• Double Negative Pressure

Neg Furls negative pressure weighing chambers are designed with a double layer of negative pressure, which prevents the leakage of internal contaminants and ensures a safe operating environment. The negative pressure zone in the center of the double layer structure isolates the chamber from the outside environment and prevents the spread of contaminants, thus protecting the operator and the environment.

• Unique flow equalization design in the main working area

The Neg Furls Negative Pressure Weighing Chamber's main working area has a unique equalized flow design that ensures that dust and reagents are not spilled or cross contaminated during weighing and dispensing in the working area. This design not only prevents inhalation hazards of dust and reagents to human body, but also avoids cross contamination and protects the safety of indoor personnel.

• Hundred-level vertical laminar flow protection

The weighing operation area of the Neg Furls Negative Pressure Weighing Chamber is protected by Class 100 Vertical Laminar Flow ISO 6 (NF, EN, ISO0014644-1). This level of protection means that the air in the operating area is clean enough for high-precision weighing and complies with the cleanliness standards of the International Organization for Standardization.

• Superior Air Distribution Performance

Neg Furls Negative Pressure Weighing Chambers offer excellent air distribution, with a well-designed air supply system and high efficiency filters ensuring that the air is evenly distributed throughout the working area, providing a stable and continuous flow of clean air.

• The air velocity is automatically constant or stepwise adjustable.

Neg Furls Negative Pressure Weighing Chambers support automatic constant or stepwise adjustment of air velocity, which can be adjusted according to the actual needs, to ensure that the airflow in the operating environment is always in an optimal condition, and to meet the requirements of different weighing processes.

• Material Selection

Negative pressure weighing chambers are usually made of corrosion-resistant, easy-to-clean materials to meet the special requirements of places such as pharmaceuticals, microbiological research and scientific experiments. Most commonly, 304 stainless steel is used as the main material, which is able to withstand a wide range of chemicals due to its resistance to acids, alkalis and high temperatures, as well as being easy to clean and sterilize on a daily basis. In some specific application scenarios, a higher grade of 316 stainless steel may also be selected to meet higher corrosion resistance requirements.

• Structural Design

The structural design of a negative pressure weighing chamber is designed to provide a stable and uniform negative pressure environment, which typically involves components including, but not limited to, primary filters, intermediate filters, high-efficiency filters, equalization membranes, fans, PLC control systems, and more. These components work together to ensure orderly air flow and prevent contaminant spillage while maintaining the cleanliness of the operating area.

• Working Principle

The core working principle of the Negative Pressure Weighing Chamber is to realize the precise regulation of air flow in the working area by means of a high-efficiency filtration system combined with frequency conversion control technology. Primary filters are responsible for intercepting larger particles, intermediate filters further remove smaller particles, and high efficiency filters are used to intercept even finer particles to ensure the cleanliness of the air. Even flow membrane is used to ensure the uniformity of air supply and avoid weighing errors caused by uneven airflow.

• Application Scenarios

Negative pressure weighing chambers are particularly important in the pharmaceutical industry, where accurate weighing is not only related to product quality, but also to operator safety. For example, when weighing APIs, a negative pressure weighing chamber prevents dust from flying, reduces respiratory irritation to the operator, and avoids the risk of cross contamination.

The heart of the Negative Pressure Weighing Chamber lies in its unique airflow design, which creates a stable negative pressure environment and ensures the purity of the air through a highly efficient filtration system. Specifically, the air is first pre-filtered by primary and intermediate filters to remove larger particles of dust, and then passes through a high-efficiency filter that further removes fine dust and microorganisms to achieve the desired level of cleanliness.

Options. 

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