Unison can design and build custom bellows with smooth contours, uniform wall thickness, and greater strength for any application, in any industry.

Custom Designed Precision Components

From high stress oil-extracting equipment to pressure controls on space missions, Unison bellows are custom engineered to perform under stress, shock, vibration and corrosive agents. Our state-of-the-art manufacturing facilities can accommodate prototype, short runs and long-term volume production. We provide intelligent solutions that include theoretical analysis, design, material selection, manufacturing, testing, field evaluation and service.

Typical Thermal Sensing Bellows Performance Characteristics Temperature: –125°F to 350°F (oil filled goes up to 800°F)

Operating Pressures: 200–300 psia internal, 2–22 psia external, 180–300 psia differential, up to 1050 PSIG Max

Response: Less than 6 seconds in agitated liquid baths for 63.3% total stroke

Vibration: Per MIL–E–8595

Liquid Fill Material: Methanol, butyl alcohol, oil

Life: 150,000 cycles

Tight Tolerances in Tight Spaces

Unison bellows are the perfect solution for applications that require utmost precision. Our manufacturing techniques allow us to maintain tight tolerances on critical dimensions, even holding the outer diameter to within a +/- 0.005" margin.

Omega Design

In addition to our conventional bellows, Unison also specializes in Omega Design Bellows. These bellows feature internal or external flat convolutions, offering extreme flexibility and providing greater control and more equalized stress distribution. This unique and economical design is ideal in tough, high-stress applications wher repeatability, reduced hysteresis, constant spring rate, resistance to extreme pressure and longevity are required.