Hachiken, Japan
Hachiken JJ Bellows
Made in Japan
Manufacturer : Hachiken
Model : JJ
A bellows-type rubber joint used where large expansion and contraction is required at low pressure. This product has the least axial reaction force among various rubber joints.
Feature
- Due to the bellows structure, the compressive reaction force in the axial direction is extremely small.
- Unlike general bellows, it is not sewn at all, so it is highly airtight.
The purpose
- Connection of piping with low pressure and large displacement.
- Connection of piping that requires low reaction force such as scales.
Usage
- Connection of vibrating feeders and automatic weighers in powder piping systems
- Blower anti-vibration/sound insulation
- Connection of places that are frequently removed, such as moving hoppers
- Absorption of expansion and contraction caused by the temperature of PVC piping
- Dust cover for cylinder rod
Standard specifications
- Maximum operating temperature : -10 to 60°C
- Maximum working pressure : -20kPa to 0.01MPa
- Flange standard : JIS 5K
- Rubber material : CR
Structure and material
| Part number | Name | Material |
| 1 | Body | CR with Nylon |
| 2 | Reinforcement ring | SUS304 |
| 3 | Reinforcement ring | SUS304 |
| 4 | Flange | SS※ |
| 5 | Rubber seal | CR |
*The standard flange is electrogalvanized.
Dimensions and performance table
* Please contact us separately for sizes from 350A to 1000A.
| Nominal diameter | A. | L. | W. | S. | Mass kg |
| 80A | 89 | 140 | 200 | 75 | 4.1 |
| 100A | 114 | 155 | 220 | 75 | 4.9 |
| 125A | 140 | 180 | 230 | 75 | 6.7 |
| 150A | 165 | 200 | 290 | 100 | 9.2 |
| 200A | 216 | 230 | 320 | 100 | 14 |
| 250A | 267 | 270 | 400 | 120 | 20 |
| 300A | 319 | 300 | 420 | 120 | 22 |
※1. Mass is for JIS 5K flange.
※2. Please contact us for special lengths.
※3. Weight is a guideline.
Option
| Standard | option | |
| Flange | Yes | None |
| Flange structure | Fixed | Loose |
| Flange standard | JIS 10K | Tap water F12, JIS 5K, JPI class 150, etc. |
| Flange material | SS plating | SUS304, SUS316, etc. |
*Please contact us if the rubber material is other than CR.
<Remarks/Precautions>
- If the fluid is liquid and the joint is used in an overhead pipe, the weight of the internal fluid may cause the joint to sag.
- If the product is long, it may protrude sideways when pressurized.
- It is not suitable for slurry-like fluids because the inner surface is also uneven and solids may accumulate.
- Use an inner cylinder (sold separately) as necessary when abrasive fluids pass through.
- Please contact us for non-standard specifications (diameter, length, etc.).
