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yibocommunal
Jul 25, 2022
In Pet Forum
1、 Overview of shaft seal free centrifugal pump Shaft seal free centrifugal pump is also known as packing free centrifugal pump. It is usually a vertical canned motor or a horizontal canned motor, which is driven by a wet winding motor without a shielding pad. In this case, the pump and motor share a pressure pump housing, and there is a heat shield between the pump parts and the motor parts. The heat shield can be active or passive. The allowable medium temperature is as high as 420 ℃ 2、 Characteristics of shaft seal free centrifugal pump The bearing is lubricated by discharging medium. In practice, there is no limit to the system pressure, because the total leakage rate is slightly higher than the mark, so it can be used for dangerous media or valuable media. 3、 Special form of shaft seal free centrifugal pump The special form of shaft seal free centrifugal pump is designed according to the application purpose. ·Special impellers for liquid and gas mixtures or suspended solids ·Sealing system specially used for nuclear reactor technology or sealing system with protective gas gasket ·Heating device specially used for quick condensing fluid, such as hot water circulating pump ·Protective cover with abrasion protection vacuum unit of cooling cycle process Liquid ring vacuum pump Liquid ring vacuum pump manufacturer
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yibocommunal
Jul 21, 2022
In Pet Forum
The common self-priming pump refers to the external mixing suction and filtration self-priming pump. According to the rotation of the centrifugal impeller, the liquid flows into the volute, and then the pump shell generates a vacuum pump. In that way, the product of the self-priming pump will start, suck the liquid in from the inlet, and transport the liquid out according to the path of the impeller. It is the principle of the self-priming pump. An obvious feature of self-priming pump different from centrifugal pump is that it does not need to inject water in the case of application. However, in the case of a single application, you must remember to inject water into the pump cavity. Because the pump shell itself does not store liquid, if you do not inject water in the case of a single application, the pump will rotate at a high speed, which will not only prevent the liquid from being sucked up, but also continue to burn the mechanical seal and other parts of the pump shell due to the high rotation speed. Therefore, you must pay attention to this. So should the self-priming pump be installed with a bottom valve 01 If the bottom valve is not installed What is the situation? Generally speaking, there is no need to install the bottom valve. Generally, the inlet of the self-priming pump is equipped with a check valve, which is often referred to as this product, so after the pump is terminated, the liquid in the pump body cannot flow back to the original pool and be stored in the pump body, so there is no need to add liquid in the case of the second application, 02 If the bottom valve is installed What about the situation? If the bottom valve is refitted, the actual effect will be better, because sometimes if this product is destroyed, there is also a bottom valve as a guarantee, which is not easy to appear high speed, and after refitting the bottom valve, it will also reasonably ensure the reasonable suction lift of the pump! Another special case, but if there is too much difference in the suction height width ratio, or the suction pipe is large, and the volume exceeds the liquid storage in the self-priming pump cavity, everything cannot work normally. At this time, it is necessary to refit the bottom valve to ensure the rapid safety of natural suction. What is the liquid viscosity of acid resistant vacuum pump? Liquid ring vacuum pump Liquid ring vacuum pump manufacturer
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