The present invention encompasses a pneumatic system ( 6 ) with a pressure source ( 8 ) adapted for generating a medium under pneumatic pressure, a control valve ( 2 ) coordinated with the pressure source, via a first conduit (A), a piston-cylinder arrangement or a "motor" ( 1 ), whose working chamber ( 1 e) is coordinated, via a second conduit (B), with said control valve ( 2 ) and whose low-pressure or return chamber ( 1 f) is coordinated, via a third conduit (C), with one side of a coupling arrangement ( 10 A') whose other side is coordinated, via a fourth conduit (D), with said pressure source ( 8 ). Said coupling arrangement ( 10 A') is in the form of a unit ( 10 A) coordinated with the piston-cylinder arrangement ( 1 ) but discrete or separated from the piston-cylinder arrangement ( 1 ), Within said unit ( 10 A) and extending between connections associated with the unit there is disposed at least one direct or indirect coupling-in of a high-pressure regulator ( 11 ) and a low-pressure regulator ( 12 ).
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