Structural principle of Roots vacuum unit

Dongguan Punok Vacuum Technology Co., Ltd. is a domestic manufacturer of vacuum units, specializing in the design and manufacture of various vacuum units, including vacuum pump units, rotary vane vacuum units, Roots vacuum units, and vacuum systems.

Punok vacuum unit2-level bracket type composition:

It is a combination of oil rotary vane vacuum pump, Roots pump, installation bracket, connecting pipe, control box, oil mist filter, etc., used for vacuum exhaust of production and research equipment.

Characteristics of vacuum unit products:

PNK VSThe series Roots pump unit is a multi-stage Roots dry pump, which is assembled by installing brackets, connecting pipes with control boxes, mufflers, etc. It is used for vacuum exhaust of production and research equipment.

Application of Punok vacuum unit products:

Evaporation coating, sputtering coating, ion coating, optical coating, etc

Single crystal furnace, polycrystalline furnace, vacuum heat treatment furnace, sintering furnace, annealing furnace, quenching furnace, etc

Vacuum drying, freeze-drying, leak detection equipment and systems, gas recovery systems, liquid crystal injection, etc

Refrigerators, household air conditioners, air conditioners, energy-saving lamps, backlights, automatic evacuation lines, exhaust equipment, etc

Scope of application:

Used for suctioning air and other non condensable and non corrosive gases, it is widely used in various vacuum systems that require high pumping speed and low/high vacuum, especially in rough and medium vacuum systems. For example, obtaining dynamic vacuum in vacuum smelting, steel degassing, vacuum sintering, large-scale space simulation experiments, vacuum impregnation treatment of power capacitors and transformers, exhaust on automatic production lines of fluorescent tubes and light bulbs, continuous exhaust of insulated bottle liners, pre extraction in vacuum coating equipment, extraction during magnesium reduction process, degassing during single crystal silicon extraction process, and so on.

Advantage:

Oil free, dry, and clean

● Homogenization in the low-temperature field

● High pumping speed can shorten exhaust time

Excellent corrosion resistance

Low noise, low vibration

Structural principle of Roots vacuum unit：

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 the corresponding safety rulesIt can also extract flammable and explosive gases. 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 pump for higher vacuum(Mechanical booster pump) cannot directly exhaust the atmosphere. Direct exhaust of the atmosphere will 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 will cause the Roots vacuum pump to overheat, causing the small gap between the Roots vacuum pump rotors 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.

In general, using a water ring pump as the front stage pump is more advantageous than other vacuum pumps for Roots vacuum units. This is mainly because it can extract a large amount of condensable steam, especially when the mechanical vacuum pump with 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.

Structural principle of Roots vacuum unit