LEV Design

Moody Diagram

Useful diagram for estimating the relative duct roughness factor in calculating pressure losses in ducts.   It uses the Reynolds Number (Re) a dimensionless number which is obtained from where  is the density of the air at temp and pressures …

WIS23 – Wood Dust, Controlling the Risk.

This information sheet is aimed at local exhaust ventilation (LEV) users within the woodworking industry. It provides practical guidance on the health and safety risks from wood dust and how to control them. It will also help employers to ask …

G406 – New and existing engineering control systems.

Engineering controls range from small, on-gun solder fume collectors, through dust hoods, fume cupboards, glove boxes and spray booths, to large-scale industrial installations. All have the same hygiene requirements: to collect or contain the contaminant; to conduct it away from the …

L138 – Dangerous substances and explosive atmospheres.

This Approved Code of Practice (ACOP) and guidance provide practical advice on how to comply with the Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR). These Regulations require the elimination or reduction of risk of fire and explosion from substances …

Explosive Atmospheres – Classification of Hazardous areas (zoning) and selection of equipment.

Gases, vapours, mists and dusts can all form explosive atmospheres with air. Hazardous area classification is used to identify places where, because of the potential for an explosive atmosphere, special precautions over sources of ignition are needed to prevent fires …