Weighing booth VS laminar flow hood
The weighing booth and laminar flow hood have the same air supply system; Both can provide a local clean environment to protect personnel and products; All filters can be verified; Both can provide vertical unidirectional airflow. So what are the differences between them?
What is weighing booth?
The weighing booth can provide a local class 100 working environment. It is a specialized air clean equipment used in pharmaceutical, microbiological research, and laboratory settings. It can provide vertical unidirectional flow, generate negative pressure in the work area, prevent cross contamination, and ensure a high cleanliness environment in the work area. It is divided, weighed, and packaged in a weighing booth to control the overflow of dust and reagents, and prevent dust and reagents from being inhaled by the human body and causing harm. In addition, it can also avoid cross contamination of dust and reagents, protect the external environment and the safety of indoor personnel.
What is laminar flow hood?
Laminar flow hood is an air clean equipment that can provide a local clean environment. It can shield and isolate operators from the product, avoiding product contamination. When the laminar flow hood is working, air is sucked in from the top air duct or side return air plate, filtered by a high-efficiency filter, and sent to the working area. The air below the laminar flow hood is kept at a positive pressure to prevent dust particles from entering the working area.
What is the difference between weighing booth and laminar flow hood?
Function: The weighing booth is used for weighing and packaging drugs or other products during the production process, and is used separately; The laminar flow hood is used to provide a local clean environment for key process sections and can be installed above the equipment in the process section that needs to be protected.
Working principle: Air is extracted from the clean room and purified before being sent inside. The difference is that the weighing booth provides a negative pressure environment to protect the external environment from internal environmental pollution; Laminar flow hoods generally provide a positive pressure environment to protect the internal environment from pollution. The weighing booth has a return air filtration section, with a portion discharged to the outside; The laminar flow hood does not have a return air section and is directly discharged into the clean room.
Structure: Both are composed of fans, filters, uniform flow membranes, testing ports, control panels, etc., while the weighing booth has more intelligent control, which can automatically weigh, save, and output data, and has feedback and output functions. The laminar flow hood does not have these functions, but only performs purification functions.
Flexibility: The weighing booth is an integral structure, fixed and installed, with three sides closed and one side in and out. The purification range is small and is usually used separately; The laminar flow hood is a flexible purification unit that can be combined to form a large isolation purification belt and can be shared by multiple units.
Post time: Jun-01-2023