Abstract: A connecting device for sealingly connecting together a pair of modular compressed air conditioning units, for example a filter and a lubricator, comprises a generally rectangular clamp adapted to engage a pair of ported flanges formed respectively on the units to be connected so as to urge the units into fluid-tight communication with one another via an intermediate ported spacer retaining O-ring seals. One side of the rectangular clamp is pivotally mounted so that it can be pivoted out of its operative position to permit reception of the flanges into the clamp and then pivoted back into its operative position in which it can be releasably locked by tightening a bolt. The device may be unitary in nature, i.e. has no separate parts that might otherwise get lost, and is simple to manufacture and manipulate.

Abstract: A fluid flow control valve of the ball type has a unitary body moulded in an elastomer and defining inlet and outlet passageways and a spherical cavity accommodating a plastic, ball-shaped closure member. The closure member is located in the cavity by forcing it, together with its actuating spindle, through a bore formed in the body until it is sealingly located, as a snap fit, in the cavity, during which process the bore is resiliently deformed outwardly but subsequently resiles into contact with the actuating spindle. The valve may, thus, simply have a pair of injection mouldings and, relative to prior ball valve constructions, is therefore simpler and more economic to manufacture. The body is integrally formed with a peripheral external recess whereby it may readily be sealingly engaged, simply as a snap fit, in, for example, an aperture formed in the base or a compressed sir filter bowl, the valve acting as a manual drain valve.