Roots water jet complete vacuum unit

FJZJP seriesRoots water jet complete vacuum unitIt is composed of a Roots pump (mechanical booster pump) as the main pump and an intermediate pump, with a water jet pump as the front stage pump (the overcurrent components are coated with anti-corrosion technology to achieve high anti-corrosion effect).
Using a fully plastic horizontal water jet vacuum unit as the front stage pump, it can pump corrosive gases. The first stage Roots ultimate vacuum degree can reach 150Pa, the second stage Roots ultimate vacuum degree can reach 25Pa, and the third stage Roots pump ultimate vacuum degree can reach within 5Pa.

Roots water jet complete vacuum machineTechnical parameters of the group

Choosing a water ring pump as the front stage pump is more advantageous for Roots water ring vacuum units than other vacuum pumps. It overcomes the disadvantages of limited pressure difference when using a single water ring pump (the maximum pressure of the unit is significantly higher than that of a water ring pump) and low pumping rate at a certain pressure, while retaining the advantages of Roots pump's rapid operation and high pumping rate. Especially capable of extracting a large amount of condensable steam, especially when the mechanical vacuum pump of the gas ballast oil seal has insufficient ability to remove condensable steam, or the solvent used can deteriorate the pump oil and affect its performance, or when the vacuum system does not allow oil pollution. When equipped with explosion-proof motors and electrical appliances and following corresponding safety rules, flammable and explosive gases can also be extracted. Therefore, Roots pump water ring pump units are widely used in the chemical industry for vacuum distillation, vacuum evaporation, dehydration crystallization; Freeze drying in the food industry; Vacuum drying in the pharmaceutical industry; Polyester chips for the textile industry; In the vacuum pumping system for high-altitude simulation experiments, etc

Roots vacuum pumps (mechanical booster pumps) used for higher vacuum cannot directly exhaust the atmosphere. Direct exhaust of the atmosphere can cause a large pressure difference between the suction and exhaust ports of the Roots vacuum pump, resulting in overload of the Roots vacuum pump. Simply increasing the power of the Roots vacuum pump motor can cause the Roots vacuum pump to overheat, causing the small gaps between the rotors of the Roots vacuum pump to quickly become stuck due to thermal expansion. To ensure that the Roots vacuum pump can achieve a high vacuum, it is necessary to ensure the gap between the rotors of the Roots vacuum pump. Therefore, when using a Roots vacuum pump, a front-end pump must be installed to pump the system pressure to a certain range before starting the Roots vacuum pump, which can avoid overloading of the Roots vacuum pump. Pre stage pumps can be selected from vacuum pumps that can directly discharge air, such as water (liquid) ring vacuum pumps, rotary vane vacuum pumps, slide valve vacuum pumps, reciprocating vacuum pumps, etc.