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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
    SK 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


    They are mainly for pumping air and other gases which have certain corrosively and a small amount of dust, and are not soluble in water,
    and widely used in the technical processes of vacuum evaporation, concentration, feeding, dehydration, drying, and so on in food, textile, medicine, chemical industry and other fields. 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

    (Kw)
    Motor Power


    (rpm)
    Rotational
    Speed

    (L/min)
    Flow of Supplying Water


    (mm)
    Inter(outer)Diameter
    Pressure


    (kg)
    weight

    SK-1.5

    1.5

    6.7×103

    4

    1440

    10~15

    Φ65

    180

    SK-3

    3

    6.7×103

    7.5

    1440

    15~20

    Φ65

    275

    SK-6

    6

    6.7×103

    15

    1460

    25~35

    Φ100

    450

    SK-12

    12

    6.7×103

    22

    970

    40~50

    Φ125

    900

    SK-20

    20

    6.7×103

    37

    740

    60~80

    Φ150

    1940

    SK-30

    30

    6.7×103

    55

    740

    70~90

    Φ150

    2340

    SK-1.5、3、6 Type


    Type

    A

    B

    C

    D

    E

    F

    I

    J

    L

    G

    d1

    d2

    N-d3

    4-Φ

    SK-1.5

    423

    262

    873

    990

    340

    400

    562

    268

    162

    30

    Φ145

    Φ125

    4-Φ12

    18

    SK-3

    605

    313

    1072

    1190

    395

    445

    562

    307

    162

    30

    Φ150

    Φ125

    4-Φ12

    18

    SK-6

    695

    405

    1317

    1410

    400

    460

    680

    342

    210

    25

    Φ170

    Φ145

    4-Φ15

    18

    Installing dimension drawing


    SK-12、20、30 Type



     

    Type

    A

    B

    C

    D

    E

    F

    I

    J

    L

    G

    D1

    D2

    D3

    SK-12

    940

    442

    1447

    1833

    380

    430

    965

    480

    280

    G1/2”

    250

    210

    14

    SK-20

    1000

    542

    1719

    2139

    660

    720

    1215

    515

    350

    G3/4”

    275

    240

    18

    SK-30

    1200

    566

    1932

    2468

    720

    780

    1215

    579

    350

    G3/4”

    275

    240

    18

     

    Characteristic curve


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