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**DRF Series Roots Vacuum Pumps**
**Product Overview**
The DRF series roots vacuum pump is a technically advanced and reliable vacuum pumping equipment, designed to work in conjunction with a fore vacuum pump. This combination significantly expands the working range under low inlet pressure conditions, making it ideal for various industrial and scientific applications.
**Key Advantages**
1. **Enhanced Vacuum Degree**
When combined with a fore vacuum pump, the system can achieve an order of magnitude improvement in vacuum level. With a two-stage roots pump, even better performance can be achieved.
2. **Increased Pumping Speed**
The rotors of the roots pump operate without contact during high-speed rotation, allowing small-sized pumps to deliver high pumping speeds. This makes it more energy-efficient compared to 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 hydraulic transmission system ensures smooth operation, reducing wear and tear on components.
- It automatically adjusts pumping speed, preventing motor overload or overheating under high-pressure conditions.
- The design allows for quick start-up at atmospheric pressure without overloading the motor, shortening pumping time.
- The compact structure and smooth running reduce vibration and noise levels.
- A reliable bearing sealing system prevents lubricant from entering the pump chamber.
- No bypass pipes or valves are required, simplifying maintenance.
**Applications**
- **Industry**: Medical technology, industrial leakage detection, electron beam welding, vacuum isolation, lamp and tube manufacturing, heating processing, vacuum drying, lyophilization, vacuum furnaces, metallurgical engineering.
- **R&D**: Nuclear research, melt technology, plasma research, spatial simulation, low-temperature research, nanotechnology, biotechnology.
- **Coating & Metallization**: FPD (flat-panel display), LED/OLED, hard disk coating, photovoltaic cells, glass-type coating, CD/DVD/Blue Ray, optical filming, wear-resistant coatings.
- **Semiconductor**: Photoetching, printing, physical vapor deposition, chemical vapor deposition, plasma etching, ion implantation, molecular beam epitaxy.
**Technical Specifications**
| Model | Unit | R300 | R500 | R750 | R1000 | R2200 | R3600 |
|-------|------|------|------|------|--------|--------|--------|
| Type | Unit | 50Hz | 50Hz | 50Hz | 50Hz | 50Hz | 50Hz |
| Nominal Pumping Speed | m³/h | 300 | 540 | 750 | 1000 | 2200 | 3600 |
| Nominal Pumping Speed | 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 | ISO63 | ISO100 | ISO160 | ISO160 | ISO160 | ISO250 |
| Outlet | 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 | 783×323×324 | 863×323×304 | 932×330×384 | 992×330×384 | 1125×522×519 | 1365×522×519 |
*Specifications are subject to change without prior notice.*
**Frequently Asked Questions (FAQ)**
**Q1: Are you a factory or trade 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 machine?**
A3: Two years warranty for the machine, along with technical support as needed.
**Q4: Do you provide spare parts for the machines?**
A4: Yes, we do.
**Q5: How long will it take to arrange production?**
A5: For 380V 50Hz, we can deliver within 10 days. For other power supplies or colors, delivery takes about 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:** http://www.denair.net