The long two compartment distance piece option meets API 618 Type C and ISO-13631 Type 3. There are two long compartments, and each of the three seal sets can be purged (pressure packing, intermediate and wiper seals). This distance piece option provides the maximum amount of protection against flammable, hazardous, toxic and corrosive gasses entering the crankcase. Ariel recommends either sweet natural gas or nitrogen for purge gas. The distance piece vents must be piped to a safe area. No part of the piston rod alternately enters the wiper packing, intermediate partition packing, or pressure packing.  When the purged packing option is selected the intermediate, wiper and pressure packing are arranged for purge.

The long two compartment distance piece is available as an option on all JG, JGA, JGJ, JGH, JGE, JGT, JGK, KBT, KBK, JGC, JGD, JGF, KBZ, KBU, KBB and KBV frames.

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