There are many chemicals/medicines and other gases which need to be preserved at certain temperature without and disturbance or any bacteria. Such experiments are usually carries out in a laboratory wherein theses chemicals, gases or medicines are kept safe. Such of these elements may need a proper quantity of pure air in order to maintain its purity and properties. These chemicals are kept contamination free through the process called the laminar flow system. This is a process of keeping substances adulteration or contamination free and maintaining it in its purest form. There are dust free hoods which are very sensitive towards contamination and need a laminar flow system in order to maintain its purity.
Basically depending upon the type of content in the system box there are two types of laminar process which are carried on. One is the vertical laminar flow hood and another is the horizontal laminar flow. However due to the structure and design preferences in most of the laboratories vertical laminar flow is practiced to keep the substances in the system box away from contamination.
The working of vertical laminar flow hood
The design of a vertical laminar flow hood is such that it has a duct on the top which allows the air to pass within the system. It also has a perplex exhausts and a base with suitable holes in it.
As per the traditional working structure of a laminar flow hood the main filter is generally at the top which leads the laminar flow to the downward direction. As the laminar flow is downward moving it swipes away the minute particles near the area which is surrounded by a barrier which is mostly the front opening side. Due to vertical flow area the micro contaminants in the room settle at the floor or bottom surface of the room and allow only the purest air to pass inside the system. Usually if this procedure of vertical laminar is carried out efficiently if allows 99.99 % pure air to pass inside the surface. In case if any operations are to be carried on with the substances inside the system than it should laminar flow should be done at least 15 minutes prior to it.
Vertical laminar systems hood can also be also be designed and made in a lab bench and the process can be carried on easily. However any of the laminar systems are not at all suitable for systems which contain radioactive or other highly active and dangerous chemicals/gases in it. If any experiments are to carry on for radioactive chemicals then it should only be done under scientists or expert guidance.
Even though vertical laminar system is used in most of the laminar process even horizontal laminar process may be used in the labs depending upon the flow of air they want, the purity, and the and also the direction installation structure. After every laminar the hoods and surface areas need to be clean off in order to maintain hygiene level and safety standards.