Best Ever Oil-Sealed Rotary Screw Vacuum Pumps
Adhering to highest standards based on 15 years mature experience
Hot Products
Top Picks for Cutting-Edge Performance
EVS 450
- Max. flow rate: 426 m³/h
- Motor power: 5.5 kW
- Cooling type: Air cooling
- Noise level: 55 – 70 dB
- Weight: 700 kg
EVS 1300
- Max. flow rate: 1285 m³/h
- Motor power: 22 kW
- Cooling type: Air cooling/Water cooling
- Noise level: 55 – 76 dB
- Weight: 1050 kg
EVS 6200
- Max. flow rate: 6180 m³/h
- Motor power: 110 kW
- Cooling type: Air cooling/Water cooling
- Noise level: 72 – 85 dB
- Weight: 5500 kg
Why Screw Vacuum Pump
Discover Unbeatable Features and Benefits
Smart Automation
Achieve peak operational efficiency with intelligent PLC and variable speed drive inverter (VSD).
Peak Performance
Crafted with robust construction and advanced technology to meet highest industry standards.
Energy Efficiency
Save on significant energy costs with our high-efficiency IE4 PM motor.
Quiet Operation
Enjoy a noise-free environment with operations as low as 55 dB.
Consistent Productivity
Trust in the stable vacuum performance for uninterrupted operations.
Remote Monitoring
Effortlessly monitor your pump status remotely by using a PC, Pad or Smartphone.
Comparison: Rotary Vane vs. Oil Screw Pump
Oil-sealed rotary screw vacuum pumps are increasingly favored over rotary vane, liquid ring, or rotary piston vacuum pumps due to their distinct and numerous advantages.
Rotary Vane Vacuum Pump
- IE2 motor, up to efficiency of 83%
- High power consumption without inverter
- High noise above 70 dB
- High oil evaporation during operation
- Frequent oil replacement required
- Many pumps needed to build a system
- Non-stable pressure from time to time
Screw Vacuum Pump
- IE4 PM motor, up to efficiency of 97%
- Power consumption saving up to 50%
- Quiet operation down to 55 dB
- Environmental-friendly super low emission
- Convenient long period oil change
- One integrated system with small footprint
- Stable vacuum for productivity
Cost Structure Analysis of Oil Screw Pump
Let’s take a closer look at the costs associated with owning an industrial vacuum pump throughout its lifespan. The analysis of the expenses highlights that energy consumption is the dominant cost. In details:
- 10%: Initial Purchase Cost
- 10%: Miscellaneous Costs
- 30%: Maintenance Costs
- 50%: Energy Consumption Cost
Opting for an energy-efficient vacuum pump can greatly reduce your overall expenses. You’ll enjoy substantial savings over time.
System Breakdown
Explore the Excellence Behind the Integrated Systems
Screw Bareshaft
- Twin-screw design with high reliability, high efficiency and low noise
- Absolute no leak due to non-shaft design at inlet
- Maximum ultimate pressure of 0.3 mbar
PM Electric Motor
- IE4 motor with super premium efficiency up to 97%
- IP55 enclosure, protection from dirt, dust and water
- Integrated PTC thermal protector inside motor winding
PLC and Inverter
- Smart operation due to PLC, vector power inverter and PM motor
- High efficient and durable INOVANCE inverter inside
- 6″ color touch screen
Cooling System
- High efficient with low noise
- Specially designed cooler controls pressure drop with sufficient load redundancy
- Thermostatic valve and sensor ensure proper working temperature
Inlet Filter
- Pre-filter design with 99% filtering efficiency @5 Micro
- Easy replacement of filter elements
- Polyester material available for vapory application
Inlet Control Valve
- Super low pressure differential improves pump efficiency
- The pump can operate at 500 mbar(a).
- External actuator or additional compressed air not required
Oil Separator
- Ultra-low oil exhaust, less than 3 ppm
- Small exhaust back pressure and power consumption due to super low separation pressure drop
- Optimized filter elements
Noise Reducer
- Soundproof fan in the box
- Thicker steel plate and sound absorbing foam efficiently isolate the noise
- Noise level is down to 55 dB(a).
Full synthetic vacuum oil
- Enhances vacuum pump performance
- High temperature resistance
- Ideal for vapor-intensive applications
Key Parameters
Harness the Power of Details for Your Perfect Pick
| Model | Flow Rate (m³/h) | Ultimate Pressure (mbar) | Motor Power (kW) | Noise (dB) | Inlet Connection | Outlet Connection | Weight (kg) |
|---|---|---|---|---|---|---|---|
| EVS 450 | 426 | 0.3 | 5.5 | 55-70 | G2 1/2 | G2 | 700 |
| EVS 550 | 545 | 0.3 | 7.5 | 55-70 | G2 1/2 | G2 | 700 |
| EVS 750 | 727 | 0.3 | 11 | 55-70 | DN100 | DN80 | 700 |
| EVS 950 | 963 | 0.3 | 15 | 55-74 | DN100 | DN80 | 1050 |
| EVS 1100 | 1112 | 0.3 | 18.5 | 55-76 | DN100 | DN80 | 1050 |
| EVS 1300 | 1285 | 0.3 | 22 | 55-76 | DN100 | DN80 | 1050 |
| EVS 1800 | 1751 | 0.3 | 30 | 65-79 | DN150 | DN100 | 1500 |
| EVS 2000 | 1925 | 0.3 | 37 | 65-79 | DN150 | DN100 | 1500 |
| EVS 3000 | 3052 | 0.3 | 45 | 67-80 | DN200 | DN150 | 3200 |
| EVS 3900 | 3863 | 0.3 | 55 | 67-80 | DN200 | DN150 | 3200 |
| EVS 4800 | 4870 | 0.3 | 75 | 72-85 | DN200 | DN150 | 5500 |
| EVS 5600 | 5632 | 0.3 | 90 | 72-85 | DN200 | DN150 | 5500 |
| EVS 6200 | 6181 | 0.3 | 110 | 72-85 | DN200 | DN150 | 5500 |
Why Choose Us
History in Brief
1980
Quincy Compressor launched the world’s first oil-sealed rotary screw vacuum pump, later expanding to China with a new Kunshan factory in 2004.
2010
The acquisition of Quincy by Atlas Copco led to a merged technological prowess, enabling them to maintain the new market dominance for over a decade.
2019
Everblue, established by Quincy’s ex-chief engineer and a veteran R&D team, rapidly emerged as a market leader in China, outshining industry giants with superior technology.
Why Choose Everblue
Each product is meticulously crafted to the highest standards.
Our advanced solutions align perfectly with your specific needs.
Enjoy superior quality without high price tag, thanks to our efficient production.
With 13 models, find the perfect fit for your varied flow rate requirements.
Develop Your Business With Best Oil Screw Vacuum Pumps
Projects & Applications
Navigating Through Our Project Achievements
Application: Chip Packaging
Application: CNC Machines
Application: Wookworking
Application: Semiconductor
Application: Paper Printing
Application: Display Pad Assembly
Application: Glass Manufacturing
Application: Brick Manufacturing
Application: Food Industry
Oil-Sealed Screw Vacuum Pump Ultimate Buying Guide
Become an Expert When Importing Oil-Sealed Screw Vacuum Pumps from China
Ultimate Buying Guide
Table of Contents
- What is an oil-sealed rotary screw vacuum pump?
- Are oil screw vacuum pumps suitable for medium and large flow rates?
- What factors should be considered when selecting an oil-sealed screw pump?
- Can oil-sealed rotary screw vacuum pumps handle moist or wet applications?
- Do you offer different versions of vacuum pumps for various industrial applications?
- How to choose the best oil screw vacuum pump manufacturer from China?
What is an oil-sealed rotary screw vacuum pump?
An oil-sealed rotary screw vacuum pump is an industrial device engineered for industrial vacuum applications, operating efficiently between atmospheric pressure and 100 Pa (1 mbar). It generates a vacuum using two intermeshing screws, with oil playing a crucial role in sealing, lubricating, and cooling the compression process.
The pump is valued for its consistent performance, low operating costs, and extended service intervals. A key feature is the integration of Variable Speed Drive (VSD) technology. VSD allows the pump to precisely match its speed to your system’s exact vacuum demand, leading to significant energy savings – often 30-50% compared to fixed-speed alternatives. This intelligent control also contributes to reduced heat generation and lower operational noise, enhancing workplace conditions. With fewer moving parts and efficient oil management, they offer exceptional reliability and are a robust solution for diverse, demanding industrial applications where uptime and efficiency are critical.
Are oil screw vacuum pumps suitable for medium and large flow rates?
Yes, absolutely. Oil-sealed rotary screw vacuum pumps are exceptionally well-suited for medium to large flow rate applications, making them an ideal choice for central vacuum systems.
Their high capacity and efficiency allow them to often replace multiple older, less efficient pumps with fewer, more powerful units. This consolidation results in:
Significant Energy Savings: Especially when combined with Variable Speed Drive (VSD) technology.
Reduced Footprint: Freeing up valuable floor space.
Lower Noise Levels: Creating a quieter working environment.
Enhanced System Stability: Providing a more reliable and consistent vacuum supply.
For example, a single modern oil screw pump model like an EVS 950 can effectively replace three traditional rotary piston pumps, or two EVS 1800 units can substitute for five water ring pumps, delivering superior performance even in compact facilities.
What factors should be considered when selecting an oil-sealed screw pump?
Selecting the right oil-sealed rotary screw vacuum pump involves evaluating several critical factors to ensure optimal performance, efficiency, and longevity for your specific application:
Required Vacuum Level & Pumping Speed (Flow Rate):
Vacuum Level: Determine the precise ultimate vacuum pressure your process demands. It’s important to note that these pumps typically operate effectively within the rough vacuum range, often around 200 – 400 mbar (A).
Pumping Speed (Flow Rate): Calculate the volume of gas that needs to be evacuated over time (e.g., in m³/hr or CFM) to achieve the desired cycle times. This is fundamental for sizing the pump correctly.
Application Environment & Gas Nature:
“Dry” vs. “Wet” Applications: Understand if the gas being pumped is clean and dry, or if it contains moisture or particulate matter. It is crucial to note that standard oil-sealed screw pumps are NOT suitable for pumping corrosive, explosive, toxic gases, or solvents. These substances require specialized vacuum technologies.
Temperature & Environmental Conditions: Consider ambient temperatures, humidity, and the presence of dust in the installation area.
Energy Efficiency & Operational Costs:
Variable Speed Drive (VSD): Prioritize pumps with VSD technology if your vacuum demand fluctuates, as this can lead to significant energy savings up to 70% compared with traditional liquid ring pumps.
Long-term Costs: Evaluate not just the initial purchase price, but also estimated energy consumption, oil changes, and planned maintenance expenses.
Maintenance & Reliability:
Service Intervals & Ease of Maintenance: Look for pumps with long service intervals and straightforward maintenance procedures to minimize downtime.
Robust Design: Consider the pump’s build quality and reputation for durability in industrial settings.
Noise Levels:
Workplace Impact: If the pump is located in or near a work area, low noise levels are crucial for operator comfort and regulatory compliance.
Installation & Footprint:
Available Space: Measure the physical space available for the pump, including clearance for maintenance.
Integration: Consider how easily the pump can be integrated into your existing vacuum system and control infrastructure.
By carefully evaluating these factors, and ensuring the pump’s compatibility with your gas stream, you can select an oil-sealed rotary screw vacuum pump that provides reliable, efficient, and cost-effective performance tailored to your operational needs.
Can oil-sealed rotary screw vacuum pumps handle moist or wet applications?
Yes, they are generally well-suited for applications involving moisture or moderate wetness.
Oil-sealed rotary screw vacuum pumps incorporate features and strategies to effectively manage vapor and prevent condensation, ensuring reliable operation:
Gas Ballast Valve: Many models are equipped with a gas ballast valve. This valve introduces a small amount of dry air into the compression chamber, effectively lowering the partial pressure of the condensable vapor. This prevents vapor from condensing into liquid within the pump, allowing it to be expelled as a gas.
Operating Temperature Management: Running the pump at a slightly higher operating temperature can also significantly aid in handling moisture. Elevated temperatures reduce the likelihood of water vapor condensing inside the pump.
For applications with excessive wetness or large amounts of free water, further measures are recommended to protect the pump and maintain performance:
Inlet Water-Oil Separator: Installing a dedicated water-oil separator at the pump’s inlet is highly advisable. This device efficiently separates bulk liquid water from the gas stream before it enters the pump, preventing contamination of the pump oil and ensuring consistent vacuum levels.
By using these features and, when necessary, external accessories, oil-sealed rotary screw vacuum pumps can maintain high efficiency and longevity even in challenging humid or wet environments.
Do you offer different versions of vacuum pumps for various industrial applications?
Yes, we do, but with a unique and highly adaptable approach.
Instead of offering multiple distinct pump versions (e.g., standard, humid, turbo, as some competitors might), we provide one highly versatile standard oil-sealed rotary screw vacuum pump model. This intelligent design allows it to be easily adapted to a wide range of industrial applications and diverse working conditions by simply adjusting operating parameters and selecting the appropriate oil.
This approach offers significant advantages:
Cost-Effectiveness: Adaptability often comes at minimal or no additional cost. For example, in vapor-rich environments like brick making, simply switching from standard mineral oil to a full synthetic oil is highly effective and incurs only the cost of the oil itself.
Simplified Inventory & Support: One core model means easier spare parts management and streamlined technical support.
Optimized Performance: Our standard model is engineered to deliver peak performance across its adjustable range, ensuring you always have the right solution.
Our priority is to configure our robust standard model to precisely meet your specific needs without unnecessary complexity or hidden charges, providing a tailored, efficient, and cost-effective vacuum solution.
Choosing the right oil screw vacuum pump manufacturer from China means focusing on reliability, quality, and comprehensive support. Here’s what to prioritize:
Reputation & Experience:
Look for manufacturers with a strong track record and proven expertise specifically in oil-sealed rotary screw vacuum pumps.
Check for international market presence and positive customer references.
Product Quality & Technology:
Verify relevant certifications (e.g., ISO 9001, CE for export).
Inquire about key component suppliers (e.g., motors, controls) – international brands indicate higher quality.
Assess their manufacturing quality control and testing.
Prioritize manufacturers who integrate modern technologies like Variable Speed Drive (VSD) for energy efficiency.
Technical Support & After-Sales Service:
Evaluate their responsiveness and knowledge during pre-sales consultation.
Confirm availability and lead times for spare parts.
Understand warranty terms and their process for post-purchase technical assistance and troubleshooting.
Customization & Flexibility:
A manufacturer offering a versatile standard model adaptable to various applications (e.g., through oil types, parameter adjustments) is highly beneficial.
Can they tailor solutions to your unique operational demands?
Communication & Transparency:
Assess their communication clarity and responsiveness.
Ensure they are transparent about product specifications and processes.
Value Proposition:
Look beyond the initial price to the Total Cost of Ownership (TCO), considering energy savings, maintenance, and expected lifespan.
Start by researching online, looking at their official websites and industry forums. Once you have a shortlist, engage them directly with detailed inquiries about your specific needs. Request data sheets, certifications, and even consider a factory audit if the investment is substantial.
By thoroughly evaluating these factors, you can significantly increase your chances of partnering with a reliable Chinese manufacturer that delivers high-quality oil screw vacuum pumps and excellent long-term support.
Most Popular Questions
For distributors, we offer a 12-month warranty for the entire system and an extended 24-month warranty for the rotary screw vacuum pump, starting from the sea shipment's Bills of Lading date. For other shipping methods, the warranty begins from the day we dispatch it from the factory.
Typically, we take about 4 to 6 weeks. But if we have everything ready in stock, we might get it to you in just 2 weeks!
We’re open to provide OEM service at the moment, in condition that the name of Everblue is mentioned as the provider on the machine.
Everblue is the most experienced and top-tier rotary screw vacuum pump manufacturer in China. As its strategic partner, Elitevak manages all export activities efficiently.
We prefer wire transfers (T/T) – 30% upfront and the balance before we ship your order. If we're racing against time and the lead time is under 3 weeks, we'd appreciate full payment upfront. It just helps speed things up!