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**DRF Series Roots Vacuum Pumps**
**Product Overview**
The DRF Series Roots Vacuum Pump is a technically advanced vacuum pumping system that significantly enhances the working range of fore vacuum pumps under low inlet pressure conditions. This pump is designed to work in conjunction with other vacuum systems, offering improved performance and efficiency.
**Key Advantages**
1. **Enhanced Vacuum Degree**
Equipping your system with a Roots vacuum pump can increase the vacuum level by one order of magnitude. With a two-stage Roots pump, the performance can be even further improved.
2. **Increased Pumping Speed**
The rotors in the Roots pump rotate without contact, allowing for high pumping speeds even in smaller units. By selecting an appropriate Roots pump, the fore vacuum pump can handle large volumes of air at lower speeds, reducing energy consumption compared to using a single fore vacuum pump with the same speed.
3. **Oil-Free Operation**
The pump chamber is free of oil, ensuring no contamination of the pumped medium.
4. **Superior Performance Features**
- The flexible hydraulic transmission system ensures efficient power transfer, resulting in a compact design and excellent performance.
- It eliminates the need for bypass pipes and valves, reducing hardware costs and simplifying control requirements.
- The hydraulic system automatically adjusts the pumping speed, preventing motor overload or overheating under high-pressure conditions.
- The pump can start simultaneously with the fore vacuum pump at atmospheric pressure without overloading the motor, shortening the pumping time and improving efficiency.
- Smooth operation with minimal vibration and reliable bearing sealing ensure long-term durability.
- No bypass or valves are required, making maintenance simple and straightforward.
**Applications**
- **Industrial Use**: Medical technology, industrial leak detection, electron beam welding, vacuum isolation, lamp/tube manufacturing, heating processes, vacuum drying, lyophilization, vacuum furnaces, and metallurgical engineering.
- **Research & Development**: Nuclear research, melt technology, plasma research, spatial simulation, low-temperature research, nanotechnology, and biotechnology.
- **Coating & Metallization**: Flat-panel displays (FPD), LED/OLED, hard disk coating, photovoltaic cells, glass-type coating, CD/DVD/Blue-ray, optical filming, and wear-resistant coatings.
- **Semiconductor Industry**: Photoetching, printing, physical vapor deposition (PVD), chemical vapor deposition (CVD), plasma etching, ion implantation, beam injection, viewing, gluing, and molecular beam epitaxy.
**Technical Parameters**
| Model | Unit | R300 | R500 | R750 | R1000 | R2200 | R3600 |
|-----------|------|-------|-------|-------|--------|--------|--------|
| Type | Unit | 50Hz | 50Hz | 50Hz | 50Hz | 50Hz | 50Hz |
| Nominal Pumping Speed (m³/h) | m³/h | 300 | 540 | 750 | 1000 | 2200 | 3600 |
| Nominal Pumping Speed (L/s) | L/s | 83 | 150 | 208 | 278 | 611 | 1000 |
| Ultimate Total Pressure | Pa | <2 | <2 | <2 | <2 | <1 | <1 |
| Motor Power | kW | 1.5/2.2 | 1.5/2.2 | 3.0/4.0 | 3.0/4.0 | 7.5/11 | 7.5/11 |
| Motor Speed | rpm | 2900 | 2900 | 2900 | 2900 | 2900 | 2900 |
| Noise | dB(A) | 64 | 64 | 68 | 68 | 73 | 73 |
| Inlet (DN) | DN | ISO63 | ISO100| ISO160| ISO160 | ISO160 | ISO250 |
| Outlet (DN) | DN | ISO40 | ISO63 | ISO100| ISO100 | ISO100 | ISO100 |
| A-end Oil Capacity | Liter| 1.5 | 1.5 | 2.4 | 2.4 | 6.8 | 6.8 |
| B-end Oil Capacity | Liter| 0.8 | 0.8 | 1.3 | 1.3 | 3.7 | 3.7 |
| Sealing Oil Capacity | Liter| 0.13 | 0.13 | 0.13 | 0.13 | 0.15 | 0.15 |
| Cooling Water Connection | Inch | 1/4" | 1/4" | 3/8" | 3/8" | 3/8" | 3/8" |
| Weight | kg | 79 | 92 | 130 | 155 | 330 | 410 |
| Dimensions (mm) | mm | 783×323×324 | 863×323×304 | 932×330×384 | 992×330×384 | 1125×522×519 | 1365×522×519 |
*Note: Specifications are subject to change without prior notice.*
**FAQs**
**Q1: Are you a factory or a trading company?**
A1: We are a factory.
**Q2: What is the exact address of your factory?**
A2: No. 10, Xinhao Road, Jinshan District, Shanghai City, China.
**Q3: What is the warranty period for your machines?**
A3: Two years warranty for the machine, with technical support available as needed.
**Q4: Do you provide spare parts for the machines?**
A4: Yes, we do.
**Q5: How long does it take to arrange production?**
A5: For 380V 50Hz, we can deliver within 10 days. For other voltage or color options, delivery takes up to 22 days.
**Q6: Can you accept OEM orders?**
A6: Yes, with our professional design team, OEM orders are highly welcome.
**Contact DENAIR**
**Company Name:** DENAIR Energy Saving Technology (Shanghai) PLC
**Phone:** +86-021-61278021
**Fax:** +86-021-57865043
**Website:** [www.denair.net](http://www.denair.net)