The negative pressure weighing booth, also called sampling booth and dispensing booth, is a special local clean equipment used in pharmaceutical, microbiological research and scientific experiments. It provides a vertical one-way air flow. Some clean air circulates in work area, and some is exhausted to nearby areas, creating negative pressure in work area. Weighing and dispensing dust and reagents in equipment can control the spillage and rising of dust and reagents, prevent the inhalation harm of dust and reagents to the human body, avoid cross-contamination of dust and reagents, and protect the safety of the external environment and indoor personnel.
Modular structure
The negative pressure weighing booth is composed of 3 levels of air filters, flow equalization membranes, fans, 304 stainless steel structural systems, electrical systems, automatic control systems, filter pressure detection systems, etc.
Product advantages
The box body is made of high-quality SUS304 stainless steel, and the working area is designed without dead corners, no dust accumulation, and easy to clean;
Top air supply, hepa filter efficiency ≥99.995%@0.3μm, the air cleanliness of the operating area is higher than the cleanliness of the room;
Buttons control lighting and power;
A differential pressure gauge is installed to monitor the use of the filter;
The modular design of the sampling box can be disassembled and assembled on site;
The return air orifice plate is fixed with strong magnets and is easy to disassemble and assemble;
The one-way flow pattern is good, the dust does not spread, and the dust capture effect is good;
Isolation methods include soft curtain isolation, plexiglass isolation and other methods;
The filter grade can be reasonably selected according to customer needs.
Working principle
The air in weighing booth passes through the primary filter and the medium filter, and is pressed into the static pressure box by centrifugal fan. After passing through hepa filter, the airflow is diffused to the air outlet surface and blown out, forming a vertical one-way airflow to protect the operator and prevent drug contamination. The operating area of the weighing cover exhausts 10%-15% of the circulating air and maintains a negative pressure state to avoid environmental pollution and cross-contamination of drugs.
Technical indicators
Air flow speed is 0.45m/s±20%;
Equipped with control system;
Air velocity sensor, temperature and humidity sensor are optional;
High-efficiency fan module provides clean laminar air (measured with 0.3µm particles) to meet clean room requirements with efficiency up to 99.995%;
Filter module:
Primary filter-plate filter G4;
Medium filter-bag filter F8;
Hepa filter-mini pleat gel seal filter H14;
380V power supply. (customizable)
Post time: Oct-24-2023