Two-piece coaxial foreline traps offer a wide selection of replaceable
filter element materials. Filter elements for a two-piece trap are
removable stainless steel screen cartridges filled with copper,
stainless steel or bronze wools, activated alumina, activated carbon or
dual element absorbent material.
Metal wool filter elements are used primarily for the trapping of pump
oil backstreaming through a vacuum system. During pump operation,
oil coalesces on the metal wool element and drains back to the
vacuum pump. Activated alumina effectively absorbs both acids and
water vapor while activated carbon adsorbs organics and water vapor.
The selection chart at the bottom of the facing page will help in
choosing a filter element for your specific application.
Filter cartridges are quickly and easily replaced by removing the
banded clamp that fastens a two-piece coaxial trap body. To minimize
down time, MDC recommends keeping spare filter elements on-hand
for quick replacement. Reusable elements may be cleaned and stored
for the next exchange. With the exception of the activated carbon and
dual element filters, all others are reusable. Filter elements are not
included with trap assemblies and must be ordered separately using
the part numbers detailed on the next page. Filters for 2", 4", 6" and
8" body diameters are included. Contaminated elements may be
cleaned with a solvent and allowed to dry before reusing.