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There are usually two methods for identifying the vacuum degree of a universal vacuum drying oven
Date: 2023-02-23Read: 6
The universal vacuum drying oven is designed specifically for drying heat sensitive, easily decomposable, and oxidizable substances. During operation, it can maintain a certain degree of vacuum in the working chamber and can be filled with inert gas. Especially for some complex components, it can also be quickly dried. The intelligent digital temperature regulator is used for temperature setting, display, and control.
At present, the universal vacuum drying oven is widely used in research and application fields such as biochemistry, chemical pharmaceuticals, medical and health care, agricultural research, environmental protection, etc., for powder drying, baking, and disinfection and sterilization of various glass containers. It is particularly suitable for fast and efficient drying of heat sensitive, easily decomposable, easily oxidizable substances and complex components.
There are usually two methods for identifying vacuum degree:
1. Absolute pressure "and" absolute vacuum degree "refer to the theoretical vacuum; How high is the pressure label; In practical situations, the absolute pressure value of a vacuum pump ranges from 0 to 101. Between 325KPa. The absolute pressure value needs to be measured using an absolute pressure gauge. At a temperature of 20 ℃ and an altitude of 0, the initial value of the absolute vacuum gauge used to measure vacuum degree is 101. 325KPa。 That is, one standard atmospheric pressure
2. Use relative pressure and relative vacuum degree to indicate. Relative vacuum degree "refers to the difference between the pressure of the measured object and the atmospheric pressure at the measurement location. Measure with a regular vacuum gauge. In the absence of vacuum, i.e. at atmospheric pressure, the initial value of the gauge is 0, and when measuring vacuum, its value ranges from 0 to -101. 325KPa is generally represented by negative numbers. The vacuum degree commonly used in the international vacuum industry is also scientifically indicated by absolute pressure; Refers to extreme vacuum, absolute vacuum degree, and absolute pressure, but relative vacuum degree, relative pressure, vacuum gauge pressure, and negative pressure are also widely used due to their simple measurement methods, widespread availability of measuring instruments, ease of purchase, and low cost.