ISO-K Flexible Hoses SUS316L SUS304 250mm 500mm 750mm 1000mm
ISO-K Compressible Bellows Connections for Vacuum & Thermal Movement Solutions
Product Description
ISO-K Compressible Bellows Connections are high-performance expansion compensators designed specifically for vacuum and low-pressure industrial piping systems. These bellows combine the internationally standardized ISO-K flange interface with a convoluted, axially compressible bellows core. The result is a flexible connection that absorbs thermal expansion, compensates for pipe misalignment, and dampens mechanical vibration—all while maintaining vacuum integrity down to 10⁻⁸ mbar. Manufactured from stainless steel (AISI 304, 316L, or 321), ISO-K Compressible Bellows Connections feature clamp-flange ends that enable rapid tool-free assembly. They are ideal for semiconductor fabrication lines, research vacuum chambers, thin-film coating equipment, and cryogenic transfer systems.
Key Features & Characteristics
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ISO-K Flange Compatibility: Direct connection to all ISO-K flanged ports (DN 10 to DN 200) using standard centering rings and clamps.
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High Axial Compression: Achieves up to 30% of free length in axial travel, absorbing thermal growth without pipe stress.
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Extreme Vacuum Performance: Helium leak-tested to ≤1×10⁻⁹ mbar·L/s for UHV (ultra-high vacuum) systems.
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Wide Temperature Range: Operates from -196°C (liquid nitrogen) to +450°C (continuous duty).
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Lateral & Angular Capability: Accommodates ±5 mm lateral offset and ±15° angular deflection simultaneously.
Advantages Over Rigid Spools & Standard Hoses
Choosing ISO-K Compressible Bellows Connections over rigid spools or standard flexible hoses provides three critical advantages. First, installation speed improves dramatically—ISO-K clamps tighten in seconds without tools, reducing downtime by up to 80% compared to bolted flanges. Second, thermal stress elimination prevents flange leakage and gasket failure in systems with frequent temperature cycling (e.g., bake-out cycles in vacuum furnaces). Third, the compressible design extends component life: where a rigid pipe would transfer movement forces to vacuum chambers or turbopumps, ISO-K bellows absorb that movement, reducing mechanical fatigue failures by an estimated 70%.
Why Choose ISO-K Compressible Bellows Connections?
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Vacuum-Ready: Cleaned and packaged for high-vacuum or UHV service (no particle contamination).
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Tool-Free Assembly: ISO-K clamps and centering rings reduce assembly time and eliminate thread galling.
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Cycle Life: Tested to 20,000 full compression cycles without fatigue failure.
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Custom Lengths: Available from 50 mm to 500 mm compressed length; extended lengths for larger travels.
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Bakeable Design: Withstands 250°C bake-out for vacuum chamber degassing (flange seals replaced separately).
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Cost-Effective: 50% lower installed cost than welded bellows with custom flanges.
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