II. Core Basic Parameters 

Air extraction rate: 108 – 9000 m³/h (30 – 2500 L/s). Test standard: inlet pressure 100 Pa, intake temperature 20℃, atmospheric pressure 101325 Pa. Performance deviation ≤ ±5% 

2. Maximum vacuum level: ≤ 0.1 Pa (for highly clean dry operation conditions), standard model ≤ 0.5 Pa, customizable ultra-high vacuum model ≤ 0.01 Pa 

3. Working pressure range: 1 atmosphere pressure to 1×10⁻² Pa, covering the entire range from low to high vacuum levels, suitable for the gas extraction requirements of multiple process stages. 

4. Startup method: PLC intelligent linkage control. The pre-stage pump of the screw is started first. Once the system pressure drops below the threshold, the rotary pump will automatically delay its startup to prevent overload. 

5. Motor Configuration: The entire unit is equipped with two motors. The power of the Roots pump motor ranges from 1.5 to 11 kW, while the power of the screw pump motor ranges from 3 to 45 kW. Both motors are standardly equipped with Y series three-phase asynchronous motors. Customized models for explosion-proof and variable-frequency applications are also available. 

6. Operating temperature rise: Under rated operating conditions, the bearing temperature shall not exceed 75℃, and the surface temperature of the pump body shall not exceed 85℃. There is no risk of overheating. 

7. Noise Index: ≤ 72 dB(A). The entire unit is equipped with shock-absorbing bases and sound insulation materials to further reduce operating noise. 

8. Working environment temperature: -5℃ to 45℃, environmental humidity ≤ 85%RH (no condensation), can be equipped with a constant temperature device to adapt to special environments 

9. Cooling method: Standard configuration is air cooling. For high-power units, water cooling is also available. The cooling efficiency is high, ensuring long-term continuous operation. 

10. Safety device: Standard features include overload protection, over-temperature protection, differential pressure protection, and anti-reflux protection for check valves. The operational safety is maximized. 

III. Structure and Core Configuration Parameters 

• Unit structure: Vertical/Horizontal integrated frame, Roots pump + screw pump operate in coaxial manner / separate layout. The structure is compact, occupies a small area, and installation does not require complex foundations. 

• Rotz pump body: QT500 ductile iron rotor, HT200 gray cast iron pump body, precision clearance design, frictionless operation, oil-free and clean 

• Main body of screw pump: QT600 rotor, stainless steel rotor, titanium alloy rotor, Hastelloy alloy rotor, coated screw rotor. High-strength cast iron pump body, resistant to wear and corrosion, high pumping efficiency, can withstand trace amounts of water vapor and dust. 

• Sealing configuration: The entire unit adopts fluororubber/polytetrafluoroethylene mechanical seals, ensuring no leakage and no oil vapor evaporation, thereby maintaining high vacuum cleanliness. 

• Lubrication method: The bearing at the suction end is externally lubricated with grease, the vacuum pump at the exhaust gear end is lubricated with vacuum pump oil, and the entire interior of the pump cavity is completely oil-free, completely eliminating medium contamination and eliminating the need for frequent oil replacement maintenance. 

• Pipeline configuration: Standard equipment includes vacuum check valve, vacuum pressure gauge, differential pressure sensor. Optional equipment includes vacuum gauge, solenoid valve, steam-water separator. 

• Control method: Standardly equipped with manual control. Optional PLC fully automatic control system is available, enabling start-stop linkage, fault alarm, and remote monitoring. 

IV. Interface Specification Parameters 

Total suction inlet diameter of the unit: DN50, DN80, DN100, DN150, DN200, DN250. Customizable as needed. 

Exhaust pipe diameters: DN40, DN50, DN80, DN100, DN150 

European standard: RF convex surface standard flange, KF quick-connect flange, ISO-K high vacuum flange. Installation direction can be flexibly adjusted. 

V. Detailed Parameter Table of Typical Models

VI. Applicable Conditions and Customized Services 

Purgeable medium: Clean air, steam, inert gas, non-corrosive organic vapor. Can tolerate a small amount of non-viscous dust. Strictly prohibited from purging flammable, explosive, strongly corrosive, or media containing hard particles. 

2. Intake medium temperature: Standard ≤ 60℃. Customizable high-temperature version ≤ 120℃. Suitable for high-temperature process vacuum extraction requirements. 

3. Core application scenarios: Electronic semiconductor packaging, vacuum coating, vacuum freeze-drying, pharmaceutical distillation purification, chemical degassing, aerospace leak detection, new material sintering, laboratory high-vacuum experiments 

4. Customization Options: Available in Ex d IIB T4 explosion-proof type, all stainless steel anti-corrosion type, variable frequency speed control type, ultra-high vacuum model, closed-loop circulating air-cooling model; additional remote monitoring, automatic start-stop, and fault alarm systems can be installed. 

5. Ancillary Services: Offer on-site installation and commissioning of the equipment, operation and maintenance training, after-sales maintenance and repair services, as well as overall design of the vacuum system. Support for non-standard sizes and special interfaces customization. 

VII. Operating Precautions 

The crew must follow the sequence of starting the screw pump first and then the rotary pump. It is strictly prohibited to start the rotary pump alone to avoid overloading and damage to the motor. 

Before operation, check whether the sealing components and pipeline connections of the unit are in good condition, and whether the check valves are functioning properly. Eliminate the problems of air leakage and backflow. 

During operation, real-time monitoring of vacuum level, pump temperature rise, motor current and unit noise is carried out. Continuous operation under conditions of excessive temperature, overload or excessive pressure difference is strictly prohibited. 

Regularly check the condition of the bearing lubricating grease. Replace the lubricating grease every 3,000 hours. There is no need to replace the lubricating oil in the pump chamber. The maintenance is very simple. 

When shutting down, first turn off the Roots pump, then delay for 3 to 5 minutes before turning off the screw pump. At the same time, close the intake valve to prevent vacuum backflow from damaging the pump body. 

• For long-term shutdowns, the rotor needs to be rotated regularly. Start the trial run once a month to prevent the rotor from getting stuck. In winter, take measures to prevent freezing to avoid pipeline cracking. 

Service hotline: 0533-8225516  1506431898