• Manual Variable Frequency System for Air Velocity

Neg Furls negative pressure weighing chambers are equipped with an advanced manual inverter system that allows the user to adjust the air velocity to suit their needs, ensuring that the air velocity in the main working area is always uniform. This system not only improves weighing stability, but also provides the user with greater flexibility.

• Excellent air distribution

The unique design of the weighing chamber allows for uniform air distribution and ensures stable air flow in the working area, which is essential for preventing cross-contamination and maintaining a clean working environment.

• Liquid Tank Design Ensures a Perfect Seal

The liquid tank design of Neg Furls negative pressure weighing chambers ensures a perfect seal, avoiding any leakage during the weighing process, thus protecting the purity of the weighed material and the safety of the operator.

• Material and structure of the chamber

The whole cabinet is made of high quality SUS304 stainless steel material, which is bent, welded and assembled into shape to ensure the equipment is sturdy and easy to clean. The electrical cabinet can be either built-in or external to suit different installation needs.

• Polymer flow equalizing membrane

The Neg Furls negative pressure weighing chamber uses a polymer equalization membrane to ensure the uniformity of air velocity on the air outlet surface, which is controlled between 5% and 10%, providing stable airflow conditions for the weighing process.

• Material selection

Negative pressure weighing chambers are usually made from high quality stainless steel, mainly 304 stainless steel, which has good corrosion resistance and is easy to clean, making it ideal for use in the pharmaceutical, biotechnology and other industries that require a highly clean environment. In addition, 316 stainless steel may also be chosen in some cases, depending on the specific application and requirements.

• Structural design

The structural design of a negative pressure weighing chamber needs to ensure that it is capable of creating a stable negative pressure environment during operation to prevent contaminant leakage and cross contamination. The design will incorporate a highly efficient filtration system including primary, secondary and high efficiency filters, as well as the necessary lighting and sterilization equipment.

• Lighting and Sterilization

Lighting in a negative pressure weighing room is often required to ensure that the operator has a clear view of the weighing and sampling process. Typically, the lighting intensity is at least 300 Lux to meet the visual requirements and ensure the accuracy of the operation. In addition, sterilization equipment, such as UV germicidal lamps or ozone generators, is often installed to ensure a clean operating environment.

• Outlet Configuration
  

The sockets in the negative pressure weighing room need to be waterproof and dustproof to cope with possible wet or dusty environments. The number of sockets is usually determined by the actual needs of the customer to ensure adequate power supply without compromising the overall cleanliness.

The working principle of the negative pressure weighing room involves a number of links, first of all, the airflow design, it adopts the form of vertical unidirectional flow airflow, the return air is first pre-filtered through the primary filter to remove the large particles of dust particles, and then through the secondary filtration of the intermediate filter to protect the high efficiency filter. Under the pressure of the centrifugal fan, the filtered air passes through the high-efficiency filter to meet the clean requirements. After that, the clean airflow is sent to the air supply box, about 90% of which passes through the even-flow air supply mesh plate to form a uniform vertical airflow, while the remaining 10% is discharged out of the equipment through the airflow regulating plate. This design ensures a stable negative pressure in the working area, preventing dust and other particles from spreading outward and protecting the external environment.

Options. 

1	Wind Speed Sensor
2	Differential Pressure Sensor
3	converter
4	touchscreens
5	PLC control
6	Polymer homogeneous membrane