Single Dry Screw Vacuum System With Roots Pump
Maximize efficiency with Ever-Power’s Dry Screw Vacuum System with Roots Pump. An oil-free, energy-saving solution for deep vacuum applications in coating, pharma, and aerospace. Get a factory-direct quote for our JZPLG series today.
The ultimate oil-free solution for demanding industrial environments. Combining the high-speed boosting capability of a Roots blower with the robust, contaminant-handling power of a dry screw backing pump, the Ever-Power JZPLG series delivers deep vacuum, zero discharge pollution, and superior energy efficiency.
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 |
The Evolution of Clean Vacuum Technology
In modern manufacturing, the demand for clean, contaminant-free vacuum environments is higher than ever. Traditional oil-sealed pumps often struggle with solvent recovery, oil backstreaming, and frequent maintenance intervals. This is where the Dry Screw Vacuum System With Roots Pump revolutionizes the process.
The Ever-Power JZPLG series is a sophisticated vacuum manipulator consisting of a main Roots pump (booster) and a dry screw backing pump. These components are seamlessly integrated via precision pipelines, high-performance valves, and a centralized electrical control box. Unlike standalone pumps, this system is engineered for synergy: the dry screw pump handles the discharge to the atmosphere, while the Roots pump amplifies the pumping speed at lower pressures, allowing for a high efficiency dry screw vacuum pumps with roots blower configuration.
How the System Operates
The intelligence of the JZPLG system lies in its automated control logic. Once the dry screw pump (the backing pump) establishes a preliminary vacuum, the Roots pump is automatically engaged via a vacuum gauge and relay system. This staged approach protects the Roots pump from high-pressure differentials while maximizing throughput.
Crucially, because the rotating parts within both the Roots pump and the screw pump do not make contact with the casing or each other, the system operates with exceptionally low noise and vibration. This non-contact design also means there is no need for internal lubrication in the pumping chamber, making this a truly Roots pump dry vacuum system that produces no wastewater or waste oil.
Key Structure and Features
- ✓
Oil-Free Operation: The compression chambers are completely free of oil, eliminating the risk of process contamination and making solvent recovery simple and pure. - ✓
Energy Efficiency: By combining pumps, we achieve higher vacuum levels with less energy. For instance, a process requiring 300 L/s at 1000 Pa can be handled by our JZPLG300-4 unit (15 kW) far more efficiently than a standalone 37 kW screw pump. - ✓
Corrosion Resistance: The screw rotors and internal coatings are designed to handle corrosive gases that would destroy standard oil-sealed units. - ✓
Configurable Staging: Available as a single Roots + Screw system or a Double Roots + Screw system for ultra-deep vacuum requirements.
Why Choose a Dry Screw Vacuum System?
For engineers and facility managers, the choice between a dry screw vacuum system and traditional oil-sealed pumps often comes down to Total Cost of Ownership (TCO) and process integrity.
1. Energy Efficiency & Performance
Roots screw vacuum manipulators are far more suitable for low-pressure operation than single screw vacuum pumps. A standalone screw pump loses efficiency at lower pressures. By adding a Roots blower, we boost the capacity where it matters most.
Case Study: In a typical vacuum distillation process requiring 300 L/s at 1000 Pa, selecting a JZPLG300-4 vacuum manipulator (Total 15 kW) is significantly more energy-efficient than selecting a single LG300 screw vacuum pump (37 kW). This results in a 59% reduction in energy consumption while achieving a lower ultimate pressure.
2. Industrial Applications
The JZPLG series is the best dry screw vacuum pump solution for industries requiring high purity and strict environmental compliance:
Chemical & Pharmaceutical
Ideal for distillation, drying, and solvent recovery. The dry pumping chamber ensures that solvents are not contaminated by oil, allowing for direct recovery and reuse.
Electronic & Semiconductor
Used in electronic coating and etching processes where oil backstreaming would ruin delicate wafers or optical components.
Metallurgy & Smelting
Perfect for vacuum smelting and heat treatment. The system handles the large gas loads and potential dust particulates better than oil-sealed counterparts.
Aerospace Simulation
Achieves the high vacuum levels necessary for altitude simulation testing without the noise and vibration of piston pumps.
Selection Guide: Configuring Your System
Choosing the correct dry screw vacuum pump for industrial use involves understanding your specific process variables.
-
1
Analyze Your Target Vacuum:
If you require vacuum levels around 0.5 Pa, our standard Two-Stage (Roots + Screw) system is sufficient. For deep vacuum applications requiring 0.1 Pa or better, select the Three-Stage (Double Roots + Screw) configuration.
-
2
Gas Composition Matters:
Is your gas corrosive? Flammable? Or does it contain condensable vapors? The JZPLG series excels at condensable gases because there is no oil to emulsify. For corrosive gases, we can offer specialized coatings on the screw rotors.
-
3
Budget vs. Long-Term Value:
While the initial dry screw vacuum pump price may be higher than an oil-sealed piston pump, the elimination of oil changes, filter disposals, and wastewater treatment results in a significantly lower operating cost over 3-5 years.
How Dry Screw Vacuum Systems Work
A dry screw pump utilizes two intermeshing screws rotating in opposite directions. As they rotate, they trap gas at the inlet and push it axially towards the exhaust. The "Roots" pump acts as a supercharger. It grabs large volumes of gas at low pressure and compresses it slightly before feeding it into the screw pump. This combination allows the screw pump to operate in its most efficient range, preventing overheating and maximizing speed.
Manufactured by Ever-Power
We are more than just a supplier; we are manufacturers. Our factory utilizes high-precision CNC machining centers to grind the complex profiles of our screw rotors, ensuring tight clearances without contact. Every JZPLG unit undergoes rigorous helium leak detection and performance testing before shipment.
Frequently Asked Questions (FAQ)
What is the main advantage of a dry screw vacuum system over an oil-sealed system?
The primary advantage is cleanliness. Dry screw systems do not use oil in the vacuum chamber, eliminating oil backstreaming and contamination of your product. They also do not require oil changes or disposal of contaminated oil, making them environmentally friendly and cheaper to maintain in the long run.
Can the JZPLG system handle liquids or solid particles?
Dry screw pumps can handle small amounts of liquid and soft particulates better than vane pumps because there are no sliding parts to jam. However, for significant liquid loads, a knockout pot or separator should be installed at the inlet. For hard solids, an inlet filter is required to prevent rotor damage.
How does the Roots pump start in this system?
The system includes an electrical control box with a vacuum gauge and relay. The backing screw pump starts first to lower the pressure. Once the system reaches a set vacuum level (safe for the Roots pump), the relay automatically triggers the Roots pump to start. This prevents the Roots pump from overheating due to high compression ratios at atmospheric pressure.
Is cooling water required for the JZPLG series?
Yes, dry screw pumps generate heat during compression. The pump casing is typically water-cooled to maintain proper operating temperatures and ensure the tight clearances between rotors are maintained. Please refer to the specific manual for water flow requirements.
What is the difference between ZP and ZJ Roots pumps in the model table?
"ZP" indicates a Roots pump equipped with an overflow valve (bypass valve). This allows the Roots pump to start at higher pressures alongside the backing pump without overheating, providing faster pump-down times. "ZJ" is a standard Roots pump that must wait for a specific vacuum level before starting.
Ready to Upgrade to Oil-Free Vacuum?
Contact Ever-Power's engineering team today for a custom proposal on our JZPLG Dry Screw Vacuum Systems.
Additional information
| edited | by hyw |
|---|
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