Rubber Air Bladders for Air-Expanding Shafts
GRFFN rubber air bladders are flexible inflatable tubes used inside air-expanding shafts. When compressed air enters the bladder, it expands radially and pushes the shaft keys outward to grip a roll core. After pressure is released, the bladder returns quickly so rolls can be changed with less handling time.
Key Features
- High elasticity for repeated inflation and deflation cycles
- Pressure- and tear-resistant construction for industrial winding systems
- Reliable airtightness when the tube, fittings and working pressure are correctly matched
- Neoprene rubber construction with useful resistance to industrial oils and mild acid or alkali exposure; compatibility must be checked for the actual medium
- Custom lengths and size combinations for replacement and OEM projects
Technical Parameters
| Material | Neoprene rubber; alternative compounds available after application review |
|---|---|
| Standard Color | Black |
| Typical Working Pressure | 0.3-0.8 MPa, subject to size, fittings and operating conditions |
| Expansion | Radial |
| Length | Cut to customer requirement |
| Working Medium | Compressed air |
| Typical Equipment | Printing, papermaking, textile, converting and packaging machinery |
Available Size Range
Documented ID x OD combinations in millimetres include: 6 x 10, 7 x 12, 8 x 12, 9 x 13, 11 x 17, 13 x 19, 13 x 20, 16 x 26, 19 x 29, 20 x 30, 22 x 32, 25 x 35, 28 x 38, 30 x 40, 32 x 42, 34 x 44, 38 x 48, 40 x 50, 42 x 52, 45 x 55, 50 x 60, 51 x 61, 57 x 67, 60 x 70, 64 x 74, 70 x 80, 76 x 86, 89 x 100, 95 x 105, 102 x 112, 102 x 114, 108 x 120, 114 x 126, 127 x 140, 140 x 152, 152 x 162, 152 x 164, 155 x 165, 159 x 170, 160 x 172, 180 x 192, 195 x 206, 203 x 215 and 219 x 230. Other dimensions can be evaluated from a drawing or sample.
Information Needed for a Quote
Please provide the bladder ID, OD or cross-section, total length, connection style, operating pressure, medium, cycle frequency and machine model. A used sample or dimensional drawing helps confirm replacement compatibility.
