Pfeiffer OktaLine Dry-Running Roots Vacuum Pump Series

Overview

The Pfeiffer OktaLine series represents a high-performance family of air-cooled, dry-running Roots vacuum pumps engineered for reliable operation in medium- to low-vacuum applications across industrial and scientific environments. Based on the proven principles of positive displacement pumping, the OktaLine utilizes two synchronized, figure-eight rotors rotating in opposite directions within a precisely machined housing. Unlike conventional oil-lubricated rotary vane or screw pumps, the OktaLine employs a magnetically coupled drive system—where torque is transmitted across a hermetic barrier without physical contact—eliminating the risk of oil contamination and enabling true oil-free operation in the gas path. This design ensures zero hydrocarbon backstreaming, making it suitable for processes requiring ultra-clean vacuum conditions, such as thin-film deposition, electron beam welding, and vacuum metallurgy. The integrated overflow valve enables rapid pump-down while preventing thermal overload during high-differential-pressure operation. All OktaLine units are manufactured in Germany under strict ISO 9001 quality management protocols and comply with EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility (EMC) Directive 2014/30/EU.

Key Features

• Air-cooled architecture eliminates dependency on cooling water infrastructure, reducing installation complexity and long-term operational costs.
• Magnetic coupling drive (standard on Okta M models) isolates the motor and bearings from the process gas chamber, ensuring maintenance-free, leak-tight operation with no lubricant migration into the vacuum path.
• High compression ratio combined with an integrated pressure-relief overflow valve allows stable performance across wide inlet pressure ranges—from atmospheric down to ~10⁻² mbar—without external bypass systems.
• Robust cast-iron housing and precision-ground rotors deliver exceptional mechanical stability and vibration damping, supporting continuous duty cycles in demanding production environments.
• ATEX-certified variants (II 2G Ex db IIB T4 Gb / II 2D Ex tb IIIB T135°C Db) are available for Zone 1/21 hazardous areas handling flammable vapors or combustible dusts.
• Integrated thermal protection safeguards against overheating during transient overloads or insufficient cooling airflow.
• Modular design supports flexible configuration: motor-on-pump, motor-off-pump (bare pump), and multi-stage integration with backing pumps (e.g., Pfeiffer DuoLine or HiCube turbomolecular systems).

Sample Compatibility & Compliance

The OktaLine series is compatible with non-corrosive, non-condensable gases and vapors typical in metallurgical degassing, vacuum drying, packaging, space simulation chambers, and industrial leak detection systems. It is not intended for use with aggressive chemicals, solvent vapors, or high concentrations of condensables unless paired with appropriate gas ballast or cold trap accessories. All standard models meet CE marking requirements and conform to relevant parts of ISO 21809 (vacuum technology — terminology), ISO 21360-1 (vacuum pumps — acceptance tests), and EN 61000-6-2/-4 (EMC immunity and emissions). ATEX-certified versions undergo rigorous testing per EN 60079-0, -1, and -7 to ensure safe operation in potentially explosive atmospheres. For regulated industries—including pharmaceutical manufacturing and medical device sterilization—the OktaLine can be validated under GMP/GLP frameworks; audit trails and electronic signatures may be implemented via compatible SCADA or MES interfaces when integrated with Pfeiffer’s TPG300/TPG36x controllers.

Software & Data Management

While the OktaLine operates as a standalone mechanical vacuum component, its performance monitoring and control integration are enabled through optional digital interfaces. Analog 0–10 V or 4–20 mA signals allow real-time feedback of motor current, temperature, and status alarms to PLC-based supervisory systems. When paired with Pfeiffer’s TPG361 or TPG300 vacuum gauges and VACUU·BUS™ fieldbus network, users gain centralized access to pump health diagnostics, runtime logging, and predictive maintenance alerts. Firmware updates and configuration parameters are managed via RS485/Modbus RTU or Ethernet/IP protocols. Full compliance with FDA 21 CFR Part 11 is achievable when deployed within validated automation architectures that enforce user authentication, electronic signatures, and immutable data archiving.

Applications

• Pre-evacuation and roughing stages in high-vacuum systems (e.g., sputtering, CVD, and ALD tools backed by turbomolecular or cryogenic pumps)
• Vacuum metallurgy: degassing of aluminum and steel melts, vacuum arc remelting (VAR), and electron beam melting (EBM)
• Industrial packaging: tray sealing, vacuum thermoforming, and modified atmosphere packaging (MAP)
• Freeze-drying and vacuum drying of pharmaceuticals, foodstuffs, and advanced ceramics
• Space simulation chambers requiring rapid pump-down and stable base pressures in the 10⁻¹–10⁻² mbar range
• Leak detection systems using helium mass spectrometry, where hydrocarbon-free pumping prevents false positives
• Chemical vapor infiltration (CVI) and plasma-enhanced processes demanding clean, dry vacuum environments

FAQ

What distinguishes the Okta M series from standard OktaLine models?
The Okta M variants feature a fully sealed magnetic coupling drive system, eliminating shaft seals and preventing any possibility of oil leakage or process gas ingress into the motor compartment. This design enhances reliability, extends service intervals, and ensures compliance with stringent cleanliness requirements.
Can the OktaLine operate without a backing pump?
No. As a Roots-type booster pump, the OktaLine requires a primary (backing) pump—such as a rotary vane, dry scroll, or liquid ring pump—to maintain its inlet pressure below the critical compression limit (~30–50 mbar depending on model). Operation without a backing pump will result in thermal overload and potential rotor seizure.
Is the OktaLine suitable for pumping corrosive gases?
Standard OktaLine pumps are constructed from grey cast iron and stainless steel fasteners and are rated for inert and mildly reactive gases only. For chlorine, HF, ammonia, or other aggressive media, Pfeiffer offers specialized coatings (e.g., Ni-P plating) and alternative materials upon request—subject to engineering review and application validation.
How often does the OktaLine require maintenance?
Under normal operating conditions and with adequate cooling airflow, routine maintenance is limited to annual inspection of motor bearings and verification of thermal sensor functionality. Magnetic-coupled (Okta M) models eliminate gearbox and seal servicing entirely, resulting in >15,000 hours MTBF (mean time between failures) in continuous-duty applications.
Does Pfeiffer provide remote technical support and spare parts logistics?
Yes. Pfeiffer Vacuum maintains global service hubs with certified field engineers and a just-in-time spare parts distribution network. Remote diagnostics, firmware updates, and application-specific commissioning support are available through authorized partners including Shanghai Boyang Vacuum Technology Co., Ltd., which serves as the official Pfeiffer distributor in mainland China.