HEPA Filters

This is a typical pharmaceutical ceiling HEPA housing (above technician’s head). Our certification technician is installing a new HEPA filter. This system is popular in the pharmaceutical industry. The HEPA filters can be removed creating little exposure to the plenum above, and less chance of contaminating the cleanroom in the process of changing the filter. The filter has a gel track around its perimeter (blue) which seals into a knife edge in the housing

Picture of an ISO Class 5 cleanroom using terminal HEPA filters in a T-bar ceiling. Terminal HEPAs are an excellent option where opening up the ceiling for filter removal does not create significant contamination problems for the cleanroom process. This type of filter provides a large quantity of supply air at a low pressure drop. It is difficult to damage this HEPA filter because of the protective screen on the downstream side and the metal backing on the upstream (air entering) side. Terminal HEPAs have a duct connection collar on the upstream side to connect to flex duct, which ties into the supply air duct. This HEPA is popular in the medical device industry, injection molding facilities, and many other industries requiring cleanrooms.

This image shows a cleanroom under construction with room side replaceable Fan Filter Units (FFU’s) in a T-Bar ceiling. Units can be wired to a control box outside the cleanroom or set up with a MODBUS program and tied into the building control system. Room side replaceable (RSR) units are available with ECM motors, ULPA filters, PAO injection ports, prefilters, gel or gasket seal HEPA filters, protective screen options, and more. Room side replaceable FFU’s are often used in pharmaceutical manufacturing, semiconductor facilities, and USP <797> compounding pharmacies. They can be individually ducted to air supply ducts, or placed in open plenum designs.

Gel seal HEPA filter housing containing three HEPA filters with pleated prefilters. This V-Cell HEPA is rated at 2000 CFM @ 1.0” water gage. The housing has an extraction bar to pull the filters off the knife edge when replacement is necessary. Such housings can be manufactured to accept gel or gasket seal filters. The housings are available in all welded, partially welded and caulked, and standard galvanized steel or stainless steel construction. Precision Air Technology sells all types of housings and HEPA filters for them. We stock HEPA filters at our Morrisville facility.

To purchase Hepa Filters, call 919-812-6846, or e-mail at info@precisionairtechnology.com