The 8-7/8W:R cylinder long two compartment distance piece option has a long and a short distance piece, API-618 Type D and ISO-13631 Type 3. The remainder of the Ariel products use a Type C long two compartment distance piece. Ariel recommends either sweet natural gas or nitrogen for purge gas. The distance piece vents must also be piped to a safe area. No part of the piston rod alternately enters the wiper packing and the intermediate seal packing. This distance piece is recommended for use when compressing corrosive gasses.

This long two compartment distance piece is available as an option on all JGR assemblies (with R cylinders), and on JGW assemblies with 8 7/8” W Class or any R Class cylinder(s).