A short coupled distance piece, described by ISO-13631 as Type 1, is used when mixing of the cylinder lubricant and the crankcase lubricant is acceptable. Since oil and process gas will enter the crankcase from along the piston rod, the short, single compartment distance piece is recommended for use when compressing non-corrosive gasses. This distance piece will also keep the package arrangement at minimum width.

The short coupled distance piece is standard for the JGI, JGM, JGN, JGP, JGQ, JG, JGA, JGW, JGR and JGJ frames.