DRETOP RZ-150 Roots Vacuum Pump

Overview

The DRETOP RZ-150 Roots vacuum pump is an oil-free, high-speed positive displacement vacuum pump engineered for continuous operation in demanding industrial and research-grade vacuum environments. Based on the classic two-lobe rotary lobe (Roots) principle, it operates without internal lubrication—eliminating oil vapor backstreaming, hydrocarbon contamination, and maintenance associated with oil-sealed mechanical pumps. The RZ-150 functions exclusively as a booster pump and must be paired with a suitable forepump (e.g., dry screw, liquid ring, or diaphragm pump) to achieve its ultimate pressure of 5.6 × 10⁻³ Pa. Its design prioritizes gas handling robustness: the symmetrical, precisely balanced rotors rotate in synchronous counter-rotation with minimal clearance, enabling efficient compression of non-condensable gases, moderate concentrations of water vapor, and particulate-laden streams—provided upstream filtration is applied per application requirements.

Key Features

• Oil-Free Operation: All-wetted surfaces are constructed from precision-machined cast iron with optional corrosion-resistant coatings (e.g., Ni-P, CrN, or ceramic composite), ensuring compatibility with mildly aggressive process gases including chlorine, HCl, HF, and organic solvents—subject to concentration and temperature validation.
• Water-Cooled Thermal Management: Integrated jacketed cooling channels maintain rotor and housing temperatures below 80 °C under full-load conditions, suppressing thermal expansion-induced clearances and preserving pumping efficiency across extended duty cycles.
• Low-Vibration Architecture: Dynamic balancing to ISO 1940 G2.5 grade, combined with dual elastomeric motor mounts and rigid baseplate design, limits operational vibration to <2.5 mm/s RMS—critical for integration near sensitive instrumentation or cleanroom environments.
• Particulate Tolerance: Straight-through flow path and gap-insensitive rotor geometry minimize clogging risk; compatible with inline cyclonic or sintered metal filters for applications involving sub-50 µm particulates (e.g., silicon powder, graphite dust).
• Modular Integration Ready: Standard DN100 KF flanged inlet/outlet ports align with ISO-KF and CF vacuum standards; integrated pressure tap and thermocouple port support PLC-based system monitoring and closed-loop control.

Sample Compatibility & Compliance

The RZ-150 is validated for use with non-explosive, non-toxic gases and vapors within ambient temperature ranges of 5–40 °C and relative humidity ≤80% non-condensing. It is not rated for direct pumping of explosive mixtures, oxygen-enriched atmospheres (>23.5% O₂), or highly polymerizing monomers (e.g., styrene, acrylates) without prior engineering review. Compliance includes CE marking per EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. While not certified to ATEX or IECEx, it may be deployed in Zone 2/22 environments when installed with appropriate barrier sealing and purge protocols. For regulated pharmaceutical or semiconductor applications, the pump supports 21 CFR Part 11-compliant data logging when integrated with DRETOP’s optional PLC controller module (RZ-PLC-2200), providing audit-trail-capable vacuum history, fault logs, and user-access controls.

Software & Data Management

The optional RZ-PLC-2200 control module provides real-time monitoring of inlet pressure (via integrated Pirani + capacitance manometer inputs), motor current, coolant flow rate, and bearing temperature. It enables programmable ramp-up profiles, automatic forepump interlock sequencing, and dynamic speed modulation via 0–10 V analog or Modbus RTU interface. All operational parameters are timestamped and exportable in CSV format; event-driven alarms trigger email/SMS notifications via Ethernet/Wi-Fi gateway. Firmware adheres to IEC 62443-3-3 SL2 security requirements, including encrypted firmware updates and role-based access control (Operator, Technician, Administrator).

Applications

The RZ-150 serves as a high-efficiency booster stage in multi-pump vacuum systems for processes requiring rapid evacuation from atmosphere to high vacuum (10⁰–10⁻³ Pa). Primary use cases include: vacuum metallurgy (sintering, brazing, annealing), physical vapor deposition (PVD) and electron-beam evaporation, freeze-drying (lyophilization) of biopharmaceuticals, solvent recovery in fine chemical synthesis, and vacuum impregnation of composites. In semiconductor manufacturing, it supports ALD/CVD chamber rough pumping and load-lock evacuation where hydrocarbon-free vacuum integrity is mandatory. When configured with nitrogen purge (option N₂-BLAST), it extends service life in lithium-ion battery electrode drying lines handling carbon black or cathode active material dust.

FAQ

Can the RZ-150 operate as a standalone vacuum pump?
No. It requires a forepump capable of reaching ≤100 Pa to prevent rotor overheating and mechanical overload. Typical forepumps include DRETOP DS-50 dry screw or RZP-70 oil-free rotary vane units.
What is the recommended maintenance interval?
Under continuous operation at ≤80% rated speed and clean gas conditions, rotor alignment and bearing inspection are scheduled every 12,000 operating hours; seal replacement is required only after 24,000 hours or if coolant leakage is detected.
Is the pump compatible with aggressive halogenated gases?
Yes—with factory-applied Ni-P electroless nickel coating (standard) or optional CrN PVD coating. Application-specific compatibility testing (per ISO 15547-2) is advised for Cl₂, F₂, or Br₂ at concentrations >100 ppm.
Does the RZ-150 meet ISO 8573-1 Class 0 for oil-free air?
Yes. Independent third-party verification confirms zero detectable hydrocarbon content (<0.01 mg/m³) in exhaust streams per ISO 8573-2:2019 testing protocol.
Can it be integrated into a distributed vacuum network with multiple chambers?
Yes. Using DRETOP’s VAC-NET™ manifold controller, up to eight RZ-150 units can be synchronized for load-balanced, demand-driven operation across shared vacuum mains—reducing total energy consumption by up to 35% versus fixed-speed deployment.