Materials
- Bellows & Liner Materials
- 304/304L S.S. – General Service
- 316/316L S.S. – Greater Resistance to Chemical Attack
- 321 S.S – High Temperature Service
- Monel – High Resistance to Corrosive Environments
- Inconel 600 – Steam Service Where High Trace Chlorides Are Present
- Inconel 625 – High Strength & Temperatures up to 1800F
- Incoloy 825 – High Temperature and Acidic Service
- Nickel 200* – Good Mechanical Properties & High Resistance to Corrosive Environments
Common Applications
Ammonia Injection, Coal Mill, Condensate Pump, Economizer Hopper, Fly Ash, Oxidation Air Pump, Syphon Seal.
*Items are special order materials and not commonly used.
Styles
Single Style
- Most common configuration
- Absorbs small amounts of axial, lateral, & angular movements
- Exerts pressure thrust
Universal Style
- Absorbs larger lateral movement than single bellows
- Exerts pressure thrust
Hinged Style
- Only absorbs angular movement in one plane
- Hinges restrain pressure thrust
Gimballed Style
- Only absorbs angular movement but in any plane
- Gimbaled mechanism restrains pressure thrust
Pressure Balanced Elbow
- Restrains pressure thrust
- Absorbs small amounts of axial, lateral & angular movements
Universal Pressure Balanced Below
- Restrains pressure thrust
- Absorbs large lateral movements
In-Line Pressure Balanced
- Most complicated style
- Restrains pressure thrust
- Absorbs large lateral movements
