Advanced Oil‑Free Duplex Steel and Pure Hastelloy Series Dry Screw Pumps
Upgrade your industrial process with Ever-Power’s Oil-Free Dry Screw Vacuum Pumps. Featuring corrosion-resistant duplex steel components and high-efficiency screw technology, our pumps deliver reliable performance for chemical, pharmaceutical, and semiconductor applications. Contact us for a custom vacuum solution today.
Performance Parameters
| Model | Unit | LGB-70D | LGB-110D | LGB-150D | LGB-180D | LGB-200D |
|---|---|---|---|---|---|---|
| Pumping Speed (50Hz) | L/s | 70 | 110 | 150 | 180 | 200 |
| m³/h | 250 | 400 | 540 | 650 | 720 | |
| Ultimate Pressure | Pa | 50 | 50 | 50 | 50 | 50 |
| Max Discharge Pressure | bar | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 |
| Motor Power (50Hz) | kW | 7.5 | 11 | 18.5 | 18.5 | 18.5 |
| Speed (50Hz) | rpm | 2940 | 2940 | 2940 | 2940 | 2940 |
| Connection | Inlet (mm) | 65 | 65 | 100 | 100 | 100 |
| Outlet (mm) | 65 | 65 | 80 | 80 | 80 | |
| Cooling Water | Flow (L/min) | ≥13 | ||||
| Pressure (MPa) | 0.2 ~ 0.35 | |||||
| Out Temp (℃) | ≤40 | |||||
| Interface (G) | 1/2" | 1/2" | 1/2" | 1/2" | 1/2" | |
| Noise | dB(A) | 75 | 78 | 80 | 80 | 80 |
| Grease (Inlet) | L | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Oil (Discharge) | L | 1.2 | 1.2 | 1.8 | 1.8 | 1.8 |
| Nitrogen System | Pressure (MPa) | 0.05 | 0.05 | 0.06 | 0.06 | 0.06 |
| Flow (L/min) | 30-35 | 30-35 | 35-40 | 35-40 | 35-40 | |
| Weight | kg | 475 | 570 | 865 | 880 | 900 |
Product Overview: The Future of Vacuum Technology
In the modern landscape of industrial manufacturing, the demand for clean, consistent, and environmentally friendly vacuum generation is paramount. Traditional oil-sealed pumps often struggle with contamination, emulsification, and high maintenance costs. Ever-Power introduces our premium series of Industrial Dry Screw Vacuum Pumps, designed to solve these challenges comprehensively.
Our dry screw vacuum pumps utilize a pair of precision-engineered meshing screws that rotate synchronously at high speed in opposite directions within a robust pump casing. This sophisticated mechanism generates a powerful pumping action of tens or sixteen strokes per revolution. Crucially, the two screws undergo precise dynamic balancing and are supported by high-load bearings installed externally to the pumping chamber. Because a calculated clearance exists between the screws (and between the screws and the casing), there is no friction and no need for lubrication within the compression chamber.
This contact-free design allows our screw vacuum pumps to effectively remove gases containing large amounts of condensable gases, solvents, and dust particles without seizing. They stand as a superior, energy-efficient replacement for oil-sealed mechanical vacuum pumps, liquid ring vacuum pumps, and reciprocating vacuum pumps, particularly in sectors requiring high purity and reliability.
Key Features & Operational Advantages
When selecting a High Performance Dry Screw Vacuum Pump, reliability is key. Our series is packed with features designed to minimize downtime and maximize throughput.
- Pure, Oil-Free Operation
The completely oil-free pump chamber prevents back-streaming and contamination of your vacuum system. This solves critical issues such as oil emulsification, frequent working fluid changes, and the associated disposal costs. It represents a truly Low Maintenance Dry Screw Vacuum Pump solution. - Environmental Compliance & Efficiency
Dry operation produces no oil mist or fumes, directly benefiting the workplace environment and conserving petroleum resources. The pump is capable of handling large loads of water vapor and dust. With added accessories, it can safely pump flammable, explosive, and corrosive gases, making it an ideal Dry Screw Vacuum Pump for Chemical Processing. - Versatile Vacuum Capability
Our pumps offer an excellent ultimate vacuum load, suitable for both medium and low vacuum applications. For specialized needs, they can be paired with a Roots pump housing to form an oil-free medium vacuum pumping system, or with a molecular pump housing to create an oil-free high vacuum pumping system. - Superior Corrosion Resistance
We utilize special materials such as 2205/2507 duplex stainless steel and C276 Hastelloy alloy for wetted parts. This provides excellent resistance against aggressive chemicals, making our units particularly suitable for product distillation, drying, and degassing in pharmaceutical and chemical processes.
Note: For highly corrosive operating conditions, please contact our engineering team to discuss custom material coatings (Ni, PTFE) and seal configurations.
Typical Industry Applications
Our Industrial Vacuum Solutions Dry Screw Vacuum Pumps are trusted by B2B clients across diverse sectors:
Semiconductor & Electronics
Essential as a Dry Screw Vacuum Pump for Semiconductor Manufacturing. Used in etching, CVD, PVD, and ion plating processes where oil contamination cannot be tolerated.
Chemical & Pharmaceutical
Reliable performance in distillation, drying, degassing, and material transport. The Dry Screw Vacuum Pump for Freeze Drying Applications ensures product integrity during lyophilization.
Industrial Furnaces & Metallurgy
Used in vacuum brazing, sintering, annealing, and gas quenching. Ideal for special steel smelting and vacuum desulfurization due to its dust-handling capabilities.
Electrical & Power
Applications include transformer and mutual inductor drying, epoxy resin vacuum casting, capacitor oil immersion, and vacuum pressure impregnation (VPI).
Installation & Dimensions
External installation dimensions drawing LG-30G/H~LGB-70G/H
External installation dimensions drawing LGB-110G/H~LGB-450G/H
| Model | L0 | L1 | L2 | L3 | L4 | L5 | L6 | W0 | W1 | W2 | W3 | W4 | W5 | W6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LG30G/H | 1160 | 780 | 700 | 90 | 120 | 40 | - | 630 | 300 | 360 | 215 | - | - | - |
| LGB50G/H | 1160 | 780 | 700 | 90 | 120 | 40 | - | 630 | 300 | 360 | 215 | - | - | - |
| LGB70G/H | 1190 | 860 | 780 | 100 | 39 | 40 | - | 630 | 300 | 360 | 215 | - | - | - |
| LGB110G/H | 1852 | 910 | 810 | 50 | 5 | 460 | 420 | 910 | 570 | 130 | 520 | 25 | 260 | 385 |
| LGB150G/H | 1955 | 1020 | 920 | 50 | 35 | 520 | 433 | 1050 | 700 | 130 | 650 | 25 | 325 | 450 |
| LGB180G/H | 1955 | 1020 | 920 | 50 | 35 | 520 | 433 | 1050 | 700 | 130 | 650 | 25 | 325 | 450 |
| Model | H0 | H1 | H2 | D1 | D2 | D3 | d1 | d2 | d3/d6 | n1-φA | n2-φB | n3-φC | ||
| LG30G/H | 544 | 70 | 555 | 50 | 125 | 165 | 40 | 80 | 100 | 4-φ18 | 4-φ9 | 4-φ14 | ||
| LGB50G/H | 544 | 70 | 555 | 50 | 125 | 165 | 40 | 80 | 100 | 4-φ18 | 4-φ9 | 4-φ14 | ||
| LGB70G/H | 550 | 70 | 600 | 65 | 145 | 185 | 40 | 80 | 100 | 4-φ18 | 4-φ9 | 4-φ14 | ||
| LGB110G/H | 790 | 280 | 870 | 185 | 145 | 65 | 185 | 145 | 65 | 4-φ18 | 4-φ18 | 4-φ20 | ||
| LGB150G/H | 945 | 367 | 980 | 220 | 180 | 100 | 200 | 160 | 80 | 8-φ18 | 8-φ18 | 4-φ20 | ||
| LGB180G/H | 945 | 367 | 980 | 220 | 180 | 100 | 200 | 160 | 80 | 8-φ18 | 8-φ18 | 4-φ20 | ||
How to Select the Right Dry Screw Vacuum Pump
Choosing the correct Energy Efficient Dry Screw Vacuum Pump requires analyzing your specific process conditions. Ever-Power suggests considering the following factors:
- Gas Composition: Determine if the gas is corrosive, flammable, or contains solvents. For corrosive environments, we recommend our models with 2205/2507 duplex steel or C276 Hastelloy coatings.
- Liquid & Dust Handling: Unlike oil-sealed pumps, our dry screw pumps can handle dust and condensate. However, heavy particulate loads may require pre-filters.
- Required Vacuum Level: For high vacuum requirements, consider a Dry Screw Vacuum Booster Pump System where the screw pump acts as the backing pump for a Roots blower.
- Thermal Management: We offer Air or Water‑Cooled Dry Screw Vacuum Pumps. Ensure your facility has the appropriate cooling utilities (water flow/pressure) as listed in our specifications.
Need a Compact Dry Screw Vacuum Pump for Laboratory or a massive industrial unit? Contact our experts for a tailored calculation.
What Our Clients Say
"We replaced our liquid ring pumps with Ever-Power's LGB-150D for our solvent recovery system. The efficiency gains were immediate, and we no longer deal with wastewater treatment costs. Highly recommended for chemical processing."
— Operations Manager, Chemical Pharmaceutical Co.
"The corrosion resistance of the Hastelloy-coated screw pump is impressive. It has been running in our acid etching line for 18 months with minimal maintenance. A solid High Vacuum Dry Screw Pump solution."
— Plant Engineer, Semiconductor Manufacturer
Frequently Asked Questions (FAQ)
1. What distinguishes the Ever-Power dry screw pump from a claw pump?
While both are dry pumps, the screw design offers a straight gas path, making it superior for handling dust and condensable vapors without clogging. Our Dry Screw Vacuum Pump with Variable Pitch Rotors also provides better thermal efficiency compared to standard claw pumps.
2. Can these pumps handle explosive gases?
Yes. With the appropriate configuration (explosion-proof motors, nitrogen seals, and specific mechanical seals), our pumps are suitable for pumping flammable and explosive gases. Please specify these requirements when ordering.
3. Do I need to flush the pump after operation?
If your process involves corrosive gases or vapors that might crystallize or polymerize upon cooling, we recommend a purge cycle with nitrogen or dry air before shutdown to clean the pump chamber and ensure a long service life.
4. What is the maintenance interval?
Our pumps are designed as Low Maintenance Dry Screw Vacuum Pumps. Routine maintenance primarily involves checking/changing the gear oil and inspecting the cooling water flow. Major overhauls (bearings/seals) are typically required only after extended operation periods (e.g., 20,000+ hours), depending on the severity of the application.
5. Do you offer spare parts and accessories?
Yes, we provide a full range of Dry Screw Vacuum Pump Spare Parts and Accessories, including silencers, inlet filters, check valves, and repair kits, ensuring your production never stops.
Ready to Optimize Your Vacuum Process?
Additional information
| edited | by hyw |
|---|
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Product Quick Detail:
- Standard and non-standard available
- With high quality and competitive price
- Prompt delivery
- Packing as per customer’s demand.
We promise will offer the best price by the high quality in china! We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise that our products would be safety and were in high quality and reasonable price. If you are interested in our products, please contact us asap.We are sincerely looking for your cooperation.
Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.
Materials Available
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request
Surface Treatment
Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.
Processing Method
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
QC & Certificate
Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Package & Lead Time
Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port
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