1, circulating water pump working principle: circulating water pump working principle is: the use of circulating water as a working fluid, the use of jet vacuum principle designed to provide chemical laboratory vacuum conditions, and to the reactor to provide circulating cooling water . 2. Circulating water type vacuum pump Usage: Circulating water type vacuum pump is widely used in the fields of evaporation, distillation, crystallization, filtration, decompression, sublimation and other operations. It is an ideal equipment for laboratories in universities, pharmaceuticals and chemicals, food processing and other fields. The diverse needs of the general public in different work environments. The following is the collection of the network on the circulating water pump prone to problems in the use of the process and the corresponding solution, I hope everyone will help! 3, circulating water pump Frequently Asked Questions: Question 1: Circulating water pump in the water tank if the temperature is too high for a long time, will have an impact on the pump, there will be no danger? User response: high temperature will be a lot of vaporization in the pump body, so that the efficiency of the circulating water pump down, the vacuum can not fight down. So water temperature must be controlled. but! In general, as long as the ambient temperature does not exceed the pump's working environment requirements, not water shortage. There will be no problem, calculated at manufacturing time. Do not worry to check the product manual. Question 2: Newly purchased circulating water vacuum pump, not long after, the tank wall always appears a lot of yellow oily, I do not know how else? User replied: A, your pumping gas is oily? Inhalation pump is mixed with water. B, it is caused by gas, no problem, rest assured. C, has nothing to do with the water ring pump, and pumping media related. Question 3: Circulating water vacuum pump out of the pump what is the reason? It is not the reason why the rubber tube is pulled after the first switch is turned on and off, but the water is drawn out during the suction filtration. User response: The inlet of the working fluid inlet valve smaller point on the line, because: because the water is too large, causing the water ring is too thick, so that part of the water discharged from the exhaust port .Question 4: circulating water pump After filtration is completed, shut down, will inject a large amount of water from the hose to the suction flask? Urgently seeking reasons, thank you! User response: Because just in the process of work, the entire pipeline system is in a vacuum state, you will make a closed loop water back. Generally have to pull the exhaust pipe and then off the switch. Question 5: Circulating water vacuum pump less displacement, the degree of vacuum does not go, what is the reason? User response: Hello, please check carefully around the pump seal leaks, pipe connections, etc. If these are normal intact, it is necessary to check the pump's own problems, the pump motor is reversed, the valve has Not all open, vacuum pump work is not less than the required degree of vacuum work, and so on, I wish you good luck. Question 6: What is the reason for the decrease of vacuum degree of circulating water vacuum pump, please tell me yo User replied: Piston leakage or other places leak. Question 7: The mechanical seal of circulating water vacuum pump adopts internal circulation, but liquid is thrown to the surrounding by centrifugal force at work, the shaft has no water at all, how to cool down? User replied: liquid under the action of centrifugal force to form a liquid ring, water ring pump shaft and mechanical seal gap, where the water is part of the working fluid (from the working fluid into the mouth of the water added), the water on the shaft and seal Between the formation of a layer of water film, cooling, sealing effect. This article is published by the Asia Fluid Network Editor, please indicate Asia Fluid Network; Promotion Service Hotline :, QQ :; Editor: Xu Hui Jing; Imported vacuum pump manufacturers: Germany Leybold vacuum pump