Liquid trough air filters, with their unique structural design and material properties, have significant advantages in the field of air purification, especially suitable for scenarios with extremely high requirements for cleanliness and sealing performance. Its core advantages are as follows: It has extremely strong sealing performance and an extremely low leakage rate This is the core advantage of the liquid tank filter. A flexible seal is formed between its frame and the installation frame through a liquid groove sealant (such as silicone gel, polyurethane glue, etc.): when the filter is embedded in the frame, the sealant will tightly fill all the gaps after being squeezed. Even if the equipment vibrates slightly or the frame deforms slightly due to temperature changes, it can still maintain a gap-free fit. Compared with traditional mechanical compression seals (which rely on hard fixation such as bolts and clips and are prone to micro-cracks due to uneven stress), the leakage rate of liquid trough seals can be reduced to less than 0.001%, almost eliminating the risk of “side leakage” and ensuring that 100% of the air entering the clean space is filtered. 2. High filtration efficiency, suitable for ultra-clean scenarios The filter media mostly adopt ultra-fine

Liquid through air filters, with their high sealing performance and high filtration efficiency (the filtration efficiency for 0.1-0.3μm particles can reach over 99.9995%), are mainly applied in scenarios with extremely high requirements for air cleanliness, especially suitable for environments where dust, microorganisms, and harmful particles need to be strictly controlled. The following are its typical application scenarios: 1. Cleanroom and precision manufacturing industries Electronics industry In the production workshops of semiconductor chips, integrated circuits, and microelectronic components (such as photolithography and packaging processes), the concentration of dust particles in the air (especially those smaller than 0.1μm) must be extremely low; otherwise, it may lead to short circuits in the chips and a decrease in yield. As a terminal filtration device, the liquid tank filter can ensure that the clean room meets Class 1 (ISO Class 1) or higher standards. Optics and Precision Instrument Manufacturing In the production environment of optical lenses, laser equipment, and precision sensors, it is necessary to prevent particles from adhering to the product surface and affecting accuracy. Liquid trough filters can effectively remove fine dust in the air and ensure product performance. 2. Biomedical and medical health fields Pharmaceutical industry The production workshops (GMP clean areas)

The classification of clean benches is mainly based on the direction of air flow and application scenarios. Among them, the direction of air flow is the most crucial classification basis, directly determining the functional characteristics and application scope of the equipment. The following are the specific classifications: I. Classification by Airflow Direction (The main classification method) Horizontal flow clean bench Airflow characteristics: Clean air is blown out from the high-efficiency filter at the back (or side) of the workbench, flows horizontally through the operation area, and is finally discharged from the front or the other side. Core advantages: The airflow directly covers the operation area, providing better cleanliness and protection for the samples. Moreover, the airflow path is short, resulting in relatively low energy consumption. Limitations: The airflow may directly blow towards the operator. If handling volatile, toxic or pathogenic substances, it can easily lead to personnel exposure, and the safety is relatively weak. Applicable scenarios: It is suitable for low-risk, non-pathogenic clean operations, such as electronic component assembly, precision instrument maintenance, and inoculation of common microorganisms (non-pathogenic bacteria), etc. 2. Vertical flow clean bench Airflow characteristics: Clean air is blown vertically downward from the high-efficiency filter at the top

The airflow velocity of a vertical flow workbench is usually adjustable, but the specific adjustment capacity depends on the design model and functional configuration of the equipment. The design for regulating the airflow velocity is mainly aimed at meeting the differentiated requirements for cleanliness and safety in various operating scenarios. The following is a detailed description: I. Feasibility of Regulating Air Flow Velocity Most mid-to-high-end models support adjustment. Mainstream vertical flow workbenches (especially those used in fields with strict environmental requirements such as biomedicine, pharmaceuticals, and electronics) are usually equipped with wind speed adjustment functions. Through the knobs, buttons, or touch interface on the control panel, the airflow speed can be adjusted within a certain range (typically 0.3-0.5m/s). This is the range of air velocity recommended by international standards for clean benches, which can be continuously or stepwise adjusted. Some basic models may have a fixed air velocity: A few economical or simple vertical flow workbenches (such as equipment temporarily used in small laboratories) may adopt a fixed air velocity design. Their fan power and air duct structure are fixed, and the air velocity cannot be adjusted, only meeting the basic cleanliness requirements. Ii. The core purpose of regulating air

The core working principle of the vertical flow workbench is to create a local high-cleanliness environment in the operation area through vertical unidirectional clean air flow, while achieving bidirectional protection for the operator, operation samples, and the external environment. Its specific workflow and key mechanisms are as follows: I. Core Mechanism: Vertical Unidirectional flow and Efficient filtration The core of the vertical flow workbench is to filter air with HEPA (High Efficiency Air Filter) or ULPA (Ultra-High Efficiency Air Filter), and through a specific air duct design, make the clean air flow through the operation area in a vertical direction (from top to bottom) to form an “air curtain barrier”, which specifically includes three key links: Air intake and primary filtration External air (or part of the circulating air) is first drawn in by the built-in fan of the workbench, and then processed by the primary filter to remove large particles of dust (such as particles with a diameter of ≥5μm) from the air, protecting the subsequent high-efficiency filter from contamination and extending its service life. High-efficiency filtration (core purification The air that has undergone initial filtration enters the HEPA/ULPA filter (with a filtration efficiency of ≥99.97%@0.3μm particles, and ULPA

A vertical flow workbench is a device that creates a local sterile and dust-free environment through clean air flow in the vertical direction. Its core function is to provide a highly clean working space for the operation area, while effectively protecting operators and the environment from the influence of contaminants during experiments or production processes. It has extensive and crucial applications in multiple fields, as follows: I. Biomedical and Life Sciences Field This is one of the core application areas of vertical flow workbenches, mainly utilizing their sterile environment to ensure the accuracy and safety of biological experiments. Cell culture: In cell biology research, whether it is the culture of animal cells, plant cells, or microbial cells, a strictly sterile environment is required. The vertical flow workbench can effectively filter bacteria, fungi, and other microorganisms in the air, prevent cell contamination, and ensure the purity of the culture system. Microbiological research: When handling microbial samples such as bacteria, viruses, and fungi, the vertical flow workbench can prevent the samples from spreading to the external environment and protect the operators from pathogenic microorganisms. It is particularly suitable for experiments such as the isolation and identification of pathogenic microorganisms. Molecular biology experiments,

The service life of high-temperature resistant filters is influenced by multiple factors and varies greatly, usually ranging from several months to several years. The core influencing factors include the usage environment, filter material characteristics, maintenance methods, etc. The following is a specific analysis: I. Core Influencing Factors Operating temperature and duration The higher the temperature, the faster the aging speed of filter materials (such as glass fiber, ceramic, and metal mesh). For instance, the lifespan of a filter that operates continuously at 300℃ may be 30% to 50% shorter than that at 150℃. Intermittent operation (such as running for 8 hours a day) has a longer lifespan than continuous operation for 24 hours because the filter material has “rest” and cooling time, reducing thermal fatigue damage. The properties of the filter medium Dust concentration and hardness: High-concentration dust (such as metallurgical and boiler flue gas) can quickly clog filter materials and shorten their lifespan. Hard particles (such as metal debris) may wear down the surface of the filter material and accelerate its damage. Corrosiveness: If the high-temperature gas contains acidic or alkaline components (such as sulfides and chlorides in chemical waste gas), it will corrode the filter material or sealing

High-temperature resistant filters are air purification devices that can maintain filtration efficiency and structural stability in high-temperature environments (typically withstanding temperatures of ≥150℃, and some special models can withstand temperatures above 300℃). Their filter materials are mostly made of high-temperature resistant materials such as glass fiber, ceramic fiber, and metal fiber, and the frames and sealing parts are also made of high-temperature resistant materials (such as stainless steel, silicone rubber, etc.). This type of filter is mainly applied in scenarios where there is high-temperature airflow and it is necessary to control particulate pollution. The following are its core application areas: 1. High-temperature production processes in industry Metallurgy and Metal processing During the processes of steelmaking, steel rolling, forging, etc., high-temperature flue gas or gas flow contains a large amount of metal dust and oxidation particles. High-temperature resistant filters can be used to purify the high-temperature gas discharged from furnaces and kilns, reduce wear on subsequent equipment (such as heat recovery devices), and at the same time lower air pollution. The purification of circulating air in metal heat treatment workshops (such as annealing and quenching) prevents high-temperature dust from adhering to the surface of workpieces and affecting product quality. Chemical engineering

Although laminar flow hoods and biosafety cabinets both fall under the category of air purification and protection equipment, they have significant differences in design purposes, airflow directions, protected objects, and application scenarios. The core difference lies in the emphasis on protection targets: Laminar flow hoods are mainly designed to “protect products/operation objects from contamination”, while biosafety cabinets are mainly designed to “protect operators, the environment and samples from cross-contamination”. The following are the specific differences: 1. Core functions and protection objectives Laminar flow hood The core function is to provide a local high-cleanliness environment, with a focus on protecting the operating objects (such as medicines, chips, food, etc.) from contamination by particles and microorganisms in the external environment. The protection direction is unidirectional protection: Only the products/materials within the operation area are purified and protected, without specifically considering the protection of the operators or the external environment. Biosafety cabinet The core function is to achieve multiple protections, with a focus on safeguarding operators, the laboratory environment, and operation samples (such as microorganisms, viruses, toxic reagents, etc.), to prevent cross-contamination among the three. The protection direction is bidirectional/three-directional protection: it not only prevents the sample from contaminating the environment and personnel,

Class A laminar flow hoods are air purification devices capable of providing A local Class A clean environment. Their core function lies in high-efficiency filtration (typically using HEPA or ULPA filters) and unidirectional airflow organization. The concentration of suspended particles in local areas is controlled at an extremely low level (meeting the Class 5 or higher standards in ISO 14644-1, corresponding to the A-level clean area requirements in GMP), and it is widely applied in fields with extremely high cleanliness requirements. The following are its main application fields: The pharmaceutical and biopharmaceutical industry This is the most core application field of Class A laminar flow hoods, which is directly related to the quality of drugs and patient safety. Sterile preparation production: such as injections (infusions, freeze-dried powder injections, small water injections), ophthalmic preparations, etc., in key operation links such as filling, sub-packaging, capping, and freeze-drying out of the box, A-class laminar flow hoods must be used to protect the products from environmental microorganisms and particle contamination. Biological product manufacturing: In the production processes of vaccines, blood products, genetic engineering drugs, etc., sensitive materials such as living cells and viruses are involved. A-level laminar flow hoods can prevent the materials from

Due to their different functional characteristics, the activated carbon adsorption cabinet and the fresh air pressurization cabinet have obvious differences in their applicable scenarios, as follows: I. Applicable Scenarios of Activated Carbon Adsorption Cabinets The core of the activated carbon adsorption cabinet is to adsorb odors and organic pollutants in the air (such as formaldehyde, VOCs, stench, etc.) through activated carbon, focusing on the purification of existing air without the need to introduce outdoor fresh air. It is suitable for the following scenarios: 1. Places with local pollutants or odors Newly renovated/refurbished Spaces: newly renovated residences, offices, children’s rooms, etc., can absorb harmful gases such as formaldehyde, benzene, and TVOC released by decoration materials, reducing the concentration of indoor pollutants. Kitchen/Dining area: For family kitchens and the back kitchens of small restaurants, it can absorb the smell of cooking fumes and food residues, reducing the spread of indoor cooking fumes. Bathroom/Pet activity area: The damp odor, pet feces, or body odor in the bathroom can be quickly improved in local air quality through activated carbon adsorption. Laboratory/small workshop: A place involving operations of chemical reagents, inks, adhesives, etc., which can adsorb volatile harmful gases (such as acetone, toluene), protecting the

Although both the fresh air booster cabinet and the activated carbon adsorption cabinet are related to air treatment, they have significant differences in core functions, working principles, and application scenarios, as follows: I. Core Functions and Design Objectives Fresh air booster cabinet The core function is to introduce and purify fresh outdoor air, while maintaining positive indoor pressure through pressurization to improve indoor ventilation and air quality. Its design objective is to address the issues of “insufficient air circulation” and “intrusion of external pollutants”, with a focus on “fresh air supply” and “air pressure control”. Activated carbon adsorption cabinet The core function is to purify the existing air in the room or specific space, removing odors and harmful gases (such as formaldehyde, VOCs, stench, etc.) in the air through the adsorption effect of activated carbon. Its design goal is to solve the problem of “existing air pollution”, with the focus on “air purification” rather than “fresh air introduction”. Ii. Working Principle Fresh air booster cabinet Fresh air is extracted from outside and passes through a filtration system (such as primary and medium-efficiency filters, with some including high-efficiency filters) to remove particulate matter, dust, pollen, etc. The filtered fresh air is