HF Grade 11 Moisture Separators

Impaction separation in a filter housing

Direction changes do the work; nothing loads up

The HF Grade 11 separator is the HF filter housing fitted with an impaction element instead of a coalescing one. Two stainless orifice tubes force the air through sharp changes of direction; water droplets and solids down to about 10 microns cannot follow the turns, hit the walls and drop into the bowl, taking roughly 95 percent of the liquid with them. There is no fibrous media to saturate, so the pressure drop does not climb as the separator does its job. It goes in after the aftercooler or receiver and ahead of the dryer, and it shares housings, connection codes, options and wall brackets with the HF filters, from a 20 SCFM bowl to a 21,250 SCFM vessel.

Where it sits and what it protects. Takes the slug of water off the aftercooler so the dryer separator and the 1 micron prefilter see mist, not puddles; Sizes 12 to 28 stocked with the internal automatic drain and liquid level window, 32 and 36 with the window; Where there is no separator at all upstream, the Grade 9 separator and 3 micron coalescer in one housing is the alternative; Wall bracket kits for housings 12 through 48 hang it beside the dryer on the same bracket as the filters.

Sized close to the actual flow. A 250 SCFM dryer takes HF11-32-8-L or HF11-32-12-L; a 780 SCFM plant takes HF11-48-20 with a drain added; A separator two sizes too large runs the orifice tubes below their design velocity and lets water through at light load; Replacement element E11-32 for the example above, E11-PV packs in the ASME vessels.