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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
    WLW series vertical oil-free reciprocating vacuum pumps

    Instruction of the principle of reciprocating vacuum pumps

            

       Reciprocating vacuum pump (also called piston vacuum pump) is one of the low-vacuum obtaining equipment. Its ultimate pressure is usually within 1330~2660Pa, and the pumping rate range is wider that is from 50L/S to 600L/S. Reciprocating vacuum pump is applicable to the vacuum impregnation, vacuum treatment of molten steel, vacuum distillation, vacuum evaporation, vacuum concentration, vacuum crystallization, vacuum drying, vacuum filtration in petroleum, chemical industry, medicine, food, light industry, metallurgy, electric and other industries, as well as pumping gases for the vacuum treatment of concrete and other areas, but either not applicable pump the gases which have excessive oxygen content, poisonous and explosive feature, corrosive effects to metals, and dust particles, nor act as a transfer pump to transfer gas form one container to another.
     The functional diagram of reciprocating vacuum pumps is shown in the figure. The major components of a reciprocating pump include cylinder 1 and piston 2 which makes a straight reciprocating movement in the cylinder. The piston is driven by crank-link mechanism 3 (including the crosshead). In addition to the above components, there are exhaust valve 4, suction valve 5 and other important components, as well as the frame, crankcase, dynamic and static sealing, and other accessories.
    During the operation, driven by the motor, the piston in the cylinder makes a straight reciprocating movement thought the crank-link mechanism (rotary motion is turned to a rectilinear motion). When the piston traveling from left to right in the cylinder, as the volume of the left chamber of the cylinder increases, the pressure in the left chamber space continuously gets down, and when the pressure in the left chamber is lower than the that in the container in which the gas is pumped, according to the principle of gas pressure balance, the gas in the container is drawn into the left chamber through suction valve 5, that is, the pump is in the process of suction. When the piston reaches the right most position, the left chamber of the cylinder is full of gas. Then, the piston moves from right to left, and at this time, the suction valve 5 automatically closes. The gas is gradually compressed with the piston movement from right to left. When the gas pressure in cylinder reaches exhaust pressure, exhaust valve 4 is open, and the gas is exhausted to complete one working cycle. When the piston moves from the left to right, repeat the cycle until the pressure in the
    pumped container reaches a certain balance.
    In the reciprocating pump, suction valve and exhaust valve are very important components, and they wearing parts. Their working directly impact on the ultimate pressure, pumping rate, power consumption and reliability of running of the reciprocating pump.

    Range of use


    WLW vertical oil-free (corrosion-resistant) reciprocating vacuum pump is the upgraded product to replace W horizontal vacuum pump, and the principal equipment to obtain rough vacuum. As adopt the full sealing device, it realizes the complete isolation of the crankcase from the cylinder; in addition, self-lubricating materials are used for piston ring to achieve the advanced oil-free lubrication.
    Since no sewage is discharged, this type of vacuum pump is especially suitable for the vacuum distillation, vacuum evaporation, vacuum drying, vacuum concentration, vacuum impregnation, and other processes in chemical, medicine, food and other industries.

    Major features


    (1) Small power consumption and significant energy-saving effect;
    (2) Small floor space and low working noise;
    (3) Cylinder adopts forced water cooling with good cooling effect;
    (4) Adopt advanced sealing structure to put an end to oil splash;
    (5) Due to the rational structure and uniform stress of each moving part, the service life is extended.

    Performances and specifications


    Model Functions

    WLW-50

    WLW-70

    WLW-100

    WLW-150

    WLW-200

    WLW-300

    WLW-600

    (≤Pa)
    Ultimate Pressure

    2000

    2000

    2000

    2000

    2000

    2000

    2000

    (L/S)
    Pumping Speed

    50

    70

    100

    150

    200

    300

    600

    Motor


    Model

    Y132M1-6

    Y132M2-6

    Y160M-6

    Y160L-6

    Y180L-6

    Y200L2-6

    Y280S-6

    (kw)
    Power

    4

    5.5

    7.5

    11

    15

    22

    45

    (rpm)
    Rotational Speed

    270

    380

    350

    210

    280

    250

    240

    (mm)
    Inlet Diameter

    Φ50

    Φ50

    Φ95

    Φ125

    Φ125

    Φ160

    Φ245

    (mm)
    Outlet Diameter

    Φ50

    Φ50

    Φ95

    Φ125

    Φ125

    Φ160

    Φ245

    (mm)
    Diameter

    Φ15

    Φ15

    Φ15

    Φ15

    Φ15

    Φ15

    Φ15

    (mm)
    Diameter

    Φ15

    Φ15

    Φ15

    Φ15

    Φ15

    Φ15

    Φ15

    (℃)
    Temperature Rise

    ≤40

    ≤40

    ≤40

    ≤40

    ≤40

    ≤40

    ≤40

    (A)
    LW Noise

    ≤70

    ≤75

    ≤75

    ≤78

    ≤80

    ≤80

    ≤80

    (Kg)
    Weight

    500

    520

    700

    900

    1000

    1500

    3100


      Installing dimension drawing


     

    Size(mm) Type

    L

    L1

    L2

    L3

    L4

    L5

    A

    A1

    A2

    A3

    A4

    H2

    H3

    H4

    ΦD1

    ΦD2

    N

    Φd

    Φd1

    WLW-50

    1060

    970

    158

    400

    260

    590

    542

    332

    118

    385

    325

    50

    1184

    1458

    110

    90

    4

    10

    14

    WLW-70

    1060

    970

    158

    400

    260

    590

    542

    332

    118

    385

    325

    50

    1184

    1458

    110

    90

    4

    10

    14

    WLW-100

    1170

    1095

    190

    485

    300

    665

    616

    330

    132

    400

    360

    45

    1412

    1715

    170

    145

    4

    12

    15

    WLW-150

    1325

    1235

    263

    560

    400

    817

    700

    335

    192

    505

    450

    40

    1463

    1783

    200

    175

    8

    12

    18

    WLW-200

    1325

    1235

    263

    560

    400

    817

    765

    398

    192

    505

    450

    40

    1463

    1783

    200

    175

    8

    12

    18

    WLW-300

    1556

    1500

    278

    660

    500

    846

    871

    443

    203

    550

    500

    35

    1755

    2125

    240

    210

    8

    12

    18

    WLW-600

    2068

    1930

    360

    880

    530

    1150

    1100

    615

    265

    785

    735

    60

    2192

    2600

    390

    340

    12

    22

    25

    Characteristic curve


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