Filter unit for filtering particles contained in exhaust gas...

Filter unit for wastewater treatment and production of...

Filter unit for welding apparatus

Filter unit having dual purpose valve assembly

Filter unit having reserve filter element

Filter unit packing ring

Filter unit with anti-drain back valve means

Filter unit with automatic backwash

Filter unit with by-pass and anti-drain back valve

Filter unit with by-pass valve means

Filter unit with signal device

Filter unit, cartridge and coupling means

Filter units

Filter units

Filter units

Filter units with end connectors

Filter wash water system

Filter web comprising fine fiber and reactive, adsorptive or...

Filter which can be unclogged manually

Filter with automatic bypass-shutoff