Explosion-Proof Oil Free Dry Screw Vacuum Pump LGV-250 250 m³/h for Solvent Recovery Systems

• Oil-Free Dry Operation: Zero lubrication required in the working chamber, eliminating oil mist contamination and wastewater discharge. Delivers 100% clean vacuum essential for solvent recycling companies, chemical solvent distributors, and hazardous materials processing facilities where process purity is non-negotiable.
• High Vacuum Performance: Achieves ultimate pressure as low as ≤5 Pa with 250 m³/h pumping speed across high vacuum regions, ensuring rapid evacuation and stable holding pressure for demanding industrial cycles.
• Air-Cooled Thermal Management: Efficient air-cooled system with optimized heat dissipation design maintains stable operating temperature at 5.5 kW continuous duty, eliminating thermal drift and extending component lifespan under 24/7 production schedules.
• Corrosion Resistant Flow Path: Flow-through components available in titanium alloy, SS316 stainless steel, or nano-ceramic lining to handle condensable gases, acidic vapors, water vapor, and mildly corrosive media without performance degradation over extended service intervals.
• Automatic Purging System: Integrated self-cleaning mechanism automatically removes accumulated condensate and fine particulates during operation, maintaining optimal internal clearances and preventing efficiency loss in demanding solvent recovery environments.
• Premium Bearing and Seal Package: Equipped with SKF/NSK precision bearings and German-engineered mechanical seals for superior rotational stability, extended maintenance intervals exceeding 15,000 hours, and reliable containment of process gases.
• Low Vibration Low Noise Operation: Dynamically balanced twin-screw rotors with precision-ground helical profiles achieve noise levels of <78 dB, making the pump suitable for noise-sensitive facilities including laboratories, clean rooms, and urban industrial parks.
• Full International Certification Suite: Manufactured under ISO 9001 quality management, certified to CE safety standards, and accompanied by IAF/CNAS accredited test reports, providing complete documentation for customs clearance and regulatory compliance worldwide.

The LGV-250 Series Dry Oil-Free Screw Vacuum Pump leverages advanced twin-screw compression technology to deliver uncompromised vacuum performance without any lubricant in the process chamber. A matched pair of precision CNC-machined alloy steel screws rotates in synchronized counter-rotation within a tightly toleranced housing, creating a progressive series of sealed compression cells that continuously convey gas from the suction port through to the exhaust. This positive-displacement mechanism achieves consistent volumetric efficiency across the entire operating pressure range from atmospheric to ultimate vacuum, unlike lobe or claw pumps that suffer from internal leakage at higher compression ratios.

Engineered specifically for solvent recycling companies, chemical solvent distributors, and hazardous materials processing facilities, the LGV-250 addresses the critical operational demands that conventional oil-sealed pumps cannot meet: absolute freedom from backstreaming contamination, tolerance for condensable vapor loads, and compatibility with mildly aggressive process chemistries. The air-cooled thermal management system actively regulates operating temperature to within a narrow band, preventing the thermal expansion that causes tip clearance changes and efficiency drift in lesser designs. For multi-shift production environments, the pump accepts a direct process gas inlet temperature range from -20°C to +80°C without requiring pre-conditioning, simplifying system integration and reducing auxiliary equipment costs.

The pump cavity geometry features a short, straight-through gas path with no internal valves, no contacting surfaces, and no dead zones where residue can accumulate. This architecture is inherently resistant to particulate fouling and liquid slug ingestion, providing a level of process robustness that translates directly to higher production uptime. Every rotor assembly undergoes dynamic two-plane balancing to ISO 1940 Grade G2.5 or better, verified by computerized measurement, ensuring that residual vibration at operating speed remains below 1.8 mm/s RMS — a critical parameter for Solvent Recovery applications where vibration transmission can compromise sensitive downstream processes or precision instrumentation.

Comprehensive quality assurance procedures apply throughout the manufacturing chain: raw material chemical composition analysis, in-process dimensional verification using CMM equipment to ±5 µm accuracy, helium mass spectrometer leak testing of every assembled pump to <1×10&supminus;&sup6; mbar·L/s, and full-load performance curve mapping at the factory test stand before shipment. Each pump ships with its individual test certificate recording actual measured pumping speed, ultimate pressure, power consumption, noise level, and vibration signature — complete traceability documentation that satisfies the qualification requirements of major pharmaceutical, semiconductor, and chemical multinationals.

The LGV-250 dry screw vacuum pump is purpose-engineered for demanding industrial environments where oil-free vacuum, process gas compatibility, and uninterrupted duty cycles define operational requirements. Primary applications include Solvent vapor recovery, volatile organic compound extraction, flammable gas handling, and hazardous environment vacuum applications requiring ATEX-compliant equipment. The pump excels in processes requiring simultaneous handling of condensable vapors and non-condensable gases, where the automatic purging feature maintains consistent vacuum levels without operator intervention.

Beyond the primary solvent recovery focus, the versatile port configuration and wide operating envelope make the LGV-250 equally suitable for vacuum coating and thin-film deposition, single crystal growth furnaces, vacuum induction melting, electronic component encapsulation, and photovoltaic cell lamination. The modular design accepts standard ISO-KF and ISO-K vacuum flanges, enabling direct integration with existing vacuum piping infrastructure without custom adapters. For system integrators and OEMs, we offer custom manifold configurations and communication protocol interfaces such as Modbus RTU and Profibus DP for centralized vacuum system control integration.

Each LGV-250 vacuum pump is shipped in a purpose-built wooden export crate with custom-cut high-density foam cushioning that immobilizes the pump during transit while allowing forklift access from all four sides. The crate interior includes welded moisture-barrier lining and silica gel desiccant packs to prevent condensation during ocean freight. All port openings are sealed with protective caps, and the rotor assembly is locked in position with a shipping bracket to prevent bearing brinelling from transport vibration.

Quality assurance extends beyond the factory floor: every pump carries a 12-month comprehensive warranty covering materials and workmanship defects, with a guaranteed 72-hour response time for technical inquiries. Our global network of authorized service partners provides on-site commissioning, preventive maintenance programs, genuine spare parts inventory with 48-hour dispatch, and emergency breakdown support. For large fleet operators, we offer customized service level agreements including on-site spare parts stock, quarterly performance audits, and operator training programs, ensuring your vacuum infrastructure delivers maximum return on investment throughout its operational life.