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    LG vacuuum pump
    LG vacuuum pump
    Sliding vane rotary vacuuum pump
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    WUXI CITY SIFANG VACUUM EQUIPMENT CO.,LTD.
    WEB:http://www.jessicakmiec.com
    E-MAIL:sfpumps@163.com
    TEL:0510-85990421 85990035
    FAX:0510-85993842
    ADD:No.48 Changkang Road, Mashan, Binhu District, Wuxi
     
    Products
    Contents brief introduction
    2X Series

    Sliding vane rotary vacuum pumps

            

       Instruction of working principle of sliding vane rotary vacuum pumps
    The functional diagram of rotating vane pumps is shown in the figure. The rotating vane pump mainly consists of the stator, rotor, rotary vane, fixed cover, spring and components. The structure is formed by rotor which eccentricly installed in the chamber of the stator (the outer circle of the stator is tangental to the inner surface of rotor, and the gap between the two is very small) and the two rotary vanes which adhere to the inner wall of the stator with the assistance of spring tension and centrifugal force and slide in the rotor slot, and when the rotor rotating, the two rotary vanes are always sliding along the inner wall of the stator.

    The two rotary vanes divide the crescent-shape space formed by surrounding by the rotor, chamber of stator and fixed cover into three parts A, B and C.
        
     When the rotor rotating by the direction shown in the figure, the capacity of space A, which is connected to the air entry, continuously increases, and the pressure in space A continuously gets down. When the pressure in space A is lower than that in the container in which the gas is pumped, according to the principle of gas pressure balance, the pumped gas is continuously drawn into the suction chamber A, that is the pump is in
    the process of suction. At this time, the capacity of the space of chamber B is gradually reduced, the pressure continuously increases, that is the pump is in the process of compression. With the capacity of space C which is connected with the air outlet is further reduces, the pressure in space C further increases. When the gas pressure is higher than the exhaust pressure, the compressed gas opens the exhaust valve, and the pumped gas continuously pass through the oil layer of the oil tank to the atmosphere. In the continuous running of the pump, it continuously repeats the process of suction, compression, and exhaust, so as to achieve continuous pumping.

    The exhaust valve is immersed in the oil to prevent air flowing into the pump. The oil gets into the pump chamber through the gap on the pump body, oil hole and the exhaust valve, to cover the moving surfaces in the chamber and form the seal of the suction chamber and exhaust chamber; in addition, the oil also full up all the harmful space to remove their impact on the ultimate vacuum.
    Two-stage sliding vane rotary vacuum pump consists of two working chambers which are connected in series and rotating at the same speed by the same direction. ChamberⅠis at a low vacuum level, while chamber is at a high  vacuum level. The pumped gas enters chamber through  the air inlet. When the intake gas pressure is higher, the gas will be compressed in chamber , so that the pressure rapid increases, and the compressed gas will be not only exhausted from the senior exhaust valve, but also pass through the passage of the intermediate wall and enter chamber , then be compressed in chamber and exhausted from the low-level exhaust valve; when the pressure of the gas entering chamber Ⅰis low, despite the gas is compressed in chamber Ⅰ, it still can not open the senior exhaust alue to get out. All the gas enters chamber Ⅰ through the passage of the intermediate wall, and by compressed in chamber Ⅰ, it is exhausted from the low-level exhaust valve. Therefore, the ultimate vacuum of the two-stage sliding vane rotary vacuum pump is higher than that of the single-stage sliding vane rotary vacuum pump.

    Range of use


    2X pump is one of the basic equipment for obtaining vacuum for airtight containers by exhausting gas. It can be used alone, or used as the fore pump in front of the booster pump, diffusion pump, molecular pump, etc. This pump is applicable to the vacuum metallurgy, vacuum welding, vacuum impregnation, coating, vacuum drying, as well as the vacuum treatments in chemical and pharmaceutical industry, electric vacuum devices and other industries.

     Notices


    1. The pump can work within the ambient temperature range of 5~40 and under the inlet pressure less than 1330Pa. It is also allowable for long-term continuous work.
    2. The pump is neither applicable to pump the gases which have excessive oxygen content, poisonous and explosive feature, corrosive effects to  etals and chemical reactions with oil of pumps, and dust particles, nor act as a transfer pump to transfer gas form one container to another.
    3. The continuous working hours of the pump under the inlet air pressure of 6000Pa shall not exceed 3min to avoid damages caused by oil injection or bad lubrication.

    Performances and specifications


    Model
    Functions

    2X-4A

    2X-8A

    2X-8

    2X-15

    2X-30A

    2X-70A

    (L/S)
    Pumping Speed

    4

    8

    8

    15

    30

    70

    (≤Pa)
    Ultimate Pressure

    ≤6×10-2

    (kw)
    Motor Power

    0.55

    1.1

    1.1

    2.2

    3

    5.5

    (℃)
    Temperature Rise

    ≤40℃

    dB(A)
    LW Noise

    ≤75

    ≤78

    ≤78

    ≤80

    ≤82

    ≤86

    (mm)
    Inlet Diameter

    Φ25

    Φ25

    Φ40

    Φ40

    Φ65

    Φ80

    (rpm)
    Rotational Speed

    450

    550

    320

    320

    450

    420

    (L)
    Injection Amount of Oil

    0.7

    0.9

    2

    2.8

    2

    4.2

    (cm)
    Size

    55×34×41

    55×43×44

    79×43×54

    79×53×54

    78×50×56

    91×65×70

    (Kg)
    Weight

    54

    70

    135

    196

    240

    428

     

    2X-4A、8A Type


    Installing dimension drawing


     

     

     

    Type 

    A

    B

    C

    D

    E

    4-Φ

    2X-4A

    410

    340

    200

    550

    480

    Φ10

    2X-8A

    440

    430

    200

    550

    480

    Φ10

    2X-8、15 Type


    Type

    A

    B

    C

    D

    E

    F

    2X-8

    431

    384

    260

    104

    215

    274

    2X-15

    531

    484

    356

    110

    261

    324

    Installing dimension drawing


    2X-30A、70A Type


     

    Installing dimension drawing

     


    Characteristic curve




     
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    Add:No.48 Changkang Road, Mashan, Binhu District, Wuxi Tel:0510-85990421 85990035
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