Markets & Applications


Fulton Bellows diverse range of products finds extensive use across various transportation sectors, including automotive, aerospace, and refrigeration.


Fulton Bellows delivers reliable bellows solutions for the automotive industry. Our expertise in valve seals ensures efficient and leak-free operation in refrigeration units, ensuring optimal cooling and temperature control. Additionally, our pressure sensors/regulators, temperature regulators, and flow regulators contribute to the precise control and performance optimization of automotive systems. From engine management to climate control, Fulton Bellows’ products enhance safety, reliability, and efficiency in the automotive sector.

In the aerospace industry, where performance, safety, and reliability are paramount, our bellows assemblies are utilized in critical aerospace applications, including fuel systems, hydraulic systems, and actuation systems. They provide reliable sealing, pressure regulation, and temperature control, ensuring the smooth operation of aerospace systems. Fulton Bellows’ products meet stringent aerospace standards, contributing to the success of modern aircraft.

Fulton Bellows plays a crucial role in transportation refrigeration units, providing superior valve seals and flexible hermetic couplings. Our valve seals ensure reliable and leak-free operation in refrigeration systems, maintaining precise temperature control for optimal cooling performance. Furthermore, our flexible hermetic couplings offer a reliable and efficient solution for flexible connections, enabling seamless transmission of refrigerants while maintaining hermetic sealing.

Temperature control is essential in transportation applications, and Fulton Bellows’ thermal actuators are designed to excel in this field. Our thermal actuators are utilized in climate control systems, heating and cooling systems, and engine cooling applications across various transportation sectors. By accurately regulating temperature, our thermal actuators optimize comfort, enhance efficiency, and ensure the reliability of transportation systems in diverse environments.

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.