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    LG vacuuum pump
    LG vacuuum pump
    Sliding vane rotary vacuuum pump
    2X Sliding vane rotary vacuuum pump
    XD Sliding vane rotary vacuuum pump
    Water ring vacuuum pump
    2SK Two-stage Water ring vacuuum pump
    SK Water ring vacuuum pump
    SZ Water ring vacuuum pump
    2BE Water ring vacuuum pump
    Piston vacuuum pump
    WLW Oil-free vertical Piston vacuuum pump
    Roots vacuuum pump
    ZJ Roots vacuuum pump
    System
    JZJS Roots vacuuum pump System
    JZJX Roots vacuuum pump System
    JZJW Roots vacuuum pump System
    J2SK JSK J2BE Closed cycle System
    Blow Molding Machine
    YX1200 Large hollow blow molding Machine
    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
    2SK series

    Instruction of the principle of water ring vacuum pumps

            

    Water ring vacuum pump (referred to as water ring pump for short) is a kind of rough vacuum pump, which can obtain 4~8kPa ultimate pressure for the single-stage pump, and 2~4kPa for 4 ~ 8kPa for the two-stage pump.
    Water ring pump can be widely used in many technical processes in the petroleum, chemical, machinery, mining, light industry, paper-making, power, metallurgy, medicine, food and other industries and municipal and agricultural sectors, such as vacuum filtration, vacuum feeding, vacuum degassing, vacuum evaporation, vacuum concentration, vacuum resurgence, etc.

    As the gas compression process of the water ring pump is under isothermal condition, the flammable and explosive gases can be exhausted, as well as gases containing dust and water; therefore the application of the water ring pump is growing.
    The figure is the functional diagram of water ring pumps. The water ring pump consists of the impeller, pump body, suction and exhaust tray, water ring formed by water at the inner wall of pump body, air entry, air outlet, auxiliary exhaust valve, and other components.
    The impeller is eccentricly installed in the pump body. When the impeller rotating by the direction showed in the figure, the water entering the body of water ring pump impeller pump body is thrown around by the impeller, and as a result of centrifugal force, the water forms a closed water ring  constant thickness which is similar with the shape of the pump chamber. The internal surface of the upper part of water ring pump is exactly tangental to impeller wheel hub, and the internal surface of the lower part exactly contact the top of vanes (in fact, vanes are inserted into the water ring for a certain depth). At this time, a crescent-shape space is formed between the impeller wheel hub and the water ring, which is divided into several small chambers with same number of vanes by the impeller. If regard the ; of upper part of the impeller as the starting point, when the impeller rotating for 0~180, the capacity of the small chamber gradually increases, and pressure continuously gets down. As the chambers are connected with the air entry of the suction and exhaust tray, when the pressure in the small chamber space 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 small chamber, that is, the pump is in the process of suction. When the suction is completed, the small chamber is isolated from the air entry. The capacity of the small chamber is gradually reduced, the pressure continuously increases, that is the pump is in the process of compression. With the pressure of the compressed gas reaches the exhaust pressure in advance, it will be exhausted from the auxiliary exhaust valve. The capacity of the small chamber which connected with the air outlet is further reduced, and its pressure further increases. When the gas pressure is higher than the exhaust pressure, the compressed gas will be exhausted from the air outlet. In the continuous running of the pump, it continuously repeats the process of suction, compression, and exhaust, so as to achieve continuous pumping.
    In the water ring pump, the auxiliary exhaust valve is a special structure, and generally, it is a rubber ball valve. It is for eliminating the over compression and insufficient compression in the operation of the pump. The two phenomena will cause excessive power consumption. As the water ring pump does not have a direct exhaust valve, and exhaust pressure is always fixed, the compression ratio of the water ring pump is determined by the stop position of the air inlet and the initial position of the air outlet, however, the two positions are fixed;
    therefore it can not meet the needs of the variable suction pressure. To solve this problem, in general, a rubber ball valve will be equipped under the air outlet, so that when the pressure in the pump chamber reaches exhaust pressure before the time, the ball valve automatically opens and the gas is exhaust gas to eliminate the phenomenon of over compression. In general, for the design of the water ring pump, the compression ratio is
    always determined based on the minimum suction pressure to determine the initial position of the air outlet. As a result, insufficient compression is eliminated. 

    Range of use


    2SK water ring vacuum pumps are widely applied to the chemical industry, machinery, light industry, medicine, food, textile and other industries for pumping air or other gases which are not soluble in water, free of solid particles and non-corrosive so as to form a certain vacuum degree in sealing systems. It is usually used in the technical processes of vacuum evaporation, vacuum concentration, vacuum drying, vacuum filtration, vacuum
    feeding, etc. Pumps of this series possess compact structures, and are reliable to use, convenient to install and disassemble, and easy to maintain.

    Performances and specifications


     Function 
    Model

    (m3/min)
    Pumping
    Speed


    (Pa)
    Ultimate
    Pressure

    (Kw)
    Motor Power

    (rpm)
    Rotational
    Speed

    (L/min)
    Flow of Supplying Water

    (mm)
    Inter(outer)Diamete


    (kg)
    weight

    2SK-1.5

    1.5

    3.3×103

    4

    1440

    10~15

    Φ40

    200

    2SK-3

    3

    3.3×103

    7.5

    1440

    15~20

    Φ40

    295

    2SK-6

    6

    3.3×103

    15

    1460

    25~35

    Φ50

    480

    2SK-12

    12

    3.3×103

    22

    970

    40~50

    Φ100

    1000

    2SK-20

    20

    3.3×103

    37

    740

    60~80

    Φ125

    2100

    2SK-30

    30

    3.3×103

    55

    740

    70~90

    Φ125

    2500

     

    2SK-1.5、3、6 Type


    Installing dimension drawing


    Type 

    A

    B

    C

    D

    E

    F

    H

    I

    J

    K

    L

    G

    D1

    D2

    D3

    2SK-1.5

    600

    285

    1000

    1105

    340

    400

    405

    /

    194

    255

    /

    30

    140

    98

    M12

    2SK-3

    700

    342

    1200

    1315

    380

    460

    437

    525

    199

    350

    162

    30

    150

    110

    14

    2SK-6

    855

    396

    1460

    1580

    400

    600

    520

    630

    205

    452

    210

    25

    160

    125

    14

    2SK-12、20、30 Type


    Installing dimension drawing


    Type 

    A

    B

    C

    D

    E

    F

    H

    I

    J

    K

    L

    G

    D1

    D2

    D3

    2SK-12

    525

    585

    1657

    2052

    380

    430

    710

    857

    276

    635

    280

    G1/2”

    235

    200

    14

    2SK20

    700

    406

    1923

    2345

    660

    720

    910

    1100

    300

    635

    350

    G3/4”

    250

    210

    18

    2SK-30

    800

    397

    2136

    2670

    720

    780

    910

    1100

    300

    765

    350

    G3/4”

    250

    210

    18

    Characteristic curve


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