- NK-6500
- NK-6800
- NK-7000／NK-7100
- NK-7300／NK-7300E
- NK-7400
- NK-7500／NK-7600
／NK-7700 - NK-7800
- NK-7900／NK-7900E
- NK-8900
- NK-9000（Single）
- NK-14000
- D-FLEX
- F-FLEX
Bellows Expansion Joint
Bellows model
NK-7500 External cylinder type Bellows Expansion Joint
| Number | Name | Material |
|---|---|---|
| 1 | Bellows | SS400,SUS304,316,316L |
| 2 | End Pipe | SGP,STPG370,SUS304,SUS316,SUS316L |
| 3 | Flange | SS400,S25C,SUS304,SUS316,SUS316L |
| 4 | Ring | SS400,SUS304,SUS316,SUS316L |
| 5 | Neck Ring | SS400,SUS304,SUS316,SUS316L |
| 6 | Internal Cylinder | SUS304,SUS316,SUS316L |
| 7 | External Cylinder | SGP ,SUS304 |
| 8 | Holder | SS400,SUS304 |
| 9 | Tie Rod Bolt | SS400,SUS304 |
Features
Bellows body is tightly gripped by external and internal cylinders.
NK-7500 slides smoothly along along its axis in case differential expanding motion
happens. It is supported by the external cylinder so that the bellows can be kept
safely from back ring caused by pressure.
This is suitable to low / middle / high pressures occasions and embedded plumbing.
Bellows model
NK-7600 External Cylinder type Bellows Expansion Joint W-model
| Number | Name | Material |
|---|---|---|
| 1 | Bellows | SUS304,SUS316,SUS316L |
| 2 | End Pipe | SGP,STPG370,SUS304,SUS316,SUS316L |
| 3 | Flange | SS400,S25C,SUS304,SUS316,SUS316L |
| 4 | Internal Cylinder | SUS304,SUS316,SUS316L |
| 5 | Intermediate Pipe | SGP,STPG370,SUS304,SUS316,SUS316L |
| 6 | Neck Ring | SS400,SUS304 |
| 7 | External Cylinder | SGP ,SUS304 |
| 8 | Holder | SS400,SUS304 |
| 9 | Holder | SS400,SUS304 |
| 10 | Tie Rod Bolt | SS400,SUS304 |
| 11 | Ring | SS400,SUS304 |
Features
NK-7600 Bellows model is based on NK-7500, equipped with intermediate pipes
and external cylinders on both left and right sides, which enforce the absorbing
capacity of expansion-contraction.
Bellows model
NK-7700 External Cylinder type Bellows Expansion Joint
| Number | Name | Material |
|---|---|---|
| 1 | Bellows | SUS304,316,316L |
| 2 | End Pipe | SGP,STPG370,SUS304,316,316L |
| 3 | Flange | SS400,S25C,SUS304,316,316L |
| 4 | Internal Cylinder | SUS304,SUS316,SUS316L |
| 5 | Ring | SS400,SUS304 |
| 6 | Neck Ring | SS400,SUS304 |
| 7 | External Cylinder | SGP,SUS304 |
| 8 | Suppotive Ring | SS400,SUS304 |
| 9 | Holder | SS400,SUS304 |
| 10 | Tie Rod Bolt | SS400,SUS304 |
Features
NK-7700 model is based on NK-7600,removed the intermediate pipe and simplified in structure.
This is equipped with inserted intermediate ring, attached to the external cylinder by welding,
corresponding to duplex differential motions. The intermediate anchor chock installed under the
external cylinder. Recommendable for plumbings with small caliber.
