Air Science Purair Laminar Flow Hoods

The Purair Laminar Flow Hoods are a series of high-efficiency products designed to protect equipment and other contents of the work zone from particulates, for applications sensitive to such contamination.

The series includes vertical laminar flow (VLF) cabinets and horizontal laminar flow (HLF) cabinets, and is suitable for use with non-hazardous contaminants and when flexible access to the equipment in the work zone is desired. At the heart of the product line is the Air Science Multiplex ULPA Filtration Technology that creates a clean work environment over a wide range of applications.

The series is available in vertical and horizontal configurations with six different widths from 0.61 to 2.43 m. The rear wall of vertical flow cabinets is perforated to reduce work surface turbulence by removing some of the airflow to the rear. A high-capacity air handling system delivers a flow velocity of 0.4–0.5 m/s and the VLF and HLF hoods have a ULPA filter pressure gauge to measure filter performance.

All models are equipped with a stainless steel work surface and use ULPA filters that are 99.999% efficient at particle sizes between 0.1 and 0.3 µm. The series provides a sterile work zone for aseptic techniques, offering air cleanliness that is said to meet and exceed ISO Class 4.