All Ariel frames require full flow filtration.

All Ariel frames with exception of KBU:Z/2, JGC:D:F:Z:U:KBB:V/4 and JGE:K:T:C:D:F:KBZ:U:B:V/6 are equipped with simplex, spin-on, pleated paper type filters.  These spin on filters have a nominal filtration of 5 micron.  The filter headers are equipped with pressure gauges to determine pressure drop across the filter. Ariel recommends replacing the filter element when the differential pressure across the filter reaches 10 psid at normal temperatures or at six month intervals (or 4000 hours, whichever comes first).

The KBU:Z/2, JGC:D:F:KBZ:U:B:V/4 and JGE:K:T:C:D:F:KBZ:U:B:V/6 frames are equipped with a simplex, cartridge style, pleated paper type filters.  The nominal filtration is 1 micron.  The filter housings are equipped with pressure gauges to determine pressure drop across the filter. Ariel recommends replacing the filter element when the differential pressure across the filter reaches 15 psid at normal temperatures or at six month intervals (or 4000 hours, whichever comes first).

Duplex lube oil filters with continuous flow transfer valves can be provided as an option. Duplex filters are to be mounted separately (not directly attached to the frame by Ariel), the original simplex filter must remain on the frame, operating in series downstream of the duplex filter. Duplex filter nominal filtration levels will match the frame mounted simplex filters noted above (5 micron on the smaller frames and 1 micron on the larger frames)