Markets & Applications

Electrical Distribution

At Fulton Bellows, our expertise extends to the realm of electrical distribution applications, where our precision-engineered bellows play a crucial role in various high-voltage switchgear and cell tower installations.

electrical distribution

Fulton Bellows has become a trusted name in the realm of high-voltage switchgear, which includes vacuum circuit interrupters and other circuit breakers/interrupters employing SF6 atmospheres. Our bellows provide flexible coupling that can be hermetically sealed, allowing for the creation of a special environment around the electrical contacts.

In high-voltage applications, it is critical to maintain a controlled environment around the electrical contacts to ensure optimal performance and safety. Our bellows act as a flexible and reliable seal, trapping a specific atmosphere to prevent contamination or ingress of external elements. This hermetically sealed environment facilitates efficient electrical conduction, minimizes the risk of arcing, and enhances the overall reliability of the switchgear.

Fulton’s bellows also find extensive use in cell tower installations, where they serve as expansion couplings with unique capabilities. These bellows are designed to accommodate the expansion and contraction caused by temperature variations while providing essential electrical conductivity and supporting radio frequency (RF) wave transmission.

As cell towers are exposed to changing environmental conditions, including temperature fluctuations, it is crucial to incorporate expansion couplings that can absorb the resulting stress and movement. Our bellows excel in this role, effectively compensating for expansion and contraction while maintaining electrical conductivity.

As the demand for efficient and reliable electrical distribution systems continues to grow, Fulton Bellows remains committed to delivering high-quality solutions.

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.