AAP NBR rubber bellow, 2-1/2"
Available
This AAP NBR rubber bellow is drilled to Table E. It is supplied in 5 sizes from 2" (50mm) to 6" (150mm). A rubber bellow is a flexible joint moulded in a spherical shape from heat-resisting synthetic elastomer, with metal floating flanges. Installed in a piping system, it absorbs movement in three directions: axial (elongation and compression along the centre line), lateral (offset from the centre line) and angular (bending about the centre line).
The body is NBR, rated -25 to +100 °C, with a nylon cord fabric lining and a hard steel wire frame. Applications: air, compressed air, water, sea water, hot water and weak acid.
Where this product is used
- Absorbing axial, lateral and angular pipe movement
- Flexible connections at pumps and other equipment
- Compressed air, water, sea water and hot water lines
- Weak acid duties, subject to chemical resistance
Features
- 5 sizes from 2" (50mm) to 6" (150mm)
- NBR body, -25 to +100 °C
- Flange drilling: AS2129 Table E
- Absorbs axial, lateral and angular movement, with 15° angular deflection on all sizes
- Bursting pressure 6,000 kPa and vacuum rating 86.7 kPa
- Moulded spherical body with nylon cord lining, steel wire frame and metal floating flanges
- NBR resists many hydrocarbons, fats, oils, greases and hydraulic fluids
Key specifications
| Specification | Detail |
|---|---|
| Brand | AAP |
| Product | Rubber bellow (flexible rubber joint) |
| Rubber | Nitrile butadiene rubber (NBR), ASTM D1418-64 designation |
| Flange drilling | AS2129 Table E |
| Construction | Spherical moulded body in heat-resisting synthetic elastomer with a nylon cord fabric lining, a hard steel wire frame and metal floating flanges |
| Temperature range | -25 to +100 °C |
| Bursting pressure | 6,000 kPa |
| Vacuum rating | 86.7 kPa (vacuity) |
| Working pressure | 1,600 kPa for DN32 to DN300 |
| Movements absorbed | Axial compression and elongation, lateral displacement and angular deflection |
| Angular deflection | 15° on all sizes |
| Sizes | 2" (50mm) to 6" (150mm) (5 sizes) |
Choosing the right option
Match the flange drilling to the flanges on your pipework: this bellow is drilled to Table E (AS2129). NBR is not suited to ozone, ketones, esters, aldehydes or chlorinated and nitro hydrocarbons, so choose an EPDM bellow for those duties. Availability on these NBR bellows varies.
Related AAP products: AAP EPDM Rubber Bellow, Table E, AAP NBR Rubber Bellow, ANSI B16.5 Class 150, AAP EPDM Rubber Bellow, Table E x BS4504 PN16, AAP EPDM Rubber Bellow, Table D, 10" (250mm).
| Option | Part number | SKU |
|---|---|---|
| 2" | RB50N | A0081288 |
| 2-1/2" | RB65N | A0081289 |
| 3" | RB80N | A0081290 |
| 4" | RB100N | A0081291 |
| 6" | RB150N | A0081293 |
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AAP NBR Rubber Bellow, Table E: 2-1/2"
SKU: A0081289 | Model: RB65N
AAP RB65N: AAP NBR rubber bellow, 2-1/2". Pipe Size (inch): 2-1/2. Pipe Size (mm): 65. Axial Compression: 13.

