Bellows Seal Globe Valve with special sealing performance. It uses bellows as the main sealing element and can effectively prevent medium leakage. Since the bellows seal replaces the traditional packing seal, the leakage problem caused by packing aging is reduced, thereby increasing the service life of the valve and not need the regular maintenance.
Bellows sealed globe valves are widely used in chemical, oil, gas, petrochemical and power industries, Especially when handling hazardous chemicals, corrosive media and high pressure environments,this type valve have the excellent performance.
▪The Bellows seal globe valve ls a new kind of globe valves with dual-seal. So its sealing performance is Excellent. The sealing surface is bead welding with hard alloy and the stem surface is in ‘nitrogen treatment. Hence, it is the valve of attrition-resistant good anti-corrosion performance and long service life.
▪Bellows seal globe valve can meet strict requirements of tightness and severe working conditions.
▪Except for the conventional packing assembly as all the globe valve,the bellows seal globe valve also has a bellow packing device.
The accordion-shaped bellows is contained and protected inside the thick metal tube.One end of the bellows is welded to the valve stem, and the other end is welded to the protective tube.
With the wide flange of the tube firmly clamped in the bonnet of the valve, it can free from the leakage.
▪In particular chemical processes the fluids in the pipes are often toxic, radioactive and hazardous. Bellows seal globe valves are used to prevent leakage of any toxic chemical to the atmosphere. Body material can be selected from all available materials,The bellow can be supplied in different materials like 316Ti, 321, C276 or Alloy 625.
| 300 | 850 | 630 | 500 | 485 | 430 | 16-30 | 395 | 34 | 4 |
| 250 | 730 | 600 | 450 | 425 | 370 | 12-30 | 335 | 32 | 3 |
| 200 | 600 | 550 | 400 | 360 | 310 | 12-26 | 278 | 30 | 3 |
| 150 | 480 | 515 | 350 | 300 | 250 | 8-26 | 218 | 28 | 3 |
| 125 | 400 | 400 | 300 | 270 | 220 | 8-26 | 188 | 26 | 3 |
| 100 | 350 | 370 | 250 | 235 | 190 | 8-22 | 162 | 24 | 3 |
| 80 | 310 | 265 | 220 | 200 | 160 | 8-18 | 138 | 24 | 3 |
| 65 | 290 | 260 | 200 | 185 | 145 | 8-18 | 122 | 22 | 3 |
| 50 | 230 | 250 | 180 | 165 | 125 | 4-18 | 102 | 20 | 3 |
| 40 | 200 | 235 | 160 | 150 | 110 | 4-18 | 88 | 18 | 3 |
| DN | L | H | Do | D | D1 | Z-φd | D2 | B | f |
