Bellows are widely used across a piling pipe, fluid handling and sensing applications. There’s a commonly used acronym, “STEP” that refers to the four main categories where welded bellows are used: sealing, temperature, evacuation and pressure. Bellows also perform differently under various types of load, so it is important to look closely at the design and materials when making your choice.
A Purposeful Fit
A special combination of piston-like and spring-like action, bellows can convert pressure changes into applied force and also redirect applied force reactively. Welded bellows will exhibit a particular balance depending on the materials and construction method used in their making. Each kind has its most suitable purpose, and there are factors to consider that will put you on the right path to choosing the right component for your project.
Welded Bellows in Use
During their use, welded bellows create a flexible connection and seal, perfect for expansion joints and electrical interrupters. Temperature changes cause contraction and expansion of the bellows, making them useful for control valves and temperature switches. Also reactive to changes in altitude, bellows can adjust fuel to air mixtures. In pressurized uses, bellows respond in a linear way, making them useful in pressure switches and gauges.
Durability
Circular or rectangular welded bellows, when manufactured to the highest specifications and fit to the correct purpose will offer extensive durability in the long term. Over 1,000,000 cycles is a common benchmark for bellows of high quality.
