Short Two Compartment Distance
Piece
The short, two compartment distance
piece is recommended for use in corrosive applications, in order to keep
sour gas/lubricant in the cylinders 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.
An oil slinger may also be installed
on the piston rod, inside the inboard compartment. The outboard compartment
does not have sufficient length for an oil slinger.
The short, two compartment distance
piece is available as an option on the JG, JGA, JGW, JGR, JGJ, JGH, JGE,
JGT, JGK, JGC and JGD frames, and not available on the JGU, JGZ, 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.
Ariel Corporation Application Manual
2 November 2006