Markets & Applications


Fulton Bellows works with numerous semiconductor applications, providing cutting-edge bellows that are essential for critical processes. Our meticulously designed and expertly crafted bellows play a pivotal role in semiconductor manufacturing, offering unrivaled performance and reliability in the most demanding circumstances.


When it comes to pressure regulation, actuation, and flow monitoring, Fulton Bellows products can be trusted for reliable and robust performance, even in the most challenging operating conditions.

Our bellows are indispensable in protecting expensive batch processes from over-temperatures or pressures. With utmost precision, they make critical decisions in safety processes, ensuring the well-being of your valuable equipment and personnel. Furthermore, our bellows optimize chemical reactions by seamlessly opening and closing fluid regulation systems, regardless of the chemical being processed or the pressures surrounding them.

At Fulton Bellows, we understand the diverse needs of the semiconductor industry. Our bellows are designed to adapt to various applications and chemical environments. Whether it’s controlling gases, managing pressure differentials, or maintaining tight seals, our bellows provide the reliability and flexibility needed to optimize semiconductor manufacturing.

With a proven track record and an unwavering commitment to excellence, Fulton Bellows is the trusted partner for semiconductor manufacturers worldwide. Our dedication to precision engineering and superior performance has earned us the trust of industry leaders.

Basic and Common Applications

Shaft Seal

Prevents leakage around a revolving shaft. Spring pressure holds nose of seal against shoulder on shaft. Another type rotates with shaft and seals against a stationary plate.

Pressure Motors

Convert pressure effects into controlled movement or force. Pressure may be applied inside the bellows or outside the bellows in a cup structure, the latter being preferred. The floating head is usually provided with a limit stop when overload protection is needed.

Flexible Joint

Provides a means to seal a flexible joint or mechanical movement of levers, linkage, etc. against leakage where the movement must be conveyed outside enclosure. “P” optimum position of pivot.

Aneroid Assemblies

An aneroid assembly is a pressure motor where one side of a bellows assembly (inside the assembly illustrated) is evacuated to form a constant reference pressure against which the changing pressure on the other side is measured and used to produce predictable stroke. A spring for rate control and a stop to prevent excessive stroke from the resulting one atmosphere pressure differential usually are required.

Expansion Chamber

This type of assembly is employed to absorb thermal or pressure expansion. With suitable heads, it may be used as a reservoir for a liquid or gas. Examples: Oil reservoir for electrical cable joint and thermal expansion compensators on oil-filled transformers.

Thermostatic Motors

Similar to pressure motors. Pressure supplied by a sealed fill of thermo-sensitive liquid or gas. Thermal effect may be received either on the bellows element direct or at a remote bulb for transmission through flexible tubing. Widely used to operate valves, switches, etc., in response to temperature changes.

Remote Transmission

Two bellows assemblies joined by a tube for hydraulic transmission of motion or power. With bellows system solid filled, linear motion of one bellows is transmitted instantly and in equal degree to remote bellows, both bellows being provided with limit stops when overload protection is needed.

Expansion Joints

Packless and leakless construction is used to absorb thermal expansion of pipe lines carrying steam, water, etc., or, to absorb vibration or provide a flexible connection.

Packless Construction

Diagram illustrates packless valve construction. Same principle is used to seal steam movement or adjustment in many types of apparatus.