dry oil free rotary screw vacuum pump for spice Industry

The dry oil-free rotary screw vacuum pump eliminates the need for lubricating oil throughout the entire working process, preventing oil pollution and reducing equipment maintenance issues. It relies on precision-engineered screws and fine dynamic balance correction for smooth, low-noise performance—making it ideal for clean, efficient, and reliable vacuum applications.

Technical Parameters

• Power range: 7.5 kW to 37 kW
• Pumping rate: 250 m³/h to 1440 m³/h
• Working pressure: 1 Pa to 2 Pa

Features of Dry Oil-Free Rotary Screw Vacuum Pump

1. Oil-free design: No lubricating oil in the pump chamber for completely clean, contamination-free operation.
2. High efficiency and energy saving: Mechanical variable volume compression reduces energy consumption, improving energy efficiency by over 20%.
3. Low noise: Frictionless design ensures smooth and quiet operation, suitable for noise-sensitive environments.
4. Eco-friendly and pollution-free: No oil emissions, reducing environmental pollution and sewage treatment costs.
5. Corrosion resistance: Options for nickel-phosphorus, Hastelloy coatings, or titanium alloy construction for harsh environments.
6. Low maintenance cost: Dry structure minimizes maintenance requirements and costs.

Working Principle

The pump operates on the synchronized reverse rotation of two precision screws with no physical friction between screws and pump body. Gas is drawn in, compressed, and discharged to create a vacuum:

• Isopitch vacuum pump: High roughing efficiency and large clearance design prevent clogging by solids or condensates—ideal for rough vacuum and condensable gases.
• Variable pitch vacuum pump: Reduces gas reflux, power consumption, and noise—especially suitable for flammable, explosive, or coking gases.

Performance Advantages

1. Energy saving & high efficiency: Improved energy efficiency by more than 20% compared to traditional pumps.
2. Stable and reliable: Maintains high vacuum levels for long periods under various conditions.
3. Environmentally friendly: Oil-free operation meets strict environmental standards and eliminates oil emission problems.
4. Low maintenance: Simple design without complex lubrication system greatly reduces maintenance intervals and costs.
5. High cooling efficiency: Reduced need for water-cooling (over 90% less), with low cooling temperature requirements.

Application Areas

• Chemical industry: Solvent recovery, gas extraction, and vacuum support for chemical reactions.
• Photovoltaic industry: Vacuum adsorption, coating, and evaporation for silicon wafer manufacturing.
• Pharmaceutical industry: Evaporation, concentration, and drying processes with oil-free, contamination-free environments.
• Automotive industry: Automotive painting, vacuum packaging, and related processes.
• Lithium battery manufacturing: Vacuum drying and processing of battery materials.
• Spice and food industry: Spice refining, odor extraction, and clean production environments.
• Metallurgical industry: Powerful vacuum extraction for smelting processes.
• Aerospace: Pollution-free vacuum systems for high-precision equipment.
• Coating technology: Stable vacuum for vacuum coating equipment.
• Research institutes & new energy: Laboratory vacuum support and equipment testing, especially in semiconductor and new energy fields.