2 in (50 mm) NBR Rubber Bellow, ANSI Class 150 | RBA50N
Available
This AAP NBR rubber bellow is drilled to ANSI B16.5 Class 150 (manufacturer-stated). It is supplied in 5 sizes from 2 in (50 mm) to 5 in (125 mm).
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. AAP lists NBR as generally resistant to many hydrocarbons, fats, oils, greases, hydraulic fluids and chemicals, and generally affected or attacked by ozone, ketones, esters, aldehydes, and chlorinated and nitro hydrocarbons. Applications listed by AAP: 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 the chemical resistance listed
Features
- 5 sizes from 2 in (50 mm) to 5 in (125 mm)
- NBR body, -25 to +100 °C
- Flange drilling: ANSI B16.5 Class 150 (manufacturer-stated)
- Absorbs axial, lateral and angular movement, with 15° angular deflection on all sizes
- Bursting pressure 6,000 kPa and vacuum rating 86.7 kPa, per the manufacturer
- 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 (manufacturer-stated) | Nitrile butadiene rubber (NBR), ASTM D1418-64 designation |
| Flange drilling (manufacturer-stated) | ANSI B16.5 Class 150 |
| 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 (listed by AAP as "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 in (50 mm) to 5 in (125 mm) (5 sizes) |
Options and part numbers
| Size | Part number | Length L (mm) | Axial compression (mm) | Axial elongation (mm) | Lateral displacement (mm) | Angular deflection | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 2 in (50 mm) | RBA50N | 105 | 10 | 7 | 10 | 15° | 3 |
| 2-1/2 in (65 mm) | RBA65N | 115 | 13 | 7 | 11 | 15° | 4.1 |
| 3 in (80 mm) | RBA80N | 135 | 15 | 8 | 12 | 15° | 5.2 |
| 4 in (100 mm) | RBA100N | 150 | 19 | 10 | 13 | 15° | 6 |
| 5 in (125 mm) | RBA125N | 165 | 19 | 12 | 14 | 15° | 10.3 |
Selecting the right option
Match the flange drilling to the flanges on your pipework: this bellow is drilled to ANSI B16.5 Class 150 (manufacturer-stated). Check the movement you need to absorb against the table, because AAP lists each movement separately, and contact AIMS if the joint will see more than one movement at once. NBR is not suited to ozone, ketones, esters, aldehydes or chlorinated and nitro hydrocarbons, so choose an EPDM bellow for those duties. If you are not sure what suits, contact AIMS with your pipe size, flange standard, fluid and temperature.
Related products
See also AAP NBR Rubber Bellow, Table E, AAP EPDM Rubber Bellow, Table E, AAP EPDM Rubber Bellow, Table E x BS4504 PN16, AAP EPDM Rubber Bellow, Table D, 10 in (250 mm) and AAP Weld Neck Flange, ANSI B16.5 Class 150.
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2"
Model Number: RBA50N
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2-1/2"
Model Number: RBA65N
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3"
Model Number: RBA80N
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4"
Model Number: RBA100N
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5"
Model Number: RBA125N
