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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
    JZJS Roots-water ring pump unit

    Working principle of roots vacuum units

            

    JZJS roots vacuum unit is made up of the series connected roots pump and water ring pump, where the roots pump is the main pump and the water ring pump is used as the fore pump. It is more efficient for the roots water ring vacuum unit to select a water ring vacuum pump as the fore pump, which overcomes the ultimate pressure difference when using a single water ring pump (compared with the water ring pump, the ultimate pressure of the unit is great improved), and the low pumping rate under a certain pressure, while retaining the fast work and higher pumping rate of the roots pump. In particular, it is adapt to pump a great amount of condensable vapors, and it is more obvious when the capacity of the gas ballast oil sealed mechanical vacuum pump is insufficient to pump condensable vapors, or the applied solvents deteriorate the pump oil to influence performances, or the vacuum system does not allow oil pollution.  When equipped with an explosion-proof electric motor and in compliance with appropriate safety regulations, it can be also used to pump flammable and explosive gases. Therefore roots pump – water ring pump unit is widely used for the vacuum distillation, vacuum evaporation, dehydration and crystallization in the chemical industry; freeze drying in the food industry; the vacuum drying in the pharmaceutical industry; the terylene section cutting in the light textile industry; the vacuumizing system in high-altitude simulation test, and so on.
    Roots water ring vacuum units generally include the following types:
    (1) Roots pump-water ring pump: The water ring pump in this unit is used to produce the fore vacuum required for the roots pump. In general, the ultimate vacuum degree of the single-stage water ring vacuum pump is not high, and at present, the roots pumps made in China require higher ultimate vacuum degree, thus, in fact, the single-stage water ring pump is not usually used as the fore pump of the roots pump. The two-stage water ring pump with lower ultimate pressure can be applied as the fore pump, or reduce the ultimate pressure of the unit.
    The ultimate pressure of one roots pump and one water ring pump is 400Pa, which can meet the general needs of vacuum, but the range of use is subject to certain restrictions. If combine two series connected roots pumps and the water ring pump, the ultimate pressure can be greatly increased (up to 25Pa). Therefore, for this type, the combination of two series connected roots pumps with a twostage pump as the pore pump (Figure 1) is common to compose the unit. If need a higher ultimate pressure, a combination of three roots pumps with a water ring pump can be used, whose ultimate pressure can be up to t 1Pa.
    (2) If the three-stage roots water ring unit can not meet the ultimate pressure, the roots pump-water ring pump parallel mechanical vacuum pump can be adopted; this unit is mainly for a vacuumizing system which is used to treat a great amount of water vapor, and requires a long time and a very high ultimate vacuum degree, e.g, in the vacuum drying area.
    In the vacuum system which is used to treat a great amount of water vapor, water ring pump is more appropriate choice. However, its ultimate vacuum degree is not high, as a result, the ultimate vacuum degree of the entire unit is lower (relatively).
     

    Although in the vacuumizing system requiring higher vacuum degree, the mechanical vacuum pump of higher ultimate vacuum shall be used as the fore pump, the gas ballast mechanical vacuum pump and water-ring pump can be connected in series to act as the fore pump of the roots pump (see Figure 2). In vacuum drying, first use the water ring pump for forepumping until there is a significant reduction in water vapor, and then switch on the gas ballast mechanical vacuum pump, and switch off the water ring pump. If it takes longer time to complete drying, the required cooling water and power is less as shown in Figure 2.

    Range of use


    As a result of the application of water ring pump as fore pump, this unit is particularly applicable to the technological process of pumping gases containing a lot of vapor and certain corrosive and condensable gases, such as vacuum distillation, evaporation, dehydration, crystallization and drying process, etc. .

    Performances and specifications


    Function
    Model
    (L/S)
    PumpingSpeed
    (≤Pa)
    Ultimate
    Pressure
    ConstructionofPumpSystem (kw)
    TotalPower
    (mm)
    InletDiameter
    (mm)
    OutletDiameter
    (kg)
    MainPump
    HoldingPumpTwo
    HoldingPumpOne
    BackingPump
    JZJS30-1 30 400 ZJ30     2SK-1.5 4.75 Φ50 Φ40 300
    JZJS70-2 70 400 ZJ70     2SK-1.5 5.5 Φ80 Φ40 325
    JZJS70-1 70 400 ZJ70     2SK-3 9 Φ80 Φ40 420
    JZJS150-2 150 400 ZJ150A     2SK-3 10.5 Φ100 Φ40 525
    JZJS150-2A 150 400 ZJ150A     SZ-250 14 Φ100 Φ100 610
    JZJS150-1 150 400 ZJ150A     2SK-6 18 Φ100 Φ50 650
    JZJS300-2 300 400 ZJ300     2SK-6 19 Φ150 Φ50 985
    JZJS300-2A 300 400 ZJ300     SZ-360 19 Φ150 Φ100 1015
    JZJS300-1 300 400 ZJ300     2SK-12 26 Φ150 Φ100 1485
    JZJS600-2 600 400 ZJ600     2SK-12 29.5 Φ150 Φ100 1520
    JZJS600-2A 600 400 ZJ600     2SK-20 44.5 Φ150 Φ125 2630
    JZJS1200-2 1200 400 ZJ1200     2SK-30 66 Φ300 Φ125 4070
    JZJS30-11 30 25 ZJ30   ZJ30 2SK-1.5 5.5 Φ50 Φ40 380
    JZJS70-21 70 25 ZJ70   ZJ30 2SK-1.5 6.25 Φ80 Φ40 420
    JZJS70-12 70 25 ZJ70   ZJ70 2SK-1.5 7 Φ80 Φ40 440
    JZJS70-11 70 25 ZJ70   ZJ70 2SK-3 10.5 Φ80 Φ40 535
    JZJS150-21 150 25 ZJ150A   ZJ70 2SK-3 12 Φ100 Φ40 600
    JZJS150-12 150 25 ZJ150A   ZJ150A 2SK-3 13.5 Φ100 Φ40 710
    JZJS150-11 150 25 ZJ150A   ZJ150A 2SK-6 21 Φ100 Φ50 920
    JZJS300-22 300 25 ZJ300   ZJ150A  2SK-3 14.5 Φ150 Φ40 1150
    JZJS300-21 300 25 ZJ300   ZJ150A 2SK-6 22 Φ150 Φ50 1350
    JZJS300-12 300 25 ZJ300   ZJ150A 2SK-6 23 Φ150 Φ50 1510
    JZJS300-11 300 25 ZJ300   ZJ300 2SK-12 30 Φ150 Φ100 1880
    JZJS600-22 600 25 ZJ600   ZJ300 2SK-6 26.5 Φ150 Φ50 1665
    JZJS600-21 600 25 ZJ600   ZJ300 2SK-12 33.5 Φ150 Φ100 1980
    JZJS1200-22 1200 25 ZJ1200   ZJ300 2SK-12 40.5 Φ300 Φ100 3200
    JZJS1200-22A 1200 25 ZJ1200   ZJ600 2SK-20 55.5 Φ300 Φ125 4270
    JZJS1200-21 1200 25 ZJ1200   ZJ600 2SK-30 73.5 Φ300 Φ125 4670
    JZJS30-111 30 1 ZJ30 ZJ30 ZJ30 2SK-1.5 6.25 Φ50 Φ40  
    JZJS70-211 70 1 ZJ70 ZJ30 ZJ30 2SK-1.5 7 Φ80 Φ40  
    JZJS150-211 150 1 ZJ150A ZJ70 ZJ70 2SK-3 13.5 Φ100 Φ40  
    JZJS300-411 300 1 ZJ300 ZJ70 ZJ70 2SK-3 14.5 Φ150 Φ40  
    JZJS300-221 300 1 ZJ300 ZJ150A ZJ70 2SK-3 16 Φ150 Φ40  
    JZJS300-211 300 1 ZJ300 ZJ150A ZJ150A 2SK-6 25 Φ150 Φ50  
    JZJS600-411 600 1 ZJ600 ZJ150A ZJ150A 2SK-6 28.5 Φ150 Φ50  
    JZJS600-221 600 1 ZJ600 ZJ300 ZJ150A 2SK-6 29.5 Φ150 Φ50  
    JZJS1200-221 1200 1 ZJ1200 ZJ600 ZJ300 2SK-12 44.5 Φ300 Φ100  
    JZJS2500-222 2500 1 ZJ2500 ZJ600 ZJ600 2SK-20 74 Φ300 Φ125  


    Type of Unit L1 L2 L3 L4 L5 L6 L7 L8 L9 H1 H2 H3 H4 H5 H6 H7 E F K ΦD
    JZJS30-1 550 17.5 515 137 600 310 145 874 1135 1551 1377 421 1515 1420 545 725 275 275 465 14
    JZJS70-2 550 17.5 515 137 600 310 145 874 1135 1551 1385 421 1515 1445 545 725 275 275 465 14
    JZJS70-1 650 20 610 153 700 383 145 1006 1320 1577 1411 437 1541 1470 562 742 244 406 535 14
    JZJS150-2 800 20 760 153 700 383 145 1006 1320 1709 1543 437 1672 1636 562 742 400 562 535 14
    JZJS150-2A 800 22.5 755 200 800 250 40 1200 1250 1824 1658 665 1787 1751 565 1020 490 310 595 14
    JZJS150-1 800 20 760 226 800 458 204 1252 1638 1790 1625 510 1753 1717 635 815 400 610 634 14
    JZJS300-2 800 20 760  226 800 458 204 1252 1638 1990 1870 510 2090 1960 635 815 400 610 634 14
    JZJS300-2A 900 20 860 250 800 290 175 1300 1380 2137 2016 665 2233 2102 565 1020 490 310 595 14
    JZJS300-1 1000 25 950 382 1000 814 100 1764 2060 2250 2130 710 2345 2215 925 1225 417 700 869 25
    JZJS600-2 1000 25 950 382 1000 814 100 1764 2060 2250 2130 710 2345 2215 925 1225 417 700 869 25
    JZJS600-2A 1200 25 1150 420 1100 845 80 1940 2319 2457 2336 910 2553 2422 1117 1417 425 775 867 25
    JZJS1200-2 2209 25 2159 502 1000 812 234 2004 2698 2062 2056 910     1120 1420 450 2194 997 25
    JZJS30-11  550 17.5 515 137 600 310 145 874 1135 2001 1827 421 1965 1870 545 725 275 275 465 14
    JZJS70-21  650 20 610 137 600 310 145 874 1135 2051 1885 421 2014 1950 545 725 325 325 465 14
    JZJS70-12 650 20 610 137 600 310 145 874 1135 , 2051 1885 421 2014 1950 545 725 325 325 465 14
    JZJS70-11   650 20 610 153 700 383 145 1006 1320 2077 1911 437 2040 1970 562 742 244 406 535 14
    JZJS150-21 800 20 760 153 700 383 145 1006 1320 2201 2035 437 2162 2126 562 742 400 562 535 14
    JZJS150-12 800 20 760 153 700 383 145 1006 1320 2331 2165 437 2292&a, mp;, lt;, /TD> 2256 562 742 400 562 535 14
    JZJS150-11 800 20 760 226 800 458 204 1252 1638 2415 2250 510 2375 2340 635 815 400 610 634 14
    JZJS300-22 1175 20 1135 153 700 383 145 1006 1320 2242 2121 437 2207<, /, TD> 2338 562 742 922 354 535 14
    JZJS300-21 1175 20 1135 226 800 458 204 1252 1638 2325 2210 510 2290 2420 635 815 922 402 634 14
    JZJS300-12  1460 20 1420 226 800 458 204 1252 1638 1955 1835 510 1945 2075 635 815 253 777 634 14
    JZJS300-11 1504 22 1460 382 1000 814 100 1764 2060 2266 2145 710 2231 2362 925 1225 253 1016 869 25
    JZJS600-22 1460 20 1420 226 800 458 204 1252 1638 1955 1835 510 1945 2075 635 815 253 777 634 14
    JZJS600-21 1504 22 1460 382 1000 814 100 1764 2060 2266 2145 710 2231 2362 925 1225 253 1016 869 25
    JZJS1200-22 2400 25 2350 382 1000 814 100 1764 2060 2150 2060 710     1015 1315 450 2124 869 25
    JZJS1200-22A 2600 25 2550 420 1100 845 80 1940 2319 2357 2060 910     1120 1420 450 2194 869 25
    JZJS1200-21 2600 25 2550 483 1200 975 80 2166 2698 2357 2060 910     1120 1420 450 2194 997 25
    JZJS30-111 1100 20 1060 137 600 310 145 874 1135 1790 1616 421 1754 1660 545 725 257 300 465 14
    JZJS70-211 1100 20 1060 137 600 310 145 874 1135 1790 1630 421 1753 1683 545 725 257 300 465 14
    JZJS150-211 1100 20 1060 153 700 383 145 1006 1320 1934 1768 437 1897 1861 562 742 192 381 535 14
    JZJS300-411  1250 20 1210 153 700 383 145 1006 1320 2207 2086 437 2172 2303 562 742 253 380 535 14
    JZJS300-221 1325 20 1285 153 700 383 145 1006 1320 2442 2321 437 2407 2538 562 742 253 416 535 14
    JZJS300-211 1462 20 1422 226 800 458 204 1252 1638 2257 2136 510 2223 2354 635 815 250 493  634 14
    JZJS600-411 1462 20 1422 226 800 458 204 1252 1638 2257 2136 510 2223 2354 635 815 250 493 634 14
    JZJS600-221     1462 20 1422 226 800 458 204 1252 1638 2260 2140 510 2222 2353 635 815   253 493 634 14
    JZJS1200-221  2200 25 2150 382 1000 814 100 1764 2060 2781 2787 710     925 1225 438   1030 867 25
    JZJS2500-222   2600 25 2550 445 1100 845 80 1990 2370 3248 3131 910         438 406   25

    Installing dimension drawing of JZJS



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