Introduction
1. The main body of the bellows is made of PTFE all-tetrafluorine material, which has extremely high chemical stability and is resistant to most corrosive media;
2. The chemical composition and mechanical properties of stainless steel flanges are in full compliance with national standards;
3. Flanges are all produced by die forging, with fine crystal structure and high strength, and there will be no large or uneven grains, and no hardening cracks;
4. Install a limit rod to protect the PTFE corrugation;
5. Add a compression ring to the bellows to increase the strength of the bellows.
Parameters
| Parameter Information： |
| 1. Executive standard： |
| Name | Design and manufacture | Pressure Test | End Flange |
| Reference standard | GB/T 12777 | GB/T 12777 | GB/T 9113 ASME B16.5 |
| 2. Material of Main Parts: |
| Name | 1-flange | 2-bellow | 3-Compression ring | 4-limit screw |
| Material | 316 | PTFE | 316 | 316 |
| 三、Dimensions： |
| SIZE（150LB） |
| DN | NPS | L | ΦD | ΦK | n-Φd |
| 50 | 2'' | 120 | 150 | 120.5 | 4-18 |
| 65 | 2 1/2'' | 120 | 180 | 139.5 | 4-18 |
| 80 | 3'' | 120 | 190 | 152.5 | 4-18 |
| 100 | 4'' | 120 | 230 | 190.5 | 8-18 |
| 125 | 5'' | 140 | 255 | 216 | 8-22 |
| 150 | 6'' | 140 | 280 | 241.3 | 8-22 |
| 200 | 8'' | 150 | 345 | 298.5 | 8-22 |
| 250 | 10'' | 150 | 405 | 362 | 12-26 |
| 300 | 12'' | 160 | 485 | 431.8 | 12-26 |
| 350 | 14'' | 170 | 535 | 476.3 | 12-29 |
| 400 | 16'' | 170 | 595 | 539.8 | 16-29 |
