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Analysis of the specific working process of laboratory diaphragm vacuum pump
Date: 2025-11-16Read: 2
Laboratory diaphragm vacuum pump is a vacuum equipment widely used in laboratories, chemistry, pharmaceuticals, environmental protection and other fields. Compared with traditional mechanical pumps, diaphragm vacuum pumps adopt a diaphragm structure, which can provide vacuum degree without contact with gas, thus avoiding liquid or gas pollution of the pump body, especially suitable for handling corrosive gases, volatile solvents, etc.
Laboratory diaphragm vacuum pumpThe specific working process:
1. Inhalation process: The motor drives the diaphragm to make reciprocating motion, and the reciprocating motion of the diaphragm in the pump body will increase the volume of the pump chamber, forming negative pressure. After negative pressure is generated, external gas is drawn into the pump chamber through the intake valve.
2. Compression process: When the diaphragm continues to move in the opposite direction, the volume of the pump chamber decreases, and the gas is compressed, thereby increasing the pressure of the gas.
3. Exhaust process: As the diaphragm continues to move, the compressed gas is discharged from the pump body through the exhaust valve, completing one working cycle.
Due to the lack of direct contact between the diaphragm and gas, it can prevent harmful gases, steam, solvents, etc. from entering the pump, effectively avoiding corrosion and pollution of the pump.
Job characteristics:
1. Oil free design: Adopting an oil-free design, it does not require lubricating oil, making it suitable for handling corrosive, volatile, or toxic gases. Traditional mechanical pumps typically require oil to lubricate moving parts, but oil can easily contaminate gases, while diaphragm vacuum pumps avoid this problem.
2. Low noise: Compared with some mechanical vacuum pumps, it has lower noise and is suitable for use in laboratories or factories that require a quiet environment. Its working principle does not involve high-speed rotating metal parts, reducing mechanical noise.
3. Adjustable vacuum degree: The vacuum degree can be adjusted by adjusting the working rate of the pump to meet different experimental or production needs. Generally speaking, the vacuum degree of a diaphragm vacuum pump can reach 20-1000mbar (millibars), depending on the pump model and design.
4. Simple structure and easy maintenance: The structure is relatively simple, and disassembly and maintenance are also relatively convenient. Due to the absence of complex mechanical components, the pump body has less wear and has a longer lifespan, resulting in fewer malfunctions during use.
5. High corrosion resistance: Due to the fact that the diaphragm does not come into contact with gases, it has strong corrosion resistance and is suitable for the extraction of various chemicals and solvents in the laboratory, especially in environments with highly corrosive gases, exhibiting good durability.
6. Low flow and high precision: Suitable for low flow and high-precision vacuum extraction, it can meet some special application needs in the laboratory.
Application areas of laboratory diaphragm vacuum pumps:
1. Chemical experiments: commonly used in processes such as gas emissions, solvent recovery, vacuum evaporation, and gas extraction in chemical reactions, especially suitable for handling toxic, harmful, and corrosive gases.
2. Pharmaceutical industry: In the purification, concentration, distribution, and packaging processes of drugs, a stable vacuum environment can be provided to ensure precise control of the pharmaceutical process, especially when dealing with volatile solvents.
3. Food industry: Used for vacuum packaging, degassing, sterilization, concentration and other processes in food processing, it can effectively reduce oxidation in food, maintain the freshness and nutritional content of food.
4. Environmental protection: It can be used for waste gas treatment, environmental monitoring and other work, especially in the process of extracting and discharging toxic and harmful gases, which can reduce pollution to the environment.
5. Laboratory gas analysis: In analytical experiments, especially in gas analysis instruments, it is often used to extract gas samples and maintain the required low-pressure environment.
6. Vacuum filters and concentrators: They can provide a stable vacuum environment and are suitable for some vacuum concentration and filtration equipment, especially in the concentration process of liquids or solids.