4-Convolution Flex Bellows DN10-D16-L13.6

The 4-Convolution Flex Bellows DN10-D16-L13.6 (4-wave flexible bellows, nominal diameter DN10, outer diameter D16, length L13.6) is a precision, miniature, highly flexible, and compact metal bellows. Its core advantages lie in four key areas: adaptation to confined spaces, precise compensation, high reliability, and long service life. It is ideally suited for precision instruments, medical equipment, semiconductors, aerospace, and other high-end applications.

I. Structural and Dimensional Advantages: Extremely Compact, Suitable for Micro-Spaces
Ultra-compact design (DN10 / D16 / L13.6)
Miniaturization: With an inner diameter of just DN10 (≈10 mm), an outer diameter of D16 (≈16 mm), and a total length of 13.6 mm, this product represents one of the smallest specifications in the industry, specifically tailored for extremely narrow internal spaces and tight clearances between precision components.
Space-Saving: Over 60% smaller in volume compared to standard components with equivalent functionality; does not occupy the main chamber of the equipment, and integrates seamlessly into precision valves, sensors, pump bodies, and micro-tubing.
4-Convolution Optimized Structure
Balance of Flexibility and Rigidity: Four corrugated units provide greater flexibility and higher compensation capacity than 2- or 3-convolution designs; more stable and capable of withstanding higher pressures than 5-6-wave structures, preventing instability caused by excessive flexibility.
High Compensation in a Compact Design: With a total length of only 13.6 mm, it effectively absorbs axial expansion, radial displacement, angular deflection, and equipment vibration, resolving thermal expansion and contraction issues as well as installation deviations in precision systems.
II. Performance Advantages: High Reliability, Long Service Life, and Resistance to Harsh Environments
Exceptional Flexibility and Compensation Capability
Multi-directional displacement compensation: A single section can simultaneously accommodate four types of displacement—axial, lateral, angular, and vibration—reducing the system’s reliance on multiple joints and minimizing potential leakage points.
Low reaction force: Minimal forming stress in the bellows results in extremely low thrust requirements for deflection and expansion, ensuring no interference with the positioning accuracy of precision valve stems, sensor probes, or micro-motion mechanisms.
High Strength and Long Fatigue Life
Thin-walled precision forming (typically 316L/304 stainless steel): Hydraulic/electrochemical forming ensures uniform wall thickness and zero residual stress, providing resistance to fatigue cracking and repeated bending.
4-wave structure lifespan advantage: Under high-frequency pulsation and thermal cycling conditions, the fatigue life is 2–3 times that of single-layer short-wave designs made from the same material, making it suitable for long-term maintenance-free operation.
Temperature, Pressure, and Corrosion Resistance
Metal materials (stainless steel/alloys): Withstands a wide temperature range of **-200°C to 600°C**, suitable for low-temperature refrigeration, high-temperature heat transfer, steam, and hot oil systems.
Pressure Stability: Micro-thick-walled design with pressure resistance up to 1.6–6.4 MPa (depending on material), meeting the demands of micro-hydraulic, pneumatic, and vacuum systems.
Corrosion Resistance: Materials such as 316L and Hastelloy resist acids, alkalis, salt spray, and oxidation, making them suitable for chemical, medical, seawater, and semiconductor cleanroom environments.
Zero-Leak Sealing
Seamless Welding / Molding: Adhesive-free and filler-free sealing, with helium leak testing achieving a leak rate of 1×10⁻⁹ Pa·m³/s, suitable for applications requiring zero leakage, such as high-purity gases, vacuum systems, medical fluids, and semiconductor processes.

III. Engineering Application Advantages: Easy Installation, High Compatibility, Low Maintenance Costs
Easy to install and neutral-friendly
Short overall length (13.6 mm): Takes up minimal axial space during installation and is compatible with various connection methods, including quick-connect, welding, threaded, and clamp connections.
Automatic Alignment: Compensates for installation errors of ±0.5–1 mm and thermal expansion/contraction shifts in equipment, reducing assembly precision requirements and minimizing rework.
Lightweight and Vibration-Resistant
Extremely lightweight (≈a few grams): Does not increase the load on precision equipment and does not affect dynamic balance or sensor sensitivity.
High-Efficiency Vibration Damping and Noise Reduction: Absorbs mechanical vibrations and fluid pulsations, reduces overall system noise, and protects precision bearings, circuit boards, and sensor components.
Maintenance-Free and Long-Term Stability
All-Metal Construction: Eliminates issues related to rubber or plastic aging and embrittlement; service life of 5–10+ years, significantly reducing maintenance, replacement, and downtime costs.
IV. Typical Application Scenarios (Highlighting Key Benefits)
Precision Instruments: Spectrometers, chromatographs, medical analyzers, sensor connections
Semiconductors / Vacuum: Vacuum valves, vacuum pumps, semiconductor process piping, high-purity gas lines
Medical Equipment: Ventilators, anesthesia machines, micro-pumps, interventional devices, cryosurgical systems
Aerospace / Defense: Airborne hydraulics, satellite thermal control, missile servo mechanisms, precision valve assemblies
Automotive / New Energy: Fuel cell gas lines, hydrogen energy pipelines, in-vehicle sensors, precision actuators
Summary: Core Value in One Sentence
The 4-Convolution DN10-D16-L13.6 is the benchmark for miniature bellows, offering “compact size, large displacement compensation, high reliability, and zero leakage.” In environments with extreme space constraints, precise dynamics, and harsh conditions, it integrates “flexible connection + displacement compensation + vibration-damping sealing” into a single solution, significantly enhancing system stability, service life, and integration.