High-precision equipment is easily affected by environmental vibration, which can cause measurement errors or machining defects.In industries like semiconductor, aerospace, and optics, even micro-vibrations can lead to costly product failures. Traditional isolation systems often fail to respond quickly enough.
The SDB diaphragm pneumatic vibration isolator offers ultra-low natural frequency, rapid stabilization, and high vibration attenuation rates, making it ideal for critical precision applications.

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The SDB diaphragm pneumatic vibration isolator delivers 2–3 Hz natural frequency, rapid <1.5 s stabilization, and >99% vibration isolation above 100 Hz. It’s widely used in semiconductor, optics, aerospace, and medical imaging industries.

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Let’s explore its core parameters, features, and applications.

Core Parameters of the SDB Pneumatic Vibration Isolator

The SDB model achieves ultra-low vertical and horizontal natural frequencies of 2–3 Hz (load and base dependent). With a system stabilization time under 1.5 seconds and effective tuning in under 0.5 seconds, it ensures minimal downtime. Equipped with a Casby high-precision regulating valve, it offers ±0.01 mm repeat positioning accuracy. It meets VC-C vibration criteria in compliance with ISO-ANSI standards and operates reliably in temperatures from -57 °C to +60 °C.

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The SDB isolator provides adjustable stiffness and damping, achieving >85% isolation across all frequencies and >99% above 100 Hz, ensuring exceptional vibration control in demanding environments.

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Unlike conventional isolators, SDB units are designed for adaptive performance. They automatically match system pressure within the 0.3–0.6 MPa range, which allows optimal response regardless of load changes. This makes them suitable for facilities where machine weights and configurations vary frequently.

Automatic Leveling System for High Repeatability

SDB isolators incorporate a dual-mode leveling system—inflation mode for overload compensation and pressure relief mode for underload adjustment. This ensures the platform stays perfectly level, even with load shifts.

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Its automatic leveling system achieves millimeter-level repeat positioning with ±0.01 mm accuracy, ensuring consistent measurement results for sensitive equipment.

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In semiconductor lithography or high-precision optical inspection, even slight tilt changes can distort results. The SDB’s dual-mode adjustment maintains perfect alignment, reducing the risk of expensive rework or calibration delays.

Adaptive Vibration Isolation Technology

The SDB series uses nonlinear stiffness compensation technology to automatically adapt isolation performance based on real-time conditions. The system intelligently adjusts air pressure within its working range (0.3–0.6 MPa) to achieve maximum isolation efficiency.

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With adaptive vibration isolation, the SDB isolator maintains stable performance under varying load conditions, ensuring >90% isolation above 50 Hz and >99% above 100 Hz.

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This makes the SDB an excellent choice for facilities where the operational environment changes frequently, such as R&D labs handling multiple prototypes or production lines with flexible tooling.

Application Areas

The SDB diaphragm pneumatic vibration isolator is suitable for:

• Precision measurement equipment (e.g., laser interferometers)

• Optical inspection systems (e.g., photolithography machines)

• Medical imaging equipment (e.g., MRI systems)

• Nanofabrication tools

• High-precision CNC machine tools

• Aerospace and defense equipment

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From nanotechnology to medical diagnostics, the SDB vibration isolator protects critical processes from disruptive vibrations, ensuring product quality and measurement accuracy.

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By significantly reducing environmental vibration influence, it helps manufacturers meet tighter tolerances, comply with strict quality standards, and reduce costly downtime due to rework or recalibration.

Summary
The SDB diaphragm pneumatic vibration isolator offers ultra-low frequency isolation, rapid stabilization, and adaptive performance—ideal for the most demanding precision applications.