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  • Thema von yanyan im Forum Neuigkeiten

    How to select vacuum pump correctly for vacuum packaging machine?

    At present, many customers in the purchase of vacuum packaging at the same time of the selection of vacuum pump is unclear, vacuum packaging machine in general with what vacuum pump?

    Vacuum pump is the core part of the vacuum packaging machine and the center of the vacuum packaging machine. It has a great influence on the packaging effect, service life and failure rate during the use of the vacuum packaging machine. How to select vacuum pump correctly for vacuum packaging machine?

    The domestic vacuum pump generally refers to the vacuum pump produced by a wholly domestic enterprise, which is characterized by low price and general quality. In the process of use, the vacuum effect is not obvious and the use performance is not stable. But the general small vacuum packaging machine can use the domestic vacuum pump. Because the vacuum chamber of the small vacuum packaging machine is small, the vacuum effect can achieve the effect of vacuumizing in a small range of space and time, so it is no problem to use the general vacuum pump.

    If some users choose medium-sized or large-scale vacuum packaging machines, small editors suggest using joint venture vacuum pumps or imported vacuum pumps. After all, as the equipment needed for production, the performance, service life and failure rate of vacuum packaging machines can directly meet the current production needs. In addition, domestic vacuum pumps are more suitable for small-scale production and large-scale production It is not recommended for mass production.

  • Thema von yanyan im Forum Neuigkeiten

    What about the leakage rate of water ring vacuum pump?

    With the development of vacuum industry, water ring vacuum pump has been widely used. In use, the most difficult problem for users is to detect the leakage rate of water ring vacuum pump. And it includes internal leakage and external leakage. The external leakage is better to detect, while the internal leakage is more difficult to handle. Here is a brief introduction to the leakage rate detection of the water ring vacuum pump:

    1. Most of the internal leakage occurred on the equipment with water-cooled jacket. No doubt was found through checking the external leakage, but there were the following phenomena: the pumping speed of the mechanical pump was obviously low, the indication value of the vacuum gauge was low, the mechanical pump oil was quickly emulsified, and the iron-based parts in the vacuum chamber were obviously rusted. If the above conditions are met, internal leakage can be basically determined. Clean the inner wall first, and then pass cooling water to see if there is any wet point. The wet point is the leakage point.

    2. Small leakage and micro leakage are difficult to check. The commonly used method is to use the ionization tube sensitive to some gases in high vacuum state to detect leakage, such as acetone or ethanol. Use a medical syringe to spray acetone or ethanol to the suspicious place. When it is sprayed to the leakage point, the pointer of the ionization meter will swing obviously. In this way, it is necessary to be patient and wait until the indicator value of the ionization meter is stable - that is, the pumping capacity and leakage rate of the vacuum unit are balanced, and then spray. It is better to repeat several times to confirm the leakage point.

    3. For larger leakage point, flame method can be used. Based on the principle that air flow can make the flame deviate, vacuum first. For example, use candle or lighter to gradually search around the suspicious point, and it will be found that the flame deviates to the leakage point, then the leakage point can be found.

    4. The stainless steel water ring vacuum pump can be selected. It has strong corrosion resistance and will not be used properly!

  • Thema von yanyan im Forum Neuigkeiten

    How to use vacuum solenoid valve in vacuum system?

    How to use vacuum solenoid valve in vacuum system Vacuum solenoid valve is a special valve for vacuum installed on mechanical vacuum pump. The valve and the pump are connected to the same power source. The opening and stopping of the pump directly control the opening and closing of the valve. How to use vacuum solenoid valve in vacuum system?

    Vacuum solenoid valve is a special vacuum valve installed on a mechanical vacuum pump. The valve and the pump are connected to the same power source. The opening and stopping of the pump directly control the opening and closing of the valve. When the pump stops working or the power supply is suddenly interrupted, the valve can automatically close the vacuum system and fill the atmosphere into the pump cavity through the air inlet of the pump to prevent the pump oil from flowing back and polluting the vacuum system. The working medium for vacuum solenoid valve is air and non-corrosive gas.

    How to use the vacuum solenoid valve in the vacuum system mainly includes the following points:

    1. Before installing the vacuum solenoid valve, you should carefully read the instruction manual of the product, check whether the product fully meets the requirements for use, be familiar with the installation points, and make preparations.
    2. During installation, the coil of the vacuum solenoid valve is upward and maintains a vertical position. The arrow or mark on the ZCA vacuum solenoid valve should be consistent with the flow direction of the pipeline.

    3. Ordinary vacuum solenoid valves should not be used in flammable and explosive dangerous places.

    4. When the vacuum solenoid valve fails, in order to isolate the ZCA vacuum solenoid valve in time and ensure the normal operation of the system, it is best to install a bypass device.

    5. Do not install the vacuum solenoid valve in the low recess of the pipeline, so as to avoid steam condensate, impurities and other deposits in the valve and hinder the action.

    6. In the case of insufficient pipeline rigidity, it is recommended to fix the front and rear pipes of the vacuum solenoid valve with a bracket to prevent vibration caused by the ZCA vacuum solenoid valve during operation.

    7. Before taking over, fully flush the pipeline with a pressure of 0.3MPa to completely remove the metal powder sealing material residues and rust in the pipeline; the working medium of the vacuum solenoid valve should be clean and free of particles; impurities, it is recommended to install a filter in front of the valve. Install steam traps in the steam line; dirt and filters on the inner surface of the inlet solenoid valve must be cleaned regularly.

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