What are the Different Types of Bellows?

The term bellows is synonymous with leather bellows, which have been used for centuries to blow air into fireplaces. Bellows are now an essential component of machines used in a variety of industries. These components are also known as flexible covers, convolutions, accordions, and machine way covers. Bellows come in a variety of sizes and shapes and are made of materials ranging from leatherette to metal. What function do they serve? Is there a variety of bellows? To find your answers, read this post.

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What is a Bellows?

Bellows are useful covers that can expand and contract as needed. Instead of being the primary component, they are typically used as protective covers for the machine's primary components. Some exceptions include fireplace and camera bellows, which would not function or exist as we know them without the bellows.

Bellows can be used as heat shields, medical ventilators, light seals for camera optics, linear rail protective covers, ball-screw covers, and dental and surgical table components. Some can keep liquids and gases under pressure while allowing compression and expansion. The key characteristics of a well-made functional cover are the balance of strength versus movement and flexibility. Quality bellows must be customized in terms of design to meet the needs of the application.

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Different Types of Bellows:

5 types of Bellows are listed below depending upon their manufacturing method or technique.

1. Axial Bellows:

This is the simplest and most cost-effective type of bellows. It is capable of absorbing all types of pipeline movements. Axial bellows are the best for lateral and angular movement.

2. Exhaust Bellows:

These bellows are primarily used in diesel engines. Its primary function is to exhaust the air and noise produced by the engines. Exhaust bellows are used in railways and other modes of transportation.

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3. Expansion Bellows:

These bellows are specifically designed to absorb heat generated by expansion in any construction or from the materials used in multiple constructions.

4. Hinged Expansion Bellows:

These bellows are primarily used to absorb thermal expansion or contraction. These bellows are widely used in thermal power plants.

5. Non Metallic Bellows:

Non-Metallic bellows are primarily made of leather, rubber, plastic, canvas, and Rexene. It is unavoidable in the food industry.