The short, two compartment distance piece is recommended for use in corrosive applications, in order to keep sour or corrosive gasses from entering the crankcase. It is a modified long single compartment distance piece. The inboard compartment is suitable for the application of a purge or buffer gas to maintain a positive pressure on the distance piece. This will assist keeping corrosive process gasses out of the crankcase. Ariel recommends either sweet natural gas or nitrogen for purge gas, and the distance piece vents must be piped to a safe area.

The short, two compartment distance piece is available as an option on the JG, JGA, JGW, JGR, JGJ, JGH, JGE, JGT, JGK, JGC, JGD and JGF frames, and not available on the KBE, KBK, KBT, KBU, KBZ, KBB and KBV frames.

The short two compartment distance piece may not be available on all -VS forged steel cylinders. Please refer to the performance program for availability of the short two compartment distance piece.

Refer to the Distance Piece Purge and Vent Arrangements for notes on a purge system for sour gas.