Single Dry Screw Vacuum System With Roots Pump
Maximize industrial efficiency with Ever-Power’s Dry Screw Vacuum System with Roots Pump. An oil-free, energy-saving solution ideal for chemical, pharmaceutical, and semiconductor applications requiring deep vacuum and zero contamination.
The Ultimate Oil-Free Solution for High-Efficiency Industrial Vacuum Applications
Product Overview
At Ever-Power, we understand that modern industry demands vacuum solutions that are not only powerful but also environmentally responsible and cost-effective. Our dry screw vacuum system is engineered to meet these rigorous standards. By combining the high pumping speed of a Roots booster pump with the robust backing capability of a dry screw vacuum pump, we deliver a system that outperforms traditional single-pump setups in both energy efficiency and ultimate vacuum levels.
This system is an oil free dry screw vacuum system, meaning the gas passage is completely free of oil and sealing fluids. This eliminates the risk of process contamination and solves the headache of treating oil-contaminated sewage, making it the preferred choice for industries prioritizing purity and sustainability.
Roots Screw Vacuum Unit Performance Parameters
| Model | Pump Model Composition | Ultimate Pressure (Pa) | Pumping Speed (L/s) | Inlet Diam (mm) | Outlet Diam (mm) | Motor Power (kW) | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Main | Inter. | Backing | Main | Inter. | Backing | |||||
| JZPLG70-2 | ZJP-70 | / | LG-30 | 0.5 | 70 | 80 | 40 | 1.1 | / | 4 |
| JZPLG150-5 | ZJP-150 | / | LG-30 | 0.5 | 150 | 100 | 40 | 2.2 | / | 4 |
| JZPLG150-2 | ZJP-150 | / | LG-70(LGB-70E) | 0.5 | 150 | 100 | 65 | 2.2 | / | 11(7.5) |
| JZPLG300-4 | ZJP-300 | / | LG-70(LGB-70E) | 0.5 | 300 | 150 | 65 | 4 | / | 11(7.5) |
| JZPLG300-3 | ZJP-300 | / | LG-110(LGB-110E) | 0.5 | 300 | 150 | 80 | 4 | / | 15(11) |
| JZPLG300-2 | ZJP-300 | / | LG-150(LGB-180E) | 0.5 | 300 | 150 | 80 | 4 | / | 18.5(15) |
| JZPLG600-8 | ZJP-600 | / | LG-70(LGB-70E) | 0.5 | 600 | 200 | 65 | 7.5 | / | 11(7.5) |
| JZPLG600-6 | ZJP-600 | / | LG-110(LGB-110E) | 0.5 | 600 | 200 | 80 | 7.5 | / | 15(11) |
| JZPLG600-4 | ZJP-600 | / | LG-150(LGB-180E) | 0.5 | 600 | 200 | 80 | 7.5 | / | 18.5(15) |
| JZPLG1200-8 | ZJP-1200 | / | LG-150(LGB-180E) | 0.5 | 1200 | 250 | 80 | 11 | / | 18.5(15) |
| JZPLG1200-6 | ZJP-1200 | / | LG-220(LGB-230E) | 0.5 | 1200 | 250 | 100 | 11 | / | 30(22) |
| JZPLG1800-8 | ZJP-1800 | / | LG-220(LGB-230E) | 0.5 | 1800 | 250 | 100 | 15 | / | 30(22) |
| JZPLG1800-6 | ZJP-1800 | / | LG-300(LGB-300) | 0.5 | 1800 | 250 | 100 | 15 | / | 37(22) |
| JZPLG2500-8 | ZJP-2500 | / | LG-300(LGB-300) | 0.5 | 2500 | 320 | 100 | 18.5 | / | 37(22) |
| High Vacuum Series (Ultimate Pressure 0.1 Pa) | ||||||||||
| JZPLG150-22 | ZJP-150 | ZJP-70 | LG-30 | 0.1 | 150 | 100 | 40 | 2.2 | 1.1 | 4 |
| JZPLG300-22 | ZJP-300 | ZJP-150 | LG-70(LGB-70E) | 0.1 | 300 | 150 | 65 | 4 | 2.2 | 11(7.5) |
| JZPLG600-42 | ZJP-600 | ZJP-150 | LG-70(LGB-70E) | 0.1 | 600 | 200 | 65 | 7.5 | 2.2 | 11(7.5) |
| JZPLG600-24 | ZJP-600 | ZJP-300 | LG-70(LGB-70E) | 0.1 | 600 | 200 | 65 | 7.5 | 4 | 11(7.5) |
| JZPLG600-22 | ZJP-600 | ZJP-300 | LG-150(LGB-180E) | 0.1 | 600 | 200 | 80 | 7.5 | 4 | 18.5(15) |
| JZPLG1200-42 | ZJP-1200 | ZJP-300 | LG-150(LGB-180E) | 0.1 | 1200 | 250 | 80 | 11 | 4 | 18.5(15) |
| JZPLG1200-24 | ZJP-1200 | ZJP-600 | LG-150(LGB-180E) | 0.1 | 1200 | 250 | 80 | 11 | 7.5 | 18.5(15) |
| JZPLG1200-23 | ZJP-1200 | ZJP-600 | LG-220(LGB-230E) | 0.1 | 1200 | 250 | 100 | 11 | 7.5 | 30(22) |
| JZPLG1800-34 | ZJP-1800 | ZJP-600 | LG-150(LGB-180E) | 0.1 | 1800 | 250 | 80 | 15 | 7.5 | 18.5(15) |
| JZPLG1800-33 | ZJP-1800 | ZJP-600 | LG-220(LGB-230E) | 0.1 | 1800 | 250 | 100 | 15 | 7.5 | 30(22) |
| JZPLG1800-32 | ZJP-1800 | ZJP-600 | LG-300(LGB-300) | 0.1 | 1800 | 250 | 100 | 15 | 7.5 | 37(22) |
| JZPLG2500-44 | ZJP-2500 | ZJP-600 | LG-150(LGB-180E) | 0.1 | 2500 | 320 | 80 | 18.5 | 7.5 | 18.5(15) |
| JZPLG2500-43 | ZJP-2500 | ZJP-600 | LG-220(LGB-230E) | 0.1 | 2500 | 320 | 100 | 18.5 | 7.5 | 30(22) |
| JZPLG2500-42 | ZJP-2500 | ZJP-600 | LG-300(LGB-300) | 0.1 | 2500 | 320 | 100 | 18.5 | 7.5 | 37(22) |
| JZPZQLG Series (Gas Cooled Roots + Screw) | ||||||||||
| JZPZQLG600-22 | ZJP-600 | ZJQ-400 | LG-150(LGB-180E) | 0.1 | 600 | 200 | 80 | 7.5 | 37 | 18.5(15) |
| JZPZQLG1200-24 | ZJP-1200 | ZJQ-600 | LG-150(LGB-180E) | 0.1 | 1200 | 250 | 80 | 11 | 45 | 18.5(15) |
| JZPZQLG1800-34 | ZJP-1800 | ZJQ-600 | LG-150(LGB-180E) | 0.1 | 1800 | 250 | 80 | 15 | 45 | 18.5(15) |
| JZPZQLG2500-44 | ZJP-2500 | ZJQ-600 | LG-150(LGB-180E) | 0.1 | 2500 | 320 | 80 | 18.5 | 45 | 18.5(15) |
*Note: "ZP" indicates main Roots pump with overflow valve. "LG" indicates Screw Vacuum Pump. Parentheses in motor power indicate alternative configuration options.
Single Dry Screw Vacuum System With Roots Pump Performance Specifications
| Model | Pump Model | Ultimate Pressure (Pa) | Pumping Speed (L/s) | Inlet Diam (mm) | Outlet Diam (mm) | Motor Power (kW) | ||
|---|---|---|---|---|---|---|---|---|
| Main Pump | Fore Pump | Main Pump | Fore Pump | |||||
| JZP(C)2H150-5 JZJ(C)2H150-5 | ZJP(C)150 ZJ(C)150 | 2H-30B | 3×10-2 | 150 | 100 | 50 | 2.2 | 4 |
| JZP(C)2H300-4 JZJ(C)2H300-4 | ZJP(C)300 ZJ(C)300 | 2H-70B | 3×10-2 | 300 | 150 | 76 | 4 | 7.5 |
| JZP(C)2H600-8 JZJ(C)2H600-8 | ZJP(C)600 ZJ(C)600 | 2H-70B | 3×10-2 | 600 | 200 | 76 | 7.5 | 7.5 |
| JZP(C)2H1200-8 JZJ(C)2H1200-8 | ZJP(C)1200 ZJ(C)1200 | 2H-150 | 3×10-2 | 1200 | 250 | 80 | 11 | 15 |
Single Dry Screw Vacuum System With Roots Pump Performance Specifications
| Model | Pump Model | Ultimate Pressure (Pa) | Pumping Speed (L/s) | Inlet Diam (mm) | Outlet Diam (mm) | Motor Power (kW) | ||
|---|---|---|---|---|---|---|---|---|
| Main Pump | Fore Pump | Main Pump | Fore Pump | |||||
| JZP(C)H150-2 JZJ(C)H150-2 | ZJP(C)150 ZJ(C)150 | HGL-70 | 5×10-2 | 150 | 100 | 50 | 2.2 | 5.5 |
| JZP(C)H300-4 JZJ(C)H300-4 | ZJP(C)300 ZJ(C)300 | HGL-70 | 5×10-2 | 300 | 150 | 63 | 4 | 5.5 |
| JZP(C)H600-8 JZJ(C)H600-8 | ZJP(C)600 ZJ(C)600 | HGL-70 | 5×10-2 | 600 | 200 | 63 | 7.5 | 5.5 |
| JZP(C)H600-4 JZJ(C)H600-4 | ZJP(C)600 ZJ(C)600 | HGL-150 | 5×10-2 | 600 | 200 | 80 | 7.5 | 11 |
| JZP(C)H1200-8 JZJ(C)H1200-8 | ZJP(C)1200 ZJ(C)1200 | HG-150 | 5×10-2 | 1200 | 250 | 80 | 11 | 15 |
| JZPH1800-6 JZJH1800-6 | ZJP1800 ZJ1800 | HGL-150+ HGL-150 | 5×10-2 | 1800 | 250 | 80+80 | 15 | 15+15 |
System Structure & Engineering Features
The dry screw vacuum system with roots pump is a sophisticated integrated unit. It primarily consists of a main Roots pump (booster) and a backing dry screw pump. These core components are seamlessly integrated with connection pipelines, precision valves, exhaust systems, and an advanced electrical control box.
Intelligent Control: The operation is automated for maximum efficiency. Once the backing screw pump establishes the initial vacuum, a high-precision vacuum gauge and vacuum relay monitor the pressure. When the system reaches the predetermined cut-in pressure, the Roots pump is automatically activated. This staged activation protects the Roots pump from high-pressure differentials while rapidly accelerating the pumping speed in the lower pressure ranges.
Non-Contact Design: A defining feature of our industrial dry screw vacuum system is the non-contact rotor design in both the Roots and Screw pumps. The rotors do not touch each other or the pump housing. This engineering precision results in:
- Low Noise & Vibration: The absence of metal-to-metal contact significantly reduces operational noise and mechanical vibration, creating a quieter work environment.
- Reduced Maintenance: With no friction between rotors, wear and tear are minimized, leading to a drastically lower structural failure rate and longer service intervals.
- Zero Contamination: Since no lubricant is required within the compression chamber, the system discharges no sewage or waste oil, classifying it as a truly green, energy efficient dry screw vacuum system.
Why Choose a Combination System? The Energy Efficiency Advantage
Many industrial processes, such as vacuum distillation, operate at low pressures where standard pumps lose efficiency. Our dry screw roots vacuum pump combination is specifically designed to excel in these low-pressure zones.
Comparative Case Study:
Consider a vacuum distillation process requiring a pumping speed of 300 L/s at a working pressure of 1000 Pa.
- Option A (Single Pump): Using a standalone LG300 Screw Vacuum Pump would typically require a motor power of 37kW.
- Option B (Our System): Using the Ever-Power JZPLG300-4 Vacuum System (combining a Roots booster with a smaller screw pump) requires only 15kW total power.
Result: The JZPLG300-4 system saves over 50% in energy consumption while achieving the same pumping speed and a lower ultimate pressure.
This significant energy saving makes the roots booster screw vacuum system not just an operational asset, but a financial one, drastically reducing the Total Cost of Ownership (TCO) over the lifespan of the equipment.
Industrial Applications
The high vacuum capability and oil-free nature of the dry screw vacuum system for industry make it the ideal solution for complex and sensitive processes.
Chemical & Pharmaceutical Processing
In solvent recovery, drying, and distillation, process gases often contain volatile organic compounds (VOCs). A dry screw vacuum system for chemical processing allows for the direct recovery of these solvents at the exhaust without oil contamination, improving safety and profitability.
Semiconductor & Electronics
The manufacturing of semiconductors requires ultra-clean vacuum environments. Our dry screw vacuum system for semiconductor manufacturing ensures that no oil vapor back-streams into the process chamber, protecting delicate wafers and coatings from carbon contamination.
Aerospace & Simulation
Space simulation chambers require deep vacuum levels to mimic orbital conditions. The high vacuum dry screw roots pump system provides the necessary ultimate vacuum and reliability for long-duration testing cycles.
Smelting & Heat Treatment
For vacuum smelting and heat treatment, the system handles dust and particulates better than oil-sealed pumps (which form sludge). The robust rotors of the dry screw + roots vacuum pump solution can handle harsh industrial environments with proper filtration.
How to Select the Right System
Selecting the correct roots pump and dry screw vacuum combination depends on several critical factors regarding your specific application:
- Required Ultimate Pressure: Determine the deepest vacuum level your process requires. Our multi-stage systems can reach lower pressures than single-stage units.
- Pumping Speed at Working Pressure: Do not just look at the maximum pumping speed. Evaluate the speed at your specific working pressure (e.g., 1000Pa vs 10Pa).
- Gas Composition: Is the gas corrosive? Flammable? Does it contain condensable vapors? We offer special coatings (such as Nickel or PFA) for the screw rotors to handle aggressive chemicals.
- Energy Consumption: For continuous operations, sizing the Roots booster correctly against the backing pump is crucial for maximizing the energy efficient dry screw vacuum system benefits.
Quality Assurance & Testing
At Ever-Power, every unit undergoes rigorous testing before leaving our facility. We utilize advanced helium leak detection and digital performance monitoring to ensure that your industrial roots screw vacuum pumping system arrives ready for immediate integration.
Frequently Asked Questions
1. What is the main advantage of adding a Roots pump to a dry screw pump?
Adding a Roots pump acts as a booster. It significantly increases the pumping speed, especially at lower pressures (high vacuum), and improves the ultimate vacuum level of the system. It also allows the system to consume less energy compared to a larger single screw pump doing the same work.
2. Does this system require any water for cooling?
Yes, while the pumping chamber is "dry" (no oil), the pump jackets and sometimes the rotors require cooling water to manage the heat of compression. We also offer closed-loop cooling units if facility water is not available.
3. Can this system handle corrosive gases?
Yes. Since it is an oil-free system, there is no oil to degrade. Furthermore, we can coat the internal wetted parts (rotors and housing) with PFA, Nickel, or other anti-corrosion materials to withstand aggressive chemical vapors.
4. How does the "Dry" aspect benefit the pharmaceutical industry?
In pharma, product purity is paramount. Oil-sealed pumps can back-stream oil vapor into the chamber, contaminating the product. Our dry system eliminates this risk. Additionally, it allows for the recovery of valuable solvents at the exhaust, which is a significant cost benefit.
5. What is the maintenance interval for this system?
Because there is no contact between rotors and no oil to change in the pumping chamber, maintenance is minimal. The main requirements are checking the gear oil in the gearbox and ensuring cooling water flow. Gear oil changes are typically required every 3,000 to 5,000 hours, depending on usage intensity.
Additional information
| edited | by hyw |
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