DRETOP SBJ-160 Dry Screw Vacuum Pump Unit with Variable Pitch & Diameter Rotors

Overview

The DRETOP SBJ-160 is a high-performance, oil-free dry screw vacuum pump unit engineered for demanding industrial and laboratory applications requiring clean, stable, and corrosion-resistant vacuum environments. Unlike conventional oil-sealed or liquid-ring pumps, the SBJ-160 employs a single-stage dry screw architecture featuring variable pitch and variable diameter rotors—optimized to deliver enhanced volumetric efficiency, lower exhaust temperature, reduced vibration, and improved tolerance to condensable vapors, particulates, and mildly corrosive process gases. Its operating principle relies on synchronous, non-contact rotary displacement: two precisely machined, counter-rotating helical screws trap and compress gas axially from inlet to outlet without internal lubrication, eliminating hydrocarbon contamination and enabling compliance with stringent purity requirements in semiconductor fabrication, pharmaceutical lyophilization, thin-film coating, and lithium-ion battery manufacturing.

Key Features

• Variable pitch & diameter rotor design ensures superior compression ratio and energy efficiency across wide pressure ranges—from atmospheric start-up to ultimate vacuum ≤0.1 Pa.
• Fully dry, oil-free operation guarantees zero hydrocarbon backstreaming; ideal for processes sensitive to organic contamination (e.g., ALD, CVD, UHV sputtering).
• Water-cooled thermal management replaces air cooling, suppressing airborne particulate generation and enabling stable operation in cleanroom-class environments.
• Integrated nitrogen purge capability (standard) protects sealing surfaces and bearings against deposition of sub-micron particles (e.g., silicon, graphite, metal oxides), extending maintenance intervals and operational uptime.
• Multi-layer vibration damping and precision dynamic balancing reduce mechanical noise to <68 dB(A) and structural transmission—critical for integration into R&D labs and metrology-sensitive facilities.
• Corrosion-resistant surface options (e.g., plasma-sprayed ceramic, electroless nickel, or PTFE-based coatings) are available per ASTM B733 and ISO 14522 standards to accommodate HCl, HF, NH₃, SO₂, and organic solvent vapors.

Sample Compatibility & Compliance

The SBJ-160 is validated for continuous duty with non-reactive, mildly aggressive, and condensable gas streams—including water vapor, ethanol, acetone, CO₂, and low-concentration acid/alkali mixtures. It tolerates suspended particulates up to 10 µm in diameter at concentrations ≤5 mg/m³ without performance degradation, provided optional inline filtration is specified. The pump conforms to IEC 61000-6-2 (EMC immunity) and IEC 61000-6-4 (EMC emissions), and meets CE safety directives (2014/35/EU, 2014/30/EU). For regulated industries, its control interface supports audit-trail-ready data logging compliant with FDA 21 CFR Part 11 when integrated with validated PLC systems.

Software & Data Management

While the base SBJ-160 operates via hardwired local controls, optional PLC-integrated automation enables real-time monitoring of inlet pressure, motor current, coolant flow rate, and bearing temperature. All parameters are accessible via Modbus RTU/TCP or Profibus DP protocols. When paired with DRETOP’s proprietary VacuumLink™ software (Windows-based), users gain graphical trend analysis, alarm history, predictive maintenance alerts, and exportable CSV/Excel reports traceable to GLP/GMP documentation workflows. Remote diagnostics and firmware updates are supported over secure Ethernet connections—facilitating centralized fleet management across multi-site manufacturing operations.

Applications

• Semiconductor: Load-lock evacuation, etch chamber rough pumping, and pre-vacuum stages prior to turbomolecular pump engagement.
• Pharmaceutical: Freeze-drying (lyophilization) primary drying cycles, where consistent low-pressure control (<1 Pa) and moisture-handling capability are essential.
• Lithium Battery Manufacturing: Electrode drying ovens, electrolyte filling chambers, and formation cell evacuation—benefiting from oil-free integrity and thermal stability.
• Optics & Thin-Film Coating: Sputtering and evaporation systems requiring rapid pump-down and minimal outgassing interference.
• Research & Development: High-vacuum simulation chambers, plasma physics experiments, and material science furnaces where reproducibility and cleanliness are non-negotiable.

FAQ

What distinguishes the SBJ-160 from standard dry screw pumps?
The variable pitch and variable diameter rotor geometry improves adiabatic compression efficiency, reduces heat load by ~18% versus constant-pitch designs, and delivers higher pumping speed retention below 10 Pa—particularly advantageous in processes transitioning from medium to high vacuum.
Can the SBJ-160 serve as a standalone roughing pump for turbomolecular systems?
Yes. With an ultimate pressure of ≤0.1 Pa and 44 L/s speed at 1 Pa, it provides sufficient backing for turbo pumps up to 1200 L/s nominal speed, meeting ISO 21360-1 requirements for backing performance.
Is water cooling mandatory?
Yes—water cooling is integral to thermal management and structural stability. Minimum flow rate: 2.8 L/min at 0.3–0.6 bar pressure differential; inlet temperature ≤25 °C recommended.
How is particle-laden gas handled without clogging?
The straight-through, non-tortuous gas path and gap-tolerant rotor sealing minimize particle trapping; combined with standard N₂ purge at shaft seals, it maintains >95% uptime in silicon wafer handling applications per 6-month field data.
Does DRETOP provide validation documentation for GMP environments?
Upon request, Factory Acceptance Test (FAT) reports, material certifications (3.1 EN 10204), and IQ/OQ protocol templates are supplied—supporting user-led qualification under EU Annex 15 and USP .