Use of negative pressure weighing hood

Negative Pressure Weighing Booth/Negative pressure weighing room/Negative pressure weighing hood

Weighing room is a specialized local purification equipment used in places such as pharmaceuticals, microbiology research, and scientific experimentsIt provides a vertical unidirectional airflow, with some clean air circulating in the workspace and some discharged to nearby areas, creating negative pressure in the workspace to prevent cross contamination and ensure a high cleanliness environment.

Weighing and packaging dust and reagents in the equipment can control the overflow and upward movement of dust and reagents, prevent the inhalation hazards of dust and reagents to the human body, and also avoid cross contamination of dust and reagents, protecting the external environment and the safety of indoor personnel.

The weighing operation area is composed of a thousand level vertical laminar flowISO 6（NF，EN，ISO14644-1） 保护。

OneProduct features:

1 By sinking and lowering the low negative pressure airflow, a clean and sterile local environment is created in the operating area to avoid cross contamination between different drugs

2 Effectively control the overflow and upward movement of dust and reagents, prevent the inhalation hazards 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

3 Primary, medium, and high-efficiency filters are used for three-stage filtration, and the liquid tank high-efficiency filter meets the requirementsDOPorPAOThe testing requirements

4 Polymer uniform flow film significantly improves the uniformity of air outlet

2、 Structural features

This equipment is assembled from several parts, including the workspace, return air box, fan box, outlet box, and outer box. The control panel is located on the front of the internal workspace of the device and adopts a touch sensitive designThe LED control panel can control the start and stop of the fan, adjust the fan operating conditions, and adjust the required wind speed in the work area (after the equipment is installed and used, specialized personnel need to adjust the operating conditions). There is a differential pressure gauge next to it, which tests the resistance of the filter. There is also an exhaust adjustment plate inside the air supply box, which can adjust the exhaust volume of the equipment within a reasonable range (after the equipment is installed in place, it should be tested by professionals, please do not adjust it without authorization)

threeWorking principle

This device adopts a vertical unidirectional airflow formThe return air needs to be pre filtered through a primary filter to remove large dust particles from the airflow,. After pre-treatment, the air is further filtered through a medium efficiency filter to fully protect the high-efficiency filter. Under the pressure provided by the centrifugal fan, it is filtered through a high-efficiency filter to meet the cleanliness requirements. The clean airflow is sent into the air supply box, with 90% passing through the uniform flow air mesh plate to form a uniform vertical air supply airflow, and 10% passing through the air volume adjustment plate to be discharged from the equipment. All airflows are processed by high-efficiency filters, so there is no residual dust in the air supply and exhaust, avoiding secondary pollution. Due to the formation of a stable unidirectional flow in the work area, the dust emitted in this area will be captured by the primary and medium efficiency filters under the influence of the unidirectional airflow. The equipment is equipped with a 10% exhaust system, which creates a negative pressure relative to the external environment, ensuring to some extent that dust in this area will not spread outside and protect the external environment.

ZJSJ-1000TheZJSJ-1600TheZJSJ-1800Technical parameters of negative pressure weighing room