Use and Precautions of Diaphragm Vacuum Filtration Pump

Laboratory vacuum filtration equipment is specially designed for laboratory workers to maintain solid-liquid separation of liquid samples.

The anti-corrosion diaphragm vacuum pump is suitable for the treatment of corrosive gases in chemical, pharmaceutical, petrochemical, and other industries, such as suction filtration, vacuum distillation, and rotary evaporation, vacuum concentration, centrifugal concentration, solid phase extraction, etc. This instrument has excellent chemical corrosion resistance. The contact parts are made of PTFE-polytetrafluoroethylene. It not only has good resistance to chemical corrosive gases from the air inlet to the air outlet but also has good resistance to condensation. The liquid is well tolerated. The pumping chamber and the chamber where the driving parts are located are sealed and separated to ensure the service life of the mechanical parts. In addition, the diaphragm pump is an oil-free pump, which reduces a lot of maintenance work compared with the oil pump. Compared with the water pump, the diaphragm pump saves a lot of water resources and compared with the rotary vane pump, it does not produce polluted waste pump oil.


Main features of the anti-corrosion diaphragm vacuum pump

1. Adopt overheating protection design. If the temperature of the body is too high, it will automatically shut down. When the temperature returns to normal, it will automatically start to work to ensure the stability and safety of the system;
2. Unique structural design, the noise is less than 50dB;
3. This product is a vacuum filtration device, which cleverly combines all the components required for vacuum filtration on one body, saves space, and is easy to operate. The built-in piston vacuum pump is an oil-free vacuum pump with low noise and no maintenance;
4. Anti-corrosion diaphragm vacuum pump, all parts in contact with gas are made of PTFE material, suitable for the treatment of corrosive gases in chemical, pharmaceutical, petrochemical, and other industries, such as SPE, suction filtration, rotary evaporation, vacuum distillation, and concentration and so on;
5. The anti-corrosion vacuum filtration system is suitable for the treatment of corrosive samples in chemical, pharmaceutical, petrochemical, and other industries. All parts in contact with gas are covered with PTFE, which can resist the corrosion of acid, alkali, and organic gas;
6. Customers can also choose a corrosion-resistant vacuum pressure filter to prevent solid impurities from entering the pump cavity, and can also adjust the appropriate pressure;
7. A variety of filter accessories are optional, and customers can freely combine them according to their needs.

A diaphragm vacuum filtration pump is commonly used in laboratories for various filtration processes, such as vacuum filtration, rotary evaporation, and gel electrophoresis. It provides a convenient and efficient way to create a vacuum for filtrations by utilizing a diaphragm to generate suction. Here are the typical uses and precautions associated with a diaphragm vacuum filtration pump:

Uses of Diaphragm Vacuum Filtration Pump:

  1. Vacuum Filtration: The primary use of a diaphragm vacuum pump is for vacuum filtration. It helps in separating solids from liquids by creating a pressure differential that draws the liquid through a filter paper or membrane while leaving the solid particles behind.
  2. Rotary Evaporation: Diaphragm vacuum pumps are suitable for use in rotary evaporation setups where solvents are evaporated under vacuum, commonly employed in chemical laboratories for concentration and purification of samples.
  3. Gel Electrophoresis: In gel electrophoresis applications, a diaphragm vacuum pump can be used for the drying of gels after electrophoresis by applying a vacuum to remove excess water.
  4. Solid-Phase Extraction: Diaphragm vacuum pumps are employed in solid-phase extraction (SPE) processes, which involve the separation and purification of analytes from complex sample matrices.
  5. Filtration of Biological Samples: Laboratories use diaphragm vacuum pumps for the filtration of biological samples, such as cell culture media or solutions, to remove particulate matter and achieve sterile filtration.
  6. Desiccation: These pumps can be used for desiccation processes, where a vacuum is applied to remove moisture from samples or materials.
  7. Chemical Synthesis: Diaphragm vacuum pumps are utilized in chemical synthesis processes where a vacuum is required for specific reactions or to remove by-products.

Precautions for Diaphragm Vacuum Filtration Pump:

  1. Chemical Compatibility: Ensure that the diaphragm vacuum pump is compatible with the chemicals and solvents used in the filtration process. Some chemicals may be corrosive or damaging to certain pump materials.
  2. Use of Suitable Tubing and Filters: Choose compatible tubing and filters for the vacuum system. The tubing and filters should be resistant to the chemicals and substances being filtered to prevent damage or contamination.
  3. Regular Maintenance: Perform regular maintenance according to the manufacturer’s guidelines. This may include checking and replacing diaphragms, cleaning filters, and ensuring proper lubrication.
  4. Emptying Waste Containers: Regularly empty waste containers connected to the vacuum pump to prevent overfilling, which can lead to decreased pump performance.
  5. Avoid Running Dry: Avoid running the diaphragm vacuum pump without a load or in a dry condition, as this can damage the pump. Ensure there is sufficient liquid in the filtration setup.
  6. Ventilation: Use the vacuum pump in a well-ventilated area to prevent the buildup of fumes. Some chemicals used in laboratories may produce fumes that need to be properly ventilated.
  7. Monitoring Vacuum Levels: Monitor and adjust vacuum levels based on the requirements of the filtration process. Excessive vacuum can lead to filter paper damage or sample loss.
  8. Safety Precautions: Adhere to general laboratory safety precautions, including the use of personal protective equipment (PPE) and following guidelines for handling chemicals and biological samples.

By following these precautions, laboratory personnel can ensure the safe and effective use of diaphragm vacuum filtration pumps in various applications. It’s essential to refer to the manufacturer’s instructions and guidelines specific to the model of the vacuum pump being used.

Use notes of anti-corrosion diaphragm vacuum pump

During the use of the anti-corrosion diaphragm vacuum pump, the following operations should be avoided:

1. Check the voltage on the data plate of the pump, if it is in line with the local voltage.
2. Please use the pump under clean, dust-free, and draughty circumstances with a temperature lower than 40℃.
3. The pump must be operated on a horizontal table.
4. Please turn off the power before installing and dismantling the silicone tube.
5. Do not move, hit, or lean the pump when it is in operation.
6. The filtration operation is controlled many times. After each filtration operation, the conical flask is not cleaned, resulting in too much-accumulated filtrate in the conical flask, and the liquid level exceeds the suction port.
7. The particle size of impurities contained in the filtered liquid is too large. The diaphragm vacuum pump has an advanced design, high working efficiency, and long service life. It is mainly used in medical and pharmaceutical product analysis, fine chemicals, biochemical pharmaceuticals, food inspection, public security criminal investigation technology, and other fields. Solvent filter vacuum filtration devices are mainly used in high-performance liquid chromatography, mobile phase filtration, particulate matter analysis, and microbial contamination detection. They are standard equipment in chemical laboratories. (In this case, it is recommended to connect a transition bottle in series between the filter unit and the vacuum pump (industry: machinery manufacturing) to avoid sucking back.)
8. The filter medium contains high-temperature liquid-vapor or volatile substances. If the above situation occurs, first turn off the power immediately, unplug the air inlet hose, and then do a cleaning and inspection of the inside of the pump body, dry all parts, assemble them, and then use them again.

Operation Procedures of diaphragm vacuum pump

1. Put the glass filter flask on the stainless steel workbench, and insert the silica gel plug of the funnel base into the filter flask.
2. Use the pipeline to connect the pump’s connector with the filter flask.
3. Lay the filter membrane on the funnel base, cover the filter flask, and rotate gently.
4. Connect the yellow bleeder tube with the bottom drain outlet of the filter flask, and use the fixture to clamp the bleeder tube.
5. The specific operation procedures of a Diaphragm Vacuum Pump may vary slightly depending on the model and manufacturer. However, here is a general outline of the steps involved in operating a diaphragm vacuum pump:
6. Inspect the Pump: Before starting, visually inspect the pump for any visible damage or abnormalities. Check for loose connections, damaged tubing, or worn-out parts.
7. Prepare the Setup: Set up the filtration apparatus or vacuum system according to your specific application. This typically involves connecting the pump to the appropriate tubing, fittings, and the desired collection vessel or filtration setup.
8. Power Connection: Ensure the pump is connected to a stable power source that meets the electrical requirements specified by the manufacturer. Use the appropriate voltage and plug the pump into a grounded outlet.
9. Turn On the Pump: Switch on the power button or control switch to start the diaphragm vacuum pump. Some pumps may have additional control settings or knobs to adjust the vacuum level or flow rate. Refer to the manufacturer’s instructions for any specific operational controls.
10. Adjust the Vacuum Level: If necessary, adjust the vacuum level using a vacuum regulator or control valve. This allows you to control the suction force applied by the pump. Follow the specific instructions provided by the manufacturer to set the desired vacuum level.
11. Start Filtration: Once the vacuum pump is running and the desired vacuum level is set, start the filtration process. Apply the vacuum by connecting the tubing to the filtration flask or apparatus. Ensure a proper seal to maintain the vacuum.
12. Monitor Filtration: Throughout the filtration process, monitor the progress and ensure that the vacuum is maintained. Pay attention to the flow rate, any changes in pressure, or potential clogging of the filter. Adjust the vacuum level or flow rate if necessary to optimize filtration efficiency.
13. Complete Filtration: Once the filtration is complete, switch off the vacuum pump. Disconnect the tubing from the filtration setup carefully to avoid any spills or contamination. Handle the collected filtrate or residue according to proper waste disposal procedures.
14. Maintenance and Storage: After use, follow the manufacturer’s instructions for the maintenance and storage of the diaphragm vacuum pump. This may include cleaning, lubrication, and proper storage in a clean and dry environment.
15. It is important to refer to the specific operating instructions provided by the manufacturer of your diaphragm vacuum pump. Follow their guidelines, recommendations, and any safety precautions to ensure the safe and efficient operation of the pump.