purchase of biosafety cabinet for the department of hod, agb purchase of biosafety cabinet for the department of hod, agb , biosafety cabinet 1. biosafety cabinet with 30% air exhaust and 70% recirculation 2. inner dimensions: 900x610x675mm 3. hepa- filtered exhaust air in type a2 cabinet may be recirculated into the room or exhausted to the outdoors through a canopy exhaust connection. 4. worktop: stainless stell ( ss-304, ) exterior cabinet: cold rolled steel duly powder coated 5. hepa- filtered downflow air is a portion of mixed downflow and inflow air from a common plenum. 6. negative pressure air surrounding all biological contaminated ducts and plenums. 7. negative pressure surrounds the work are with double wall plenums for protection. 8. air drawn through pre-filter is made to pass through highly effective hepa ( high efficiency particular air ) filters. 9. should be fitted with hepa filter made from water resistant, fire retardant, imported micro fine glass fibre media; conforms to eu- 14 grade, with an efficiency rating better than 99.999% for 0.3 ?. 10. prefilter should be made from non- woven synthetic with hdpe mesh and al expanded mesh on air leaving side; conforms to eu- 4 / g-4 grade, with and efficiency of down to 10 micron. these filters can be cleaned by compressed air & also washable. 11. should be mounted on heavy tubular stand with lockable castors. 12. aerodynamic airflow grills maintain safety and prevent blockage. 13. splash proof sockets are provided for optimum convenience of using small electrical devices inside the cabinet. 14. uv lamp to produce uv rays of 253.7 nanometers and fluorescent lamp are interlocked. 15. ergonomic and comfortable 10 degrees sloped front window for comfortable head and elbow rest position, thus reducing fatigue. 16. the sash should be counterbalanced for smooth and lightweight operation with the standard opening 200mm +10mm for easier access to work zone enhanced user safety. 17. three- year warranty.