Worm Gear Hard Seal Butterfly Valve
Worm Gear Hard Seal Butterfly Valve Introduction
Worm gear hard seal butterfly valve is based on imported advanced technique. This Worm gear hard seal butterfly valve adopts fine J shape elastic seal ring and triple offset multilayer metal hard sealing structure. It can be applied to the temperature below 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. The valve seat and disc made of stainless steel with different hardness, have good corrosion resistance and long service life. The valve has a bi-directional sealing, according to GB/T13927-92 pressure test standard.
Worm gear hard seal butterfly valve Characteristics:
1. The valve adopts triple offset sealing structure which cannot cause abrasion to valve seat and disc, having a good seal.
2. Seal ring made of stainless steel, combines with the advantages of the metal hard seal and elastic seal. No matter under low or high temperature, seal ring has a 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 a 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.
Worm gear hard seal butterfly valve Technical Data
| 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℃, fluoro-rubber: -20℃～200℃ | ||
| Applicable medium | Water, air, gas, oil and other weak corrosive fluid | ||
| Leakage rate | GB/T13927-92 | ||
Worm gear hard seal butterfly valve 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 |
Worm gear hard seal butterfly valve Standards
| Manufacturing standard | JB/T 8527-97 |
| Flange standard | GB9113-2000 |
| Face to Face standard | GB12221-89 |
| Examination standard | GB/T 13927-92 |
Worm gear hard seal butterfly valve 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 |
Please note that the above specifications are “general specifications” that pertain to the majority of our products. These specifications should only be used for general, informational purposes. The measurement/size of the goods delivered may be different from the data in the above table, please check with us when order placed.
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