HS-Nano: the next HEPA / ULPA generation04.2016
We are professionals in producing HEPA and ULPA filters for more than 40 years now. Our experience with ePTFE membrane technology reaches back more than a decade.
Our latest developments in HEPA / ULPA membrane technology will take the outstanding performance from niche implementations in the microelectronic industy to wide fields of common customer applications.
So far the difficulties to quality such filters in-situ with oil based aerosols is one of the main reasons why these innovative and energy saving filtertypes have not yet reached the popularity they could have.
The qualifying test on site is often a compelling requirement to maintain stable clean air processes, a requirement for approval and obligatory for certified processes. The tests are generally carried out in a way that oil-based aerosols are applied to the filter while photometer or discrete particle counters measure the efficiency of the installed filters. Depending on the measuring method there are remarkable aerosol concentrations generated and disposed in the filter to be qualified. Conventional PTFE media filters are usually sensitive to oils, which normally leads to an irreversible increase of the pressure drop with the usual test methods. This may negate the significant advantage of PTFE filters during the qualification.
We as manufacturer are using monodisperse PSL solid aerosol to perform final filter tests according to EN1822 for this kind of filters to avoid affecting the PTFE's performance. But many cleanroom areas are underlying international regulations ( GMP, FDA etc.) which prescribe and demand oil based aerosols for in-situ testing without allowing alternative test methods. Thus, the use of the advantageous PTFE media based HEPA and ULPA filters can be problematic due to the pressure increase on the qualification run.
HS-Luftfilterbau GmbH developed a revolutionary new filter series based on ePTFE filter media which is resistant against common oil based test aerosols(DEHS, PAO, DOP, etc.) applied for in-situ testing called HS-Nano SF-AL.
HS-Nano SF-AL type filters performance will not be affected by typical "field-testing" with oily aerosols. This allows customers from medical, food or other lifescience areas to profit from the outstanding performance of membrane based HEPA and ULPA filters.
Our HEPA / ULPA filter of type HS-Nano SF-AL are available from August 2016 and offer outstanding features up to filter class EN1822 U16 / ISO 29463 ISO65U such as:
- up to 60% savings in pressure drop (i.e. H14 at 0,45 m/s => Glass 110 Pa | PTFE 38 Pa)
- less noise emissions due to lower fan speeds
- massively saved energy costs
- with new developments and constructions we may save space by reducing up to 70% of the filter depth
- most robust design (ultra rigid filter media prevents defects by mishandling and clumsy installation)
- no reduction of the burst pressure at high air humidity (glass media filters may lose up to 90% burst strength when fully soaked).
- ideal at safety relevant processes thanks to its >400% higher burst strength compared to glass.
Please contat our international sales for more informations.