Sewage pump manufacturer: water ring vacuum pump in Need Zhennai water ring vacuum pump (referred to as water ring pumps) is a rough vacuum pump, it can get the ultimate vacuum of 2000 ~ 4000Pa, atmospheric jet series of up to 270 ~ 670Pa. It can also be used as the water ring pump compressors, called water ring compressor, low-pressure compressor belonging, the pressure in the range of 1 ~ 2 × 105Pa gauge pressure. Originally used as a water pump self-priming pump, then gradually used in petroleum, chemical, machinery, mining, light industry, medicine and food, and many other industrial sectors. In many processes in industrial production, such as vacuum filtration, vacuum water, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum resurgence and vacuum degassing, water ring pumps are widely used. Due to the rapid development of technology vacuum applications, the water ring vacuum pump crude in access it has been valued by the people. As the water ring pumps gas compression is isothermal, it can be exhausting flammable, explosive gases, but can also dust extraction, water gas, therefore, the water ring pumps used increasingly. Equipped with the right amount of water in the pump as the working fluid. When clockwise rotation direction of the impeller, the impeller being thrown around the water, due to the centrifugal force, the water forms a closed ring shape determined by the pump chamber and other similar thickness. The upper portion of the surface water ring coincided with the impeller hub tangent to the lower part of water just touches the surface of the ring and the blade tip (actually leaves in the water ring for a certain insertion depth). This time between the impeller hub to form a water ring and crescent space, and the space has been divided into an equal number of impeller blades of several small chambers. If the upper part of the impeller 0 ° as a starting point, then the volume of the impeller rotating by 180 ° the small chamber from small to large, and the end surface of the intake port connected, this time the gas is inhaled, when the suction end of the small chamber then cut off the intake port; when the impeller continues to rotate, the small chamber from big to small, so that the gas is compressed; when the small chamber in communication with the exhaust port, the gas will be discharged pump. In summary, the water pump by changes in volume of the chamber is to achieve suction, compression and exhaust, so it belongs to the variable displacement pump. Water ring pumps and other types of mechanical vacuum pump has the following advantages: simple structure, less precision, easy to process. Compact structure, high number of revolutions of the pump, and can be directly connected with the motor without reduction gear transmission. Therefore, the structure of small size, you can obtain a large displacement, the area is also small. Compressed gas is essentially isothermal, ie compressed gas process temperature changes little. Since the pump chamber without the metal friction surface, no need for the pump for lubrication, and wear small. Seal between the rotating and stationary parts can be done directly from the seal. Breathing evenly, smooth and reliable, simple operation, easy maintenance. Water pump also has its disadvantages: low efficiency, generally about 30%, preferably up to 50%. The degree of vacuum is low, not only because of limited structure, more important to limit saturated vapor pressure of the working fluid by. Water as the working fluid, ultimate pressure can reach 2000 ~ 4000Pa. Oil as the working fluid, up to 130Pa. In short, the water ring pumps gas compression is isothermal, it can be exhausting flammable and explosive gases. In the absence of the exhaust valve and the friction surface, it can be exhausting gases other with dust, gas condensate and gas-water mixture. With these outstanding features, despite its low efficiency, it is still widely used.