Die Nacktbar » A well-designed hood is the most imp

- stack to discharge the air outside the workplace.

To design a Local Exhaust System we must know the:

* physical state of the chemical (Is it a dust Wholesale NFL Jerseys Cheap , mist, fume, gas or vapor ?),

* chemical's toxicity and applicable exposure limits Wholesale NFL Jerseys Online ,

* physical properties of the chemical (Vapor pressure, boiling point, flash point),

* routes of worker exposure -- inhalation Wholesale NFL Jerseys From China , ingestion, skin contact,

* how, where and when the chemical is used Wholesale NFL Jerseys China ,

* how the worker does their job.

HOOD DESIGN

A well-designed hood is the most important component of an effective LEVS. The hood must be positioned so that it does not pull contaminated air through the worker's breathing zone. It should be easy to use and not interfere with the job that the worker is trying to do. It should be positioned as close to the point of contaminant generation as possible. The further it is from the point where the chemical is released into the air, the more airflow is required to capture the contaminant.

AIR VOLUME AND CAPTURE VELOCITY