Worm Gear Hard Seal Butterfly Valve

Worm Gear Hard Seal Butterfly Valve
Model No.: D373H Hits: 11
China Butterfly Valve manufacturer Xinhai offers Worm Gear Hard Seal Butterfly Valves in WCB, alloy steel, stainless steel, QT450-10, 1.0/1.6/2.5MPa.
  • Worm gear hard seal butterfly valve, based on imported advanced technique, adopts fine J shape elastic seal ring and triple offset multilayer metal hard sealing structure. Applicable temperature belows 425℃. Worm gear hard seal butterfly valve is widely used to regulate flow or closure medium in metallurgy, petroleum, power and other industries. The valve utilizes triple offset sealing structure. Valve seat and disc made of stainless steel with different hardness, have good corrosion resistance and long service life. The valve has bi-directional sealing, according to GB/T13927-92 pressure test standard.
     
    Characteristics of wafer hard seal butterfly valve
    1. The valve adopts triple offset sealing structure which cannot cause abrasion to valve seat and disc, having good seal.
    2. Seal ring made of stainless steel, combines with the advantages of metal hard seal and elastic seal. No matter under low or high temperature, seal ring has good seal.
    3. Disc overlay with STL, has abrasion resistance and long service life.
    4. Large size butterfly valve, utilizing lattice structure, has high strength, large flow area and small flow resistance.
    5. The valve has bi-directional seal. It can be installed at any position without the limitation of medium flow and space.
    6. Actuating device adopts multistage installment which is convenient to use.
     
    Technical parameter
    Nominal diameter(mm) 50~2000 50~1600
    Nominal Pressure PN(MPa) 0.6 1.0 1.6
    Seal test(MPa) 0.66 1.1 1.76
    Strength test(MPa) 0.9 1.5 2.4
    Applicable temperature Nitrile rubber: -40℃~90℃, fluororubber: -20℃~200℃
    Applicable medium Water, air, gas, oil and other weak corrosive fluid
    Leakage rate GB/T13927-92
     
    Components materials
    Components  Materials 
    Valve body WCB, alloy steel, stainless steel, QT450-10
    disc WCB, alloy steel, stainless steel, QT450-10
    Valve shaft 2Cr13 stainless steel, alloy steel
    Seal ring Stainless steel
                          Packing Flexible graphite

    Standards 
    Manufacturing standard JB/T 8527-97
    Flange standard GB9113-2000
    Face to Face standard GB12221-89
    Examination standard GB/T 13927-92
     
    Connection dimensions (unit: mm)
    Nominal diameter(DN) Dimensions  Flange sizes & bolt specifications
    1.0MPa 1.6MPa 2.5MPa
    L H H1 D1 4-Ф-M D1 4-Ф-M D1 4-Ф-M
    50 43 350 112 125 Ф18 125 Ф18 125 Ф18
    65 46 370 115 145 Ф18 145 Ф18 145 Ф18
    80 49 380 120 160 Ф18 160 Ф18 160 Ф18
    100 56 420 138 180 Ф18 180 Ф18 190 Ф23
    125 64 460 164 210 Ф18 210 Ф18 220 Ф27
    150 70 555 175 240 Ф23 240 Ф23 250 Ф27
    200 71 605 208 295 M20 295 M20 310 M24
    250 76 680 243 350 M20 355 M24 370 M27
    300 83 800 283 400 M20 410 M24 430 M27
    350 92 835 310 460 M20 470 M24 490 M30
    400 102 915 340 515 M24 525 M27 550 M33
    450 114 960 380 565 M24 585 M27 600 M33
    500 127 1020 410 620 M24 650 M30 660 M33
    600 154 1225 470 725 M27 770 M33 770 M36
    700 165 1355 550 840 M27 840 M33 875 M39
    800 190 1470 640 950 M30 950 M36 990 M45
    900 203 1545 710 1050 M30 1050 M36 1090 M45
    1000 216 1795 770 1160 M33 1170 M39 1210 M52
    1200 254 1965 890 1380 M36 1390 M45 1420 M52

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