Stainless Steel Butterfly Valve uses sophisticated J-shaped elastic ring and three eccentric multi-level metal seal structure is widely used medium temperature ≤425 ℃ of metallurgy, electric power, petrochemical, as well as drainage and municipal construction and other industrial pipeline on, for regulating the flow and load off fluid use. The valve adopts three eccentric structure, seat and disc sealing surface are made of stainless steel with different hardness and has good corrosion resistance, long life, this valve is bi-directional sealing function, the products meet the national GB / T13927-92 valve pressure test standards. Characteristics of the stainless steel butterfly valve with three eccentric seal structure, seat and disc almost no wear, with the view of the tight sealing function. Body made of stainless steel production, with a metal seal and elastic sealing of the dual advantages, both in the case of low and high temperatures, all with excellent sealing performance, corrosion resistance and long service life. Dish plate sealing surface using cobalt-based alloy welding, sealing surface wear resistance and long service life. Large size disc using lattice structure, high strength, flow area, flow resistance. The valve has a two-way sealing function, the installation of unrestricted flow of media, is not affected by spatial location can be installed in any direction. Drive can multi-position (rotated 90 ° or 180 °) to install, easy to use. Stainless steel butterfly main technical parameters Nominal by DN (mm) 50 ~ 2000 Nominal pharmacological PN (MPa) 0.6 1.0 1.6 2.5 Seal Test (MPa) 0.66 1.1 1.76 2.75 strength test (MPa) 0.9 1.5 2.4 3.75 Temperature Carbon Steel: -29 ℃ ~ 425 ℃ stainless steel: -40 ℃ ~ 650 ℃ Suitable medium water, air, gas, oil and weak corrosive fluid leakage rate in line with GB / T13927-92 standard drive mode worm gear, electric, pneumatic, hydraulic stainless steel butterfly main Part Name Material Body Parts material WCB, alloy steel, stainless steel, QT450-10 disc WCB, alloy steel, stainless steel, QT450-10 valve shaft 2Cr13 stainless steel ring stainless steel flexible graphite packing rings butterfly using standard manufacturing standards JB / T 8527-97 flange structural length standard GB9113-2000 standard GB12221-89 inspection standards GB / T 13927-92 D373H-10/16/25 / worm gear Wafer butterfly hard seal stainless steel main external connection size (unit: mm) Nominal by (DN) main dimensions flange dimensions and bolt specifications 1.0MPa 1.6MPa 2.5MPa LH 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