Menu

LEV Central

The Knowledge Base for LEV

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

Published on

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…

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

Published on

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…

HSE Guide P7: Printing with UV Curable Inks and Coatings

Published on

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.

HSG 258 CONTROLLING AIRBORNE CONTAMINANTS AT WORK – A GUIDE TO LOCAL EXHAUST VENTILATION (LEV) – copy

Published on

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 are all described. Sections on Manuals and Log Books, LEV Examination and Testing protocols and…

Video – “What Happens When a Centrifugal Fan Runs in Reverse”?

Published on

Latest OXYL8 LEV training video on YouTube which shows what happens when a Centrifugal fan is incorrectly wired (ie phases the wrong way round) – a situation which is all too common (estimated that approx 7% are incorrectly wired). The key point to note – and shown very well on the video – is that…

Poultry House Ventilation

Published on

Came across this interesting article on the subject of Poultry House Ventilation.  Great resource for anyone involved with chicken and other poultry accommodation ventilation.  Very topical in early 2017 with the Bird Flu housing requirements for all domestic birds/poultry. Download a copy here: Poultry Ventilation_chapter7

Emission and Exposure Control-Related Ventilation Regulations – USA

Published on

This neat summary document, produced in 2015 by the well-respected Industrial Ventilation specialist Dr Jeff Burton summarises the USA standards and requirements for Ventilation systems used to control personal exposures. A copy of this short document can be downloaded here:- 10-USA Standards Overview pdf 2015

CoSHH Essentials – Easy Steps to Control Chemicals

Published on

HSE Guide (looks like published Sept 2009) dealing with the foundations and “Technical Basis for the CoSHH Essentials: Easy Steps to Control Chemicals”. If you are familiar with Benchmarking (as per HSG258) then this document will provide you with so much more information on the fundamentals and will also allow you to consider more difficult…

Video – “How to Use the PITOT Tube”

Published on

New OXYL8 training video on YouTube which provides an excellent introduction to the PITOT Tube, how to make the connections to a Manometer and how to take correct readings in a duct How to Use the PITOT Tube

HSE Guide MR0 “Advice for Managers (Paint Spraying)”

Published on

This HSE Guidance/Information leaflet will help managers to comply with the Control of Substances Hazardous to Health Regulations 2002 (COSHH), as amended, to control exposure and protect workers’ health. It describes good practice for managing the control of exposure to Isocyanates from two-pack (2K) paints, seals, adhesives, etc. It is also useful for trade union…