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 equations cannot be run backwards eg to determine Captor Distance (trust me several uni maths people have tried! :-)) but by typing in different distances into…
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 be downloaded by clicking on the URL below:-
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 the Research Report:- “Colophony or Rosin Based Solder Flux Fume is a known cause of…
Occasionally there may be a need to measure aerosol particulates in air and there are instruments to do this ….. but they work on two fundamentally different ways. This article by TSI guides you through the differences and might assist you to select the best option for your application. The article provides a basic understanding…
Very useful guide, clearly set out and with simple but effective diagrams from the Filtration Group. This information sheet looks at ATEX compliant filters for removing dusts. Click on the URL link below to be able to download a pdf copy:-
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 hood face until the first ‘whisp’ of smoke is not controlled. From there most surveyors…
Now available – a dedicated adaptable test piece to attach to MIG LVHV welding hoods which permits Flowrates and hood entry Static Pressure to be measured using a Pitot tube/manometer (not supplied) as part of LEV Thorough Examination and Test (TExT) undertaken on on-tool welding units. Available from LVHV Hood Test Adaptor
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 OXYL8 (free to download) Excel spreadsheet which will do all the hard number crunching for…
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.
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.