FHB-10 Laminar Flow Hood with Lead Glass

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Vertical laminar flow hood with lead glass model FHB-10. Dedicated to the laboratory and industry use, specifically for the protection of the product manipulated. Moreover, ensures excellent laminar flow at the worktop level thanks to the balanced perforation, and thanks to the considerable level of suction in the front part, which is calculated to obtain better vertical supply also in the work zone front part.

Operation

The air, pressure pushed by motorised fan into the plenum, passes through the absolute filter in the laminar flow, from up to down, and into the work chamber. From here the air passes through the perforated worktop, after mixing with the air coming from the front opening, it is sucked into the air re-entry manifold placed behind the wall, re-circulated and maintained constantly in negative pressure.
The portion of air (approx. 10-15% of the total capacity) is extracted through the appropriate conduit, generating the air re-entry from the outside, which guarantees adequate air change and maintains the reduced thermic drift.

Construction characteristics

Steel structure coated with epoxy dust by electro-diffusion, with perfect air-tightness and a negative pressure work zone.  Lateral panels made of safety tempered crystal. Removable worktop, made of  AISI 304 stainless steel sheet, glazed and perforated in order to obtain laminarity in the work zone, shaped in the longitudinal slots in the front part allowing an adequate re-circulating air change and a reduced thermic drift. Watertight liquid collecting bin, made in AISI 304 stainless steel, placed under the worktop. Direct coupling centrifugal motorised fan.
Designed to maintain constant air flow velocity in the chamber (0.45 m/sec) even in case of gradual HEPA filter clogging.
Absolute HEPA filter (output) with minimum guaranteed efficiency 99,999% (penetration of the 0.001%} on the D.O.P. aerosol of 0.3 micrometres.

Electronic speed regulation, with constant speed variation, high reliability and minimal sensibility to the temperature and tension drops. Switch-operated flow speed reduction, in case of nighttime operating (stand-by). Lighting with external fluorescent tubes. Control panel with membrane switches and light signals.