In the chemical and pharmaceutical application of rotary vane vacuum pumps _

at present, the chemical and pharmaceutical process of vacuum technology. For the chemical and pharmaceutical process application usually is not easy to choose the appropriate vacuum technology. First of all, the vacuum system must provide the required water pump speed under working pressure, to ensure that the vacuum time required. Second, it is not sensitive to process gas, must satisfy the CIP ( In situ cleaning) All the requirements of clean and gas recovery. In addition, the stability and the economic efficiency in sure which one to use vacuum technology also play an important role. In this article, we describe the chemical and pharmaceutical processing technology in one of the most commonly used vacuum technology, namely the rotary-vane vacuum water pump are in the process of chemical and pharmaceutical applications.

compared with the other on the basis of the principle of rotary vane vacuum pumps, imported rotary vane vacuum pump has three obvious advantages:

1. Two compression level stack and connect each other, so that in the first stage of process gas preliminary compression, later in the second stage of secondary compression, so as to realize the limits of low pressure.

2。 Vacuum pump oil lubrication, that would mean a certain amount of working fluid, oil or other compatible liquids into the compression chamber. Compared with other rotary vane vacuum pumps used lubricating oil cycle.

3。 Rotary vane vacuum pump with water cooling, can be operating temperature control to a specific range.

rotary vane pump of the rotary vane of the rotor, pump room and surrounded by two end cover crescent-shaped space is divided into three parts A, B and C. When the rotor rotates along the direction of the arrow, the space with the suction in A volume increase gradually and in the suction process. Connect to vent space C volume decreases, and in the exhaust process. Center space, the size of B has decreased gradually and in the compression process. Because of the space of A volume increase gradually, I. e. , inflation) , the gas pressure is reduced, and the external gas pressure at the entrance of water pump is stronger than the pressure in the space of A, thus in gas. When space is A from the suction, namely is separated from the position space B, gas begins to be compressed, volume decreases, finally connect to vent. When compressed gas than exhaust pressure, exhaust valve be pushed away, compressed gas, gas emissions to the atmosphere through the fuel tank of oil. The continuous operation of the pump to realize the purpose of continuous pumping. If the discharge gas passage through the air and move to another stage ( Low vacuum level) Away, it is low vacuum stage, and then be low vacuum stage compression side by side in the atmosphere, that make up the two - Stage pump. At this point, the total compression ratio by two stages, thus increasing the limit vacuum.

rotary vane vacuum pump: the advantages of high vacuum

very durable and reliable

easy maintenance

is very suitable for conveying acid vapour and monomer or other vacuum technology may cause polymerization products

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