DRETOP RZ-150 Dry Screw-Type Roots Vacuum Pump

Overview

The DRETOP RZ-150 is a high-capacity, oil-free dry screw-type Roots vacuum pump engineered for demanding industrial and research vacuum applications requiring clean, stable, and corrosion-resistant operation. Unlike conventional oil-sealed rotary vane or liquid-ring pumps, the RZ-150 employs a synchronized dual-screw rotor architecture with precise gap sealing and water-cooled housing to achieve continuous, hydrocarbon-free evacuation across a wide pressure range—from atmospheric pressure down to 0.75 Pa. Its operational principle relies on positive displacement via counter-rotating, non-contacting helical rotors with variable-pitch geometry, enabling efficient compression of condensable vapors (e.g., water, solvents), mildly corrosive gases (e.g., HCl, NH₃), and particulate-laden process streams without internal lubrication or oil degradation. This makes it particularly suitable as a primary or booster pump in hybrid vacuum systems—often paired with dry screw forepumps or turbomolecular pumps—to support high-throughput processes such as vacuum drying, thin-film deposition, thermal processing, and semiconductor chamber evacuation.

Key Features

• Water-cooled thermal management system eliminates airborne particulate dispersion from fan-driven air cooling, critical for cleanroom-compatible installations and low-vibration environments.
• Fully oil-free operation ensures zero hydrocarbon backstreaming—essential for ultra-high-purity processes in pharmaceutical lyophilization, optical coating, and battery electrode drying where organic contamination compromises product integrity.
• Corrosion-resistant rotor and housing surface treatments—including optional PTFE or Hastelloy® C-276 coatings—enable long-term stability when handling aggressive media including halogenated compounds, acidic vapors, and alkaline condensates.
• Optimized multi-stage rotor balance and elastomeric vibration isolation reduce operational noise to ≤68 dB(A) at 1 m and mechanical vibration amplitude to <2.5 µm RMS—meeting ISO 10816-3 Class A criteria for laboratory-grade equipment.
• Integrated nitrogen purge interface (6 mm quick-connect, 1.5–2 bar supply) prevents particle accumulation in the pumping chamber, extending mean time between maintenance (MTBM) by up to 3× compared to non-purged configurations in silicon wafer or graphite powder handling applications.
• Energy-efficient design features optimized screw meshing efficiency and optional variable-frequency drive (VFD) integration, reducing power consumption by 18–22% versus fixed-speed equivalents under partial-load conditions per IEC 61800-9 standards.

Sample Compatibility & Compliance

The RZ-150 is validated for use with chemically heterogeneous gas loads containing up to 85% water vapor by volume, sub-micron particulates (<10 µm), and trace concentrations of H₂S, SO₂, Cl₂, and HF—provided appropriate inlet filtration and condensate separation are implemented upstream. It complies with ISO 21809-3 (offshore pipeline coating vacuum systems), ASTM F2436 (vacuum integrity testing of sealed enclosures), and EU Regulation (EC) No 1907/2006 (REACH) for material declarations. All electrical components meet CE requirements under EN 60204-1 (safety of machinery), and the pump housing conforms to IP54 ingress protection rating when equipped with optional sheet-metal enclosure. For GMP/GLP-regulated environments, optional PLC-integrated data logging supports audit-ready vacuum history records compliant with FDA 21 CFR Part 11 Annex 11 requirements.

Software & Data Management

While the base RZ-150 operates via hardwired start/stop and analog pressure feedback, optional PLC integration enables full digital supervision through Modbus RTU over RS485. The control interface supports real-time monitoring of inlet pressure (via integrated Pirani/Penning gauge input), motor current draw, coolant flow rate (with optional flow sensor), and thermal sensor outputs from stator and bearing housings. Logged parameters are timestamped and exportable in CSV format for trend analysis. Firmware updates follow IEC 62443-2-4 secure update protocols, and configuration changes require role-based authentication to satisfy ISO/IEC 27001-aligned cybersecurity policies in regulated manufacturing settings.

Applications

• Vacuum metallurgy: Continuous annealing, sintering, and vacuum brazing of aerospace alloys (e.g., Ti-6Al-4V, Inconel 718) under oxygen-free conditions.
• Pharmaceutical manufacturing: Freeze-drying (lyophilization) cycle support, solvent recovery during API crystallization, and sterile barrier packaging line evacuation.
• Semiconductor fabrication: Load-lock and transfer chamber evacuation prior to PVD/CVD processing; compatible with Si, GaAs, and compound semiconductor wafer handling.
• Research infrastructure: High-vacuum pre-pumping for electron microscopy chambers, synchrotron beamline end-stations, and plasma physics experiments requiring rapid pump-down from atmosphere to ≤1 Pa.
• Green chemistry: Solvent-free distillation, molecular distillation of heat-sensitive nutraceuticals, and catalytic hydrogenation under inert vacuum.

FAQ

Can the RZ-150 operate continuously at ultimate pressure (0.75 Pa)?
Yes—the pump is rated for continuous duty at its ultimate pressure when paired with an appropriate forepump capable of maintaining ≤10 Pa at the RZ-150’s exhaust port.
Is nitrogen purge mandatory for standard operation?
No—nitrogen purge is an optional feature recommended only for applications involving >5 mg/m³ particulate loading or frequent process upsets generating condensable aerosols.
What forepump compatibility is required?
A dry screw or diaphragm forepump with ≥10 m³/h capacity and ≤10 Pa ultimate pressure is recommended; oil-sealed pumps may be used if equipped with effective hydrocarbon traps.
Does the RZ-150 support vacuum level feedback control?
Yes—when integrated with optional PLC and external vacuum gauges, it supports closed-loop pressure regulation via VFD modulation within ±0.5% setpoint accuracy.
Are spare parts and service documentation available internationally?
Yes—DRETOP provides English-language technical manuals, certified calibration certificates, and globally distributed spare rotor kits, seal assemblies, and cooling manifolds under ISO 9001-certified logistics channels.