Pfeiffer Vacuum ATH 1600–3200M & ATP 2300M Full-Magnetic Levitation Turbomolecular Pumps

Overview

The Pfeiffer Vacuum ATH 1600–3200M and ATP 2300M series represent the industrial benchmark in full-magnetic levitation turbomolecular pumping technology. Engineered for ultra-high vacuum (UHV) and extreme high-vacuum (XHV) environments, these pumps operate on the principle of momentum transfer via high-speed rotating turbine blades—typically spinning at up to 90,000 rpm—to impart directional kinetic energy to gas molecules, thereby achieving continuous gas compression from forevacuum to base pressure regimes. Unlike hybrid bearing systems, the ATH and ATP models feature a fully active 5-axis magnetic bearing architecture with real-time rotor position monitoring and dynamic displacement correction. This eliminates mechanical contact, wear, and lubrication requirements—ensuring oil-free, vibration-minimized operation essential for sensitive applications such as surface science instrumentation, electron microscopy, and residual gas analysis. The design conforms to ISO 21028-1 (safety requirements for vacuum pumps) and supports integration into systems requiring compliance with ISO/IEC 17025, FDA 21 CFR Part 11 (when paired with validated control software), and semiconductor-grade cleanroom protocols.

Key Features

• Full magnetic levitation with closed-loop 5-axis position control ensures zero-contact rotor suspension, eliminating bearing wear and extending service life beyond 100,000 operational hours.
• Integrated heating (MT variants) combined with water cooling maintains stable thermal equilibrium (max. 75 °C), minimizing condensation of process vapors—including silanes, metal organics, and halogenated compounds—common in CVD, PVD, and plasma etch tools.
• Oil-free operation guarantees contamination-free vacuum environments, critical for analytical instrumentation (e.g., mass spectrometers, XPS, AES) and thin-film deposition where hydrocarbon backstreaming must be avoided.
• Low acoustic emission (< 45 dB[A] at 1 m) and sub-micron vibration amplitude enable installation adjacent to interferometers, cryostats, and atomic force microscopes without signal interference.
• Flexible mounting orientation (0–360°) accommodates space-constrained UHV chambers and multiport vacuum manifolds without performance degradation.
• DN 250 and DN 320 conflat-compatible inlet flanges support standardized integration with Pfeiffer’s HiPace and Duo series backing pumps, as well as third-party dry scroll and diaphragm forepumps.

Sample Compatibility & Compliance

These turbomolecular pumps are compatible with inert, reactive, and mildly corrosive gases—including N₂, He, H₂, Ar, O₂, and CF₄—within specified compression ratio limits (>1×10⁸ for N₂). They are not rated for continuous exposure to solvents, ammonia, or highly polymerizing monomers unless operated with heated inlet stages and appropriate foreline traps. All ATH/ATP models meet CE marking requirements under the EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. For regulated manufacturing environments (e.g., semiconductor fabs or pharmaceutical R&D), documentation packages include traceable calibration certificates, material declarations (RoHS/REACH), and FAT/SAT test reports aligned with ISO 9001:2015 quality management systems.

Software & Data Management

Pfeiffer Vacuum’s TPU Control Suite (v5.x+) provides native USB/RS-485/Ethernet interface support for remote pump parameterization, real-time telemetry (rotor speed, bearing currents, temperature gradients, vibration spectra), and event logging. Audit trails comply with FDA 21 CFR Part 11 when deployed with electronic signature-enabled host systems. Pump status data—including cumulative runtime, thermal cycling history, and magnetic bearing health metrics—can be exported in CSV or OPC UA format for integration into MES or SCADA platforms. Firmware updates are digitally signed and version-locked to prevent unauthorized modification, supporting GxP-aligned validation protocols.

Applications

• Semiconductor manufacturing: Load-lock evacuation, ion implantation beamlines, and ALD/CVD process chambers requiring rapid pump-down and low partial pressure of light gases.
• Surface analysis: X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), and secondary ion mass spectrometry (SIMS) systems demanding ultra-clean, vibration-isolated vacuum environments.
• Research accelerators & fusion diagnostics: Beamline vacuum maintenance and neutral particle analyzers operating below 1×10⁻⁸ hPa.
• Space simulation: Thermal vacuum chambers requiring long-term stability, low outgassing, and immunity to gravitational orientation changes.
• High-energy physics detectors: Time-projection chambers (TPCs) and cryogenic dark matter experiments where radiolytic cleanliness and electromagnetic silence are mandatory.

FAQ

What is the difference between ATH and ATP series?
The ATH series features standard magnetic levitation with optional integrated heating (MT suffix); the ATP 2300M is a compact variant optimized for high-throughput industrial tools, offering identical bearing architecture but with enhanced thermal management for cyclic duty profiles.
Can these pumps operate without a backing pump?
No—they require a forevacuum of ≤ 2.9 hPa (ATH) or ≤ 2.1 hPa (ATP) to initiate and sustain rotation; Pfeiffer Duo series rotary vane or ACP series dry screw pumps are recommended for optimal staging.
Is water cooling mandatory?
Yes for continuous operation above 70% nominal speed or in ambient temperatures exceeding 35 °C; MT variants integrate both water cooling and resistive heating for active thermal stabilization.
Do these pumps support vacuum interlocks and safety shutdowns?
Yes—integrated I/O ports support hardwired emergency stop, overtemperature cutoff, and forepressure interlock signals compliant with ISO 13850 and EN 60204-1.
What maintenance intervals are required?
Zero scheduled maintenance under normal operating conditions; annual verification of magnetic bearing calibration and cooling circuit integrity is recommended per Pfeiffer’s Preventive Maintenance Guide (Doc. No. PM-ATH-EN-Rev.4).