Edge-welded bellows are precision-engineered expansion elements constructed by welding together thin metal diaphragms along their edges. This design enables exceptional flexibility, low spring rates, and compact geometry, making them ideal for environments where precise motion control, vacuum integrity, and high cycle life are critical. Commonly used in aerospace, semiconductor, medical, and ultra-high vacuum systems, edge-welded bellows provide reliable performance where traditional formed bellows may not suffice.
Hanovix specializes in custom-manufactured edge-welded bellows tailored to your application’s motion, pressure, and space constraints — with a focus on clean design, consistent quality, and engineering reliability.
Designed to accommodate linear motion along the central axis, axial bellows are ideal for applications requiring precise expansion and contraction in compact assemblies. They offer long cycle life and excellent vacuum integrity.
Design Specifications:
Motion type: Axial compression and extension
Travel range: Up to 50 mm (customized per design)
Cycle life: Over 1 million cycles depending on stroke and pressure
Leak rate: ≤ 1×10⁻⁹ mbar·l/s (helium)
Materials: Stainless steel, Inconel, HastelloyEnd connections:
Flanged, weld ring, threaded, or custom options
Engineered to absorb angular deflection between components, these bellows are used in assemblies where precise angular movement or misalignment tolerance is required.
Design Specifications:Motion type: Angular deflection
Deflection angle: Up to ±15°, depending on diameter and thickness
Cycle life: Over 500,000 cycles at full deflection
Leak rate: ≤ 1×10⁻⁹ mbar·l/s
Materials: Stainless steel, high-nickel alloys
Mounting interface: Circular or rectangular flange plates available
Designed to accommodate offset displacement perpendicular to the axis, lateral bellows are ideal for multi-axis alignment and dynamic vibration absorption systems.
Design Specifications:
Motion type: Lateral movement
Offset range: Up to 10 mm (based on diaphragm geometry)
Cycle life: Typically over 500,000 cycles
Leak rate: ≤ 1×10⁻⁹ mbar·l/s
Materials: 304L, 316L, Inconel, AM350
Mounting: Custom flanged or modular design for compact systems
Designed to absorb rotational stress along the longitudinal axis, torsional bellows are used where limited angular torque motion is required within a sealed system.
Design Specifications:
Motion type: Torsional displacement
Rotation range: Up to ±5°
Cycle life: 250,000–500,000 cycles depending on torque load
Leak rate: ≤ 1×10⁻⁹ mbar·l/s
Materials: Welded metal diaphragms – stainless or alloy
Interface options: Custom torque-transfer mounts or shaft couplings
Hanovix edge-welded bellows are designed to meet the highest standards of motion precision, vacuum performance, and structural reliability. With custom options for axial, angular, lateral, and torsional movement, our bellows are engineered to perform in complex, space-constrained systems requiring long cycle life and ultra-low leakage. Supported by in-house manufacturing and testing capabilities, we deliver consistent quality and application-specific flexibility for your most critical assemblies.
Transforms pressure energy into precise movements or forces. Pressure can be applied either internally within the bellows or externally within a cup-shaped structure, with the external method generally preferred. When protection against overload is necessary, a floating head equipped with a limit stop is commonly employed.
Functions as a sealing device for joints or mechanical components like levers and linkages that undergo movement. It prevents leakage, particularly in scenarios where mechanical motion needs to pass through an enclosure wall. The pivot point labeled as "P" indicates the optimal location for rotation.
A specialized pressure motor, consisting of a bellows unit where one internal side is evacuated to establish a stable reference pressure. Variations in pressure on the opposite side are measured against this fixed reference, generating a predictable mechanical movement or stroke. Typically, a control spring is integrated to manage stroke rates, along with a mechanical stop to limit movement and prevent damage due to excessive displacement from the atmospheric pressure difference.
Designed to accommodate expansions caused by thermal or pressure changes. When equipped with appropriate end fittings, it can function as a storage reservoir for liquids or gases. Typical applications include serving as an oil reservoir in electrical cable joints and as thermal expansion compensators in oil-filled transformers.
Function similarly to pressure motors but utilize a sealed, temperature-sensitive liquid or gas as the pressure source. The thermal stimulus can either act directly on the bellows element or be detected remotely through a sensing bulb connected via flexible tubing. These motors are extensively used to actuate valves, switches, and other devices in response to temperature fluctuations.
Involves two bellows units connected by a tube, enabling hydraulic transfer of motion or force. When the system is completely filled with fluid, any linear movement in one bellows is immediately and equally transferred to the other. To safeguard against overload, both bellows are typically equipped with mechanical stops.
Designed with a packless and leak-free structure to accommodate thermal expansion in pipelines that transport steam, water, and other fluids. They can also serve to absorb vibrations or create flexible connections within the piping system.
A packless valve design, which eliminates the need for traditional packing materials. This sealing method is commonly applied to control or contain steam movement or adjustments in various types of equipment.
