NST-DBK Axial Expansion Joints are flexible connection elements with the bellows that absorb prolongation contraction and vibration movements, which happen as a result of ambient temperature in pipe-line or a result of fluid. They are suitable to use in steam, super heated oil, heating system, pump-outlets and fire installations. Rotary flange, fixed flange, weld neck flange models are available .
| NECK | DIN 2501 ST 37 |
| BELLOWS | STAINLESS STEEL |
| LINER | STAINLESS STEEL |
| ASSEMBLY PART MATERIAL | CARBON STEEL or STAINLESS STEEL |
| OPERATING CONDITIONS | |
| PRESSURE CLASS (OPTIONAL) | PN16,25,40,64 |
| TEMPERATURE RANGE (depending on the material) | -90 ℃~550℃ |
| NO | PART NAME | MATERIAL |
| 1 | FLANGE | St 37.2,AISI304,AISI316,AISI321 |
| 2 | BELLOWS | St 37.2,AISI304,AISI316,AISI321 |
| 3 | LINER | AISI304,AISI316,AISI321 |
| 4 | FLANGE | St 37.2,AISI304,AISI316,AISI321 |
| SIZE | PRESSURE PN16 |
EXPANSION L mm | d mm | d1 mm | N-Ø | EFECTIVE AREA cm² |
||
| 30 mm( cm² -20+10) | 60 mm(-40+20) |
90 mm(-70+20) | ||||||
| DN25 | 16 | 315 | 335 | 560 | 115 | 85 | 14*4 | 54 |
| DN32 | 16 | 325 | 445 | 570 | 140 | 100 | 18*4 | 54 |
| DN40 | 16 | 335 | 455 | 575 | 150 | 110 | 18*4 | 54 |
| DN50 | 16 | 340 | 460 | 595 | 165 | 125 | 18*4 | 89 |
| DN65 | 16 | 355 | 470 | 600 | 185 | 145 | 18*4 | 91 |
| DN80 | 16 | 355 | 475 | 625 | 200 | 160 | 18*4 | 141 |
| DN100 | 16 | 360 | 490 | 625 | 220 | 180 | 18*4 | 196 |
| DN125 | 16 | 375 | 505 | 625 | 250 | 210 | 18*4 | 272 |
| DN150 | 16 | 385 | 515 | 625 | 285 | 240 | 22*8 | 346 |
| DN200 | 16 | 435 | 560 | 725 | 340 | 295 | 22*12 | 572 |
| DN250 | 16 | 460 | 625 | 800 | 405 | 355 | 26*12 | 829 |
NST-DBK