PRODUCTS
绝缘油*Insulating Oil Purifier
变压器油*Transformer Oil Purifier
透平油*Turbine Oil Purifier
润滑油*Lubricating Oil Purifier
液压油*Hydraulic Oil Purifier
抗燃油*Fire Resistant Oil Purifier
聚结分离*Coalescence Separation Oil Purifier
防爆*Explosion Proof Oil Purifier
真空*Vacuum Oil Purifier
板框式*Plate-Frame Pressure Oil Purifier
真空抽气*Vacuum Pumping Unit
附件*Accessories
Introduction to vacuum degree of vacuum pump
There are usually two methods for marking vacuum degree:
One is marked with pressure (ie: vacuum degree);
The second is to use relative pressure (ie: relative vacuum degree) to identify.
The so-called "pressure" means that the vacuum pump is connected to the detection container. After a sufficient period of continuous pumping, the pressure in the container no longer continues to decrease and maintains a certain value. At this time, the gas pressure value in the container is the pressure of the pump. If there is no gas in the container, then the pressure is zero, which is a theoretical vacuum state. In actual situations, the pressure value of the vacuum pump ranges from 0 to 101.325KPa. The pressure value needs to be measured with a pressure meter. At 20°C and altitude = 0, the initial value of the meter is 101.325KPa. In short, the air pressure identified with "theoretical vacuum" as a reference is called: "pressure" or "vacuum degree". "Relative vacuum degree" refers to the difference between the pressure of the object being measured and the atmospheric pressure at the measurement location. Use an ordinary vacuum gauge to measure. In the absence of vacuum, the initial value of the table is 0. When measuring vacuum, its value is between 0 and -101.325KPa (generally expressed as a negative number). For example, if the measured value is -30KPa, it means that the pump can pump a vacuum state that is 30KPa lower than the atmospheric pressure at the measurement location. The relative pressure values of the same pump measured at different locations may be different because the atmospheric pressure at different measurement locations is different, which is caused by different objective conditions such as altitude and temperature in different places. In short, the air pressure identified with the "atmospheric pressure at the measurement location" as a reference is called: "relative pressure" or "relative vacuum". The commonly used "vacuum degree" in the vacuum industry is also scientifically marked with pressure; it refers to "ultimate vacuum, vacuum degree, pressure" (our company is consistent with this), but "relative vacuum degree" (relative pressure, vacuum gauge) Pressure, negative pressure) Because the measurement method is simple, measuring instruments are very common, easy to buy and cheap, they are also widely used. Theoretically, the two can be converted to each other. The conversion method is as follows: relative vacuum degree = ultimate vacuum degree (pressure) - air pressure at the measurement location. For example: there is a micro vacuum pump PK4512 with an ultimate vacuum degree of 45KPa, then its relative vacuum The degree is about 45-100 = -55Kpa, which is displayed as about -0.055Mpa on a commonly used relative vacuum meter (because it is related to the local atmospheric pressure). This is why some customers buy a pump and measure it with a vacuum meter. I misunderstood that the manufacturer's parameters were not met and were far behind.
One is marked with pressure (ie: vacuum degree);
The second is to use relative pressure (ie: relative vacuum degree) to identify.
The so-called "pressure" means that the vacuum pump is connected to the detection container. After a sufficient period of continuous pumping, the pressure in the container no longer continues to decrease and maintains a certain value. At this time, the gas pressure value in the container is the pressure of the pump. If there is no gas in the container, then the pressure is zero, which is a theoretical vacuum state. In actual situations, the pressure value of the vacuum pump ranges from 0 to 101.325KPa. The pressure value needs to be measured with a pressure meter. At 20°C and altitude = 0, the initial value of the meter is 101.325KPa. In short, the air pressure identified with "theoretical vacuum" as a reference is called: "pressure" or "vacuum degree". "Relative vacuum degree" refers to the difference between the pressure of the object being measured and the atmospheric pressure at the measurement location. Use an ordinary vacuum gauge to measure. In the absence of vacuum, the initial value of the table is 0. When measuring vacuum, its value is between 0 and -101.325KPa (generally expressed as a negative number). For example, if the measured value is -30KPa, it means that the pump can pump a vacuum state that is 30KPa lower than the atmospheric pressure at the measurement location. The relative pressure values of the same pump measured at different locations may be different because the atmospheric pressure at different measurement locations is different, which is caused by different objective conditions such as altitude and temperature in different places. In short, the air pressure identified with the "atmospheric pressure at the measurement location" as a reference is called: "relative pressure" or "relative vacuum". The commonly used "vacuum degree" in the vacuum industry is also scientifically marked with pressure; it refers to "ultimate vacuum, vacuum degree, pressure" (our company is consistent with this), but "relative vacuum degree" (relative pressure, vacuum gauge) Pressure, negative pressure) Because the measurement method is simple, measuring instruments are very common, easy to buy and cheap, they are also widely used. Theoretically, the two can be converted to each other. The conversion method is as follows: relative vacuum degree = ultimate vacuum degree (pressure) - air pressure at the measurement location. For example: there is a micro vacuum pump PK4512 with an ultimate vacuum degree of 45KPa, then its relative vacuum The degree is about 45-100 = -55Kpa, which is displayed as about -0.055Mpa on a commonly used relative vacuum meter (because it is related to the local atmospheric pressure). This is why some customers buy a pump and measure it with a vacuum meter. I misunderstood that the manufacturer's parameters were not met and were far behind.