Dry Screw Vacuum Pumps For Vacuum Furnace Industry
Ever-Power Dry Screw Vacuum Pumps offer oil-free, energy-saving performance. Featuring vacuum furnace industry-grade designs (LGB-Z Series) and general industrial models (LGB-G/H). Replace slide valve & liquid ring pumps today. Get a quote!
Performance Parameters
Designed specifically for harsh industrial environments like vacuum furnaces, offering high tolerance for dust and variable loads.
| Performance Parameter | Model LGB-70X-Z | Model LGB-110A-Z | Model LGB-180A-Z | Model LGB-230A-Z | Model LGB-300-Z |
|---|---|---|---|---|---|
| Pumping Speed (50Hz) (L/s) | 70 | 110 | 180 | 230 | 300 |
| Ultimate Total Pressure (50Hz) (Pa) | 5 | 5 | 5 | 5 | 5 |
| Max. Exhaust Pressure (bar) | 1.2 | 1.2 | 1.2 | 1.2 | 1.3 |
| Motor Power (50Hz) (kW) | 5.5 | 7.5 | 15 | 18.5 | 30 |
| Speed (50Hz) (rpm) | 2900 | 2900 | 2940 | 2950 | 2950 |
| Inlet Connection (mm) | 65 | 65 | 100 | 100 | 150 |
| Outlet Connection (mm) | 40 | 50 | 65 | 65 | 100 |
| Cooling Water Flow (L/min) | 10 | 12 | 13 | 13 | 20 |
| Pressure (MPa) | 0.2~0.35 | 0.2~0.35 | 0.2~0.35 | 0.2~0.35 | 0.2~0.35 |
| Outlet Water Temp. (℃) | ≤40 | ≤40 | ≤40 | ≤40 | ≤40 |
| Connection Port (mm) | 16 | 16 | 16 | 16 | 16 |
| Noise Level (dB(A)) | ≤75 | ≤76 | ≤76 | ≤78 | ≤85 |
| Grease Inlet Side (L) | 0.2 | 0.3 | 0.3 | 0.3 | 0.5 |
| Grease Outlet Side (L) | 0.8 | 1.2 | 1.8 | 1.8 | 3.4 |
| Nitrogen System Pressure (MPa) | 0.05 | 0.05 | 0.06 | 0.06 | 0.07 |
| Flow Rate (L/min) | 25-30 | 30-35 | 35-40 | 35-40 | 40-45 |
| Weight (Incl. Exhaust Tank) (kg) | 293 | 475 | 710 | 757 | 1142 |
Installation Dimensions (LGB110-230A-Z)
Model: LGB-110A-Z
| Parameter | Value | Parameter | Value | Parameter | Value |
|---|---|---|---|---|---|
| L0 | 1373 | W0 | 710 | H0 | 655 |
| L1 | 787 | W1 | 435 | H1 | 645 |
| L2 | 707 | W2 | 207 | D1 | 145 |
| L3 | 40 | W3 | 395 | D2 | 125 |
| L4 | 15 | W4 | 20 | D3 | 65 |
| L5 | 460 | W5 | 197.5 | d1 | 110 |
| L6 | 162 | W6 | 325 | d2 | 90 |
| n1-ØA | 4-Ø10 | d3 | 50 | ||
| n2-ØB | 4-Ø20 | n3-ØC | |||
| E | G1/2" | ||||
Model: LGB-180A-Z
| Parameter | Value | Parameter | Value | Parameter | Value |
|---|---|---|---|---|---|
| L0 | 1572 | W0 | 805 | H0 | 730 |
| L1 | 922 | W1 | 500 | H1 | 683 |
| L2 | 842 | W2 | 270 | D1 | 170 |
| L3 | 40 | W3 | 460 | D2 | 145 |
| L4 | 45 | W4 | 20 | D3 | 100 |
| L5 | 520 | W5 | 230 | d1 | 145 |
| L6 | 185 | W6 | 376 | d2 | 125 |
| n1-ØA | 8-Ø12 | d3 | 65 | ||
| n2-ØB | 4-Ø20 | n3-ØC | |||
| E | G3/4" | ||||
Model: LGB-230A-Z
| Parameter | Value | Parameter | Value | Parameter | Value |
|---|---|---|---|---|---|
| L0 | 1647 | W0 | 810 | H0 | 730 |
| L1 | 1002 | W1 | 500 | H1 | 683 |
| L2 | 902 | W2 | 270 | D1 | 170 |
| L3 | 50 | W3 | 460 | D2 | 145 |
| L4 | 35 | W4 | 20 | D3 | 100 |
| L5 | 595 | W5 | 230 | d1 | 145 |
| L6 | 185 | W6 | 376 | d2 | 125 |
| n1-ØA | 8-Ø12 | d3 | 65 | ||
| n2-ØB | 4-Ø20 | n3-ØC | |||
| E | G3/4" | ||||
What is a Dry Screw Vacuum Pump?
A dry screw vacuum pump is a positive displacement pumping device that utilizes a pair of meshing screws rotating synchronously at high speed in opposite directions within a pump casing to generate suction and exhaust. The key to its efficiency lies in its precision engineering: the two screws are dynamically balanced and supported by bearings, installed with a microscopic clearance between them.
Because there is no contact between the rotors, the pump operates without friction and requires no working medium (oil or water) in the compression chamber. This "dry" operation allows the pump to remove gases containing large amounts of condensable vapors and dust without contamination. It serves as the ideal environmentally friendly replacement for oil-sealed mechanical pumps, liquid ring vacuum pumps, and reciprocating vacuum pumps.
Upgrade your industrial process with Ever-Power's advanced Dry Screw Vacuum Pumps. Engineered to replace traditional oil-sealed and liquid ring systems, our pumps deliver a clean, oil-free vacuum with superior energy efficiency. Whether for vacuum furnaces, chemical processing, or pharmaceutical manufacturing, our robust screw technology ensures stable operation under the most demanding conditions.
Why Choose Ever-Power Screw Pumps?
- 1. Vacuum Furnace Industry-Grade Design
Specifically engineered to solve the pain points of the vacuum furnace industry. Our design completely eliminates the cumbersome problems caused by frequent oil changes and emulsification found in traditional slide valve pumps. - 2. 100% Oil-Free & Eco-Friendly
With no oil in the compression chamber, there is no oil backstreaming to contaminate your process or product. This makes it easier to recover solvents and protects the environment. - 3. Supports Online Cleaning
Designed for high uptime, our pumps support flushing and cleaning without the need for disassembly, significantly reducing downtime for maintenance. - 4. Robust & Low Maintenance
The non-contact design means fewer wearing parts. Combined with a robust structure, this results in a pump that is safe, reliable, and offers exceptionally low long-term maintenance costs.
General Industrial Screw Pumps (LG/LGB-G/H Series)
Standard reliable models for general vacuum applications, chemical processing, and solvent recovery.
| Model | Unit | LG30G/H | LGB50G/H | LGB70G/H | LGB110G/H | LGB150G/H | LGB180G/H |
|---|---|---|---|---|---|---|---|
| Pumping Speed (50Hz) | L/S | 30 | 50 | 70 | 110 | 150 | 180 |
| m³/h | 108 | 180 | 250 | 400 | 540 | 650 | |
| Ult. Pressure | Pa | 50 | |||||
| Motor Power | kW | 4 | 4 | 5.5 | 11 | 18.5 | 18.5 |
| Connection | Inlet (mm) | 50 | 50 | 65 | 65 | 100 | 100 |
| Outlet (mm) | 40 | 40 | 40 | 65 | 80 | 80 | |
How to Select the Right Dry Screw Vacuum Pump
Choosing the correct vacuum pump ensures process efficiency and longevity. Consider the following factors:
- Application Type: For vacuum furnaces or high-dust environments, choose our LGB-Z Series. For general chemical or pharmaceutical processes, the LGB-G/H Series is ideal.
- Required Vacuum Level: Determine if your process needs rough vacuum or high vacuum (check the Ultimate Pressure Pa value).
- Pumping Speed: Calculate the volume of gas to be evacuated per hour (m³/h) to match the pump capacity.
- Gas Composition: If the gas is corrosive (e.g., chlorides), consult us for special coatings or material upgrades (like Nickel or Hastelloy).
What Our Customers Say
"Switching to the Ever-Power LGB180A-Z for our vacuum annealing furnace was a game changer. We used to change oil weekly on our old slide valve pumps. Now, maintenance is almost non-existent."
- Operations Manager, Heat Treatment Facility
"Excellent solvent recovery rates. The dry operation means we don't have to deal with contaminated water disposal anymore. Highly recommended for pharmaceutical drying."
- Engineering Lead, Bio-Pharma Company
Frequently Asked Questions (FAQ)
1. What is the main advantage of a screw vacuum pump over a liquid ring pump?
The main advantage is the "dry" operation. Screw pumps do not require water or oil as a sealant, eliminating the cost of treating contaminated water and allowing for easy recovery of process solvents.
2. Can these pumps handle corrosive gases?
Yes. Standard models handle many industrial gases. For highly corrosive environments, we offer anti-corrosion coatings (like Ni-P) or special materials (like Hastelloy) for the screws and casing.
3. How often is maintenance required?
Maintenance is minimal compared to oil-sealed pumps. Typically, you only need to check/replace the gear oil and bearing grease every 3000-5000 hours, depending on operating conditions.
4. Does the pump require cooling water?
Yes, the pump casing is jacketed for cooling water to maintain optimal operating temperatures. Refer to the specification table for flow rates.
5. Is it possible to clean the pump without taking it apart?
Yes, our pumps support online cleaning. You can introduce a solvent or steam into the inlet to flush out deposits while the pump is running at low speed or idling.
Ready to Upgrade Your Vacuum System?
Contact Ever-Power today for a custom quote on our Dry Screw Vacuum Pumps. Our experts are ready to assist with model selection.
Additional information
| edited | by hyw |
|---|
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