Compressed air-actuated valve means

In a compressed air-actuated valve means for attachment to various devices, such as useful in chemical analyses, wherein a piston means actuates a slide member in the piston thrust direction and said slide member linearly glides on a base member having at least two spaced-apart apertures extending approximately perpendicularly to the gliding surface of said slide member, said apertures being connectable with one another on one side of said base member via at least one groove correspondingly arranged on a surface of said slide member and being connectable on the other side of said base member with intake and discharge nozzles, wherein the improvement comprises:

• said slide member (8) is interchangeably housed is a slide mount (10), said base comprises a pressure-plate (3) which is interchangeably housed in a valve housing (1), said apertures (4a . . . 4f) in said pressure-plate member (3) are connected via sealing rings (5) at the surface of said pressure-plate member (3) facing away from said slide member (8) with fluid-passageways (6a, 6b, 37) for connections external of said housing (1), at least one of such passageways (37) being directly connected with an open-bottom container (41) and being surround by a concentrically positioned groove (38) having a sealing ring (39) therein for supporting the open bottom of said container (41), said container (41) being provided with a beaded-edge (40) about the periphery of said open bottom thereof and which is adapted for positioning on said sealing ring (39), and an elastic ring (42) having an opening approximately corresponding to said beaded-edge (40) is snapped about said beaded-edge and attached to a surface of said housing.