupling disconnection and interconnection while the second seal ring is of greater elasticity and sealability to prevent leakage. The axial spacing between the seal rings permits adequate internal support for the second seal prior to the opening of the coupling parts' valves.