LEV Examination & Testing (Commissioning)

Fume Cupboards – Screaming Jelly Baby

A short video clip kindly supplied by AES, Glasgow showing the potential detrimental effect on containment during “The Screaming Jelly Baby” experiment! This experiment is carried out as part of the school curriculum.  It’s called the “Screaming Jelly Baby” experiment …

OXYL8 Captor Hood Calculation Apps for iPhone and Android

OXYL8 have developed a free LEV App for Android and iPhones which will (using Fletcher’s Equations) calculate the Hood Entry Velocity required for any shape of Captor Hood. The App permits Captor Distance calculations for Slots, Round, Rectangular and Oval-shaped …

HSE INDG365 “Working Safely with Metal Working Fluids”

This HSE Guidance leaflet aims to help employees who work with metalworking fluids understand the main risks to their health. It contains general advice on the precautions which they and their employers can take to avoid these risks. Full leaflet can …

HSE RR900 “Visualisation & Control of Solder Fume Exposure”

The full title of this HSE research Report is in fact “Visualisation & Control of Solder Fume Exposure – a Quantitative Assessment of LEV Effectiveness”. Published in 2011 by HSE, the document was prepared by HSL. From the introduction to …

Video – “How to Measure Captor Hood Control Distance?”

Latest OXYL8 LEV training video (Sept 17) on YouTube discusses the ways in which we can approach the verification of the Control Distance of a particular Captor Hood. More usually we use smoke release on the centreline out from the …

Video – “Captor Hoods – Basic Principles and Design Theory/Equations”

Latest OXYL8 LEV training video (Aug 17) on YouTube which provides an introduction to the basic operational principles of Captor Hoods and an outline of the mathematical theory for Captors. Fletchers Nomogram equations are discussed and reference made to an …

HSE Guide P40: Wide-Format Printing with UV-Curable Inks (Ozone)

This HSE Guidance Leaflet, which was published in 2005 describes good practice for digital (ink-jet) printing on machines up to 3.2 metres wide, using UV-curable inks. It advises the use LEV (extraction) for any Ozone produced by the process. Download …

HSE Guide P7: Printing with UV Curable Inks and Coatings

HSE Guide for Printing Industry, published in 2005 describes good practice for printing with UV-curable inks where the ink-curing lamps generate ozone. It discusses the use of LEV for controlling any ozone produced in the process. Download pdf of HSE …

HSE Guide P35 – Printing with UV-Curable Inks (Ozone)

A Guide produced by HSE in 2005 which describes good practice for printing using UV-curable inks. It discusses (briefly) that LEV should be used to remove any ozone produced by the process. Guide P35 pdf

HSE Guide – HSG 258 – Controlling Airborne Contaminants at Work – A Guide to Local Exhaust Ventilation (LEV)

Second Edition, Published by HSE 2011 This is HSE’s current guide on LEV and related topics.  Here you will find recommended Duct Velocities, Captor Velocities, Face Velocities, and other design criteria. The various types of hoods, filters, fans and discharges …