Our vacuum pump exhaust filter assemblies remove heavy concentrations of extremely fine oil droplets from vacuum pump exhaust to permit pumps to discharge into clean work areas or recycle clean gas to the process. These filter assemblies utilize one or more replaceable microfiber filter elements to coalesce the oil from the exhaust gas.
At the heart of the vacuum pump exhaust filter assembly is the two stage 50CS grade microfiber element which captures the oil mist droplets within the depth of the element’s wall and coalesces the mist into larger droplets, thus allowing gravity to drain them from the assembly. Since the coalesced liquid drains from the elements at the same rate that liquid droplets enter the elements, the elements have an unlimited life when coalescing relatively clean liquids, and they operate at their initial retention efficiency even when wet with liquid.
Our disposable 50CS Grade Microfiber Filter Elements are specifically designed for all vacuum pump exhaust applications. The filters have an efficiency rating of 99.99% at 0.01 micron and are designed to have an initial dry pressure drop of less than 2 psi when sized correctly. We recommend changing filter elements when the pressure drop reaches 7 psig or the pump manufacturers quoted maximum back pressure, whichever is lower. Do not undersize a filter assembly, since this will reduce performance and may damage the pump.
Since Headline Microfiber Filter Elements operate at their initial retention efficiency even when wet with oil, the filter elements need to be changed only when the back pressure on the pump reaches an unacceptably high level as a result of build-up of particles in the filter elements. There usually is a very low particle contamination in vacuum pump exhaust, so filter element life is quite long – one year or more in most applications.
The two stage filter element structure minimizes the possibility of carryover of coalesced oil, and the all-inorganic silica composition is completely resistant to lubricants and virtually any chemical found in vacuum pump exhaust. The maximum temperature limit for a filter assembly is determined by the seals or plastic materials in the system.
All vacuum pump filters have a drain port at their base to remove any collected oils. This port may be hard piped to continually drain into a reservoir.
Our vacuum pump exhaust elements are 100% interchangeable and equivalent to the Balston 371H series of vacuum pump filter elements.
Choose the correct assembly:
All Vacuum Pump Exhaust filter assemblies come complete with 50CS grade coalescing filter elements. Assemblies with multiple elements have an integral stainless steel mesh entrainment separator pad to reduce the possibility of oil carryover. This pad sits snuggly above the elements at the outlet port.
Three simple rules to choosing the correct Vacuum Pump Exhaust filter:
- For non-hazardous and non-corrosive, select our Aluminum Version.
- For leak-tight service because of toxic or hazardous gas, or if a corrosion-resistant stainless steel filter housing is required, select our Stainless Steel Version, designated with an “S” in the part number – example 430S-50CS
- Next select the assembly which has a flow capacity equal to or greater than the vacuum pump flow capacity.