The clearance between the rotors of Roots vacuum pump must be guaranteed to achieve higher vacuum. Therefore, the Roots vacuum pump must be equipped with a front-stage pump when it is used. When the pressure in the system is pumped to a certain range by the front-stage pump, the Roots vacuum pump can be started again, so that the overload of the Roots vacuum pump can be avoided. Water (liquid) ring vacuum pump, rotary vane vacuum pump, sliding valve vacuum pump, reciprocating vacuum pump and other vacuum pumps can be used in the front stage.
Roots Water Ring Vacuum Unit Introduced Roots Water Ring Vacuum Unit is a series of roots pump as the main pump and water ring pump as the front pump. Roots water-ring vacuum unit is more advantageous than other vacuum pumps in choosing water-ring pump as the front pump. It overcomes the limitation pressure difference of single water-ring pump (the unit’s limitation pressure is much higher than that of water-ring pump), and has the disadvantage of low pumping rate under a certain pressure. At the same time, it retains the advantages of Roots pump that can work quickly and has a larger pumping rate. Especially, it can suit to extract a large amount of condensable steam, especially when the capacity of gas-ballast oil-seal mechanical vacuum pump to remove condensable steam is not enough, or the solvent used can deteriorate the performance of the pump oil, or when the vacuum system does not allow oil pollution. When equipped with explosion-proof motors and electrical appliances and in compliance with the corresponding safety rules, flammable and explosive gases can also be removed. Therefore, Roots pump-water ring pump device is widely used in chemical vacuum distillation, vacuum evaporation, dehydration crystallization, food freeze drying, medical vacuum drying, textile polyester chip, vacuum pump system high vacuum Roots vacuum pump (mechanical booster pump), etc. field. High-altitude simulation tests such as stems cannot directly discharge the atmosphere, such as direct emission of the atmosphere will cause Luo.The pressure difference between the suction port and the exhaust port of the Roots vacuum pump is too large to overload the Roots vacuum pump. If the motor power of the Roots vacuum pump is simply increased, the Roots vacuum pump will be overheated and the tiny gap between the rotors of the Roots vacuum pump will soon be stuck by thermal expansion. The clearance between the rotors of Roots vacuum pump must be guaranteed in order to ensure that Roots vacuum pump can reach a higher vacuum. Therefore, the Roots vacuum pump must be equipped with a front-stage pump when it is used. When the pressure in the system is pumped to a certain range by the front-stage pump, the Roots vacuum pump can be started again, so that the overload of the Roots vacuum pump can be avoided. Water (liquid) ring vacuum pump, rotary vane vacuum pump, sliding valve vacuum pump, reciprocating vacuum pump and other vacuum pumps can be used in the front stage. Generally speaking, water ring pump is more advantageous than other vacuum pumps in Roots vacuum unit. This is mainly because it can extract a lot of condensable steam, especially when the mechanical vacuum pump of gas-ballast oil seal has insufficient ability to remove condensable steam, or the solvent used can deteriorate the performance of the pump oil, or when the vacuum system does not allow oil pollution. Obvious. The so-called water ring pump is a liquid ring pump with water as the liquid ring. There are many advantages of using water as the liquid ring, such as low cost, easy access, no pollution to the environment, etc. But there is also a big disadvantage. Because of the high saturated vapor pressure of water, the suction pressure of the water ring pump is also high. At this time, if the liquid with low saturated vapor pressure is used as the liquid ring, the limit vacuum degree of the pump can be increased. If the maximum allowable exhaust pressure of Roots pump in a unit is 10 Torr, the air pump must be increased when water is used as the liquid ring to be the front pump of the Roots pump. If mineral oil is used as the liquid ring instead, the air pump can be used as the front pump, which can simplify the device.
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Roots-Liquid Ring Vacuum System Product Picture:
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