Basic Info.
Structure
Reciprocating Vacuum Pump
Exhauster Method
Positive Displacement Pump
Product Description
1. The pumping system of ZJP series Roots vacuum pump is non-oil-sealed, so it can completely avoid oil return, oil leakage and oil fume pollution like oil-sealed vacuum pump.
2. ZJP series Roots vacuum pump has a higher pumping rate at lower inlet pressure, but it cannot be used alone. There must be a fore-stage vacuum pump in series, and the pressure in the system to be pumped is pumped to the Roots by the fore-stage vacuum pump The Roots vacuum pump starts to work only when the allowable inlet pressure of the vacuum pump is reached (see Figure 1).
3. In addition to the above structural features, ZJP series Roots vacuum pump with bypass valve also has automatic overload protection capability, but its pumping performance is the same as that of ZJ series Roots vacuum pump. A certain pumping rate and ultimate pressure. Therefore, the use of ZJP series vacuum pumps must also be equipped with a fore-stage vacuum pump in series. After the fore-stage vacuum pump is pumped to a certain pressure, the Roots vacuum pump will start to work (see Figure 2). Since the Roots vacuum pump is not allowed to work under high pressure difference, the fore-stage vacuum pump must be reasonably selected and the necessary protection devices must be installed while using the Roots vacuum pump. The backing vacuum pump is generally an oil-sealed mechanical pump. If the requirements for ultimate vacuum are not high, and the pumped object contains a large amount of water vapor, it is recommended to use a water ring vacuum pump as the backing pump.Product Photos:Working Principle: In the pump chamber, a pair of 8-shaped rotors are installed on a pair of parallel shafts perpendicular to each other, and a pair of gear belts with a transmission ratio of 1 act in a synchronous rotational motion opposite to each other. Between the rotors, between the rotor and the inner wall of the pump casing, there is a certain gap, which can realize high-speed operation. Since the Roots pump is a vacuum pump without internal compression, the compression ratio is usually very low, so a backing pump is required. The ultimate vacuum of the Roots pump depends not only on the structure and manufacturing accuracy of the pump itself, but also on the ultimate vacuum of the backing pump. In order to improve the ultimate vacuum degree of the pump, the Roots pump can be used in series and the working principle of the Roots pump is similar to that of the Roots blower. Due to the continuous rotation of the rotor, the pumped gas is sucked from the suction port into the space VO between the rotor and the pump casing, and then discharged through the exhaust port. Since the VO space is completely closed after inhalation, the gas in the pump chamber is not compressed and expanded.
However, when the top of the rotor turns over the edge of the exhaust port and the VO space communicates with the exhaust side, due to the high gas pressure on the exhaust side, a part of the gas recoils into the space VO, causing the gas pressure to suddenly increase. As the rotor continues to rotate, the gas is expelled from the pump.
Structure Description:
Fig.1 Structure diagram of ZJ Roots vacuum pump Fig.2 Structure diagram of ZJP series Roots vacuum pump 1.Air intake (connected to the pumped container) 2. Roots vacuum pump 3. Exhaust 4. Fore vacuum pump 5. Fore pipeline
a. Air intake (connected to the pumped container) b. Roots vacuum pump c. Exhaust d. Fore vacuum pump e. Fore pipeline f. Bypass valve g. Bypass pipelineProduct performance and parameters: | Model | Displacement
(L/s)
50Hz 60Hz | Ultimate Partial Pressure(Pa) | Ultimate Total Pressure(Pa) | Max. Permissible Diff. Pressure(Pa) | Max. Compression Rate with Zero Throughput | Motor Power
(kw) | Suction
(mm) | Discharge
(mm) |
| ZJ-75 | 75 90 | 0.03 | 0.5 | 10000 | 35 | 2.2 | 100 | 100 |
| ZJ-110 | 110 132 | 0.03 | 0.5 | 10000 | 35 | 2.2 | 100 | 100 |
| ZJ-150 | 150 180 | 0.03 | 0.5 | 8000 | 40 | 3 | 100 | 100 |
| ZJ-220 | 220 264 | 0.03 | 0.5 | 8000 | 40 | 3, 4 | 100 | 100 |
| ZJ-300 | 300 360 | 0.03 | 0.5 | 8000 | 40 | 4 | 200 | 100 |
| ZJ-600 | 600 720 | 0.03 | 0.5 | 5000 | 45 | 5.5, 7.5 | 220 | 150 |
| ZJ-1200 | 1200 1440 | 0.03 | 0.5 | 5000 | 50 | 11, 15 | 250 | 200 |
| ZJ-1800 | 1800 2160 | 0.03 | 0.5 | 3000 | 50 | 15 | 250 | 200 |
| ZJ-2500 | 2500 3000 | 0.03 | 0.5 | 3000 | 50 | 18.5, 22 | 300 | 250 |
| ZJ-5000 | 5000 6000 | 0.03 | 0.5 | 3000 | 55 | 37 | 400 | 300 |
| ZJP-150 | 150 180 | 0.05 | 0.8 | 8000 | 40 | 3 | 100 | 100 |
| ZJP-220 | 220 264 | 0.05 | 0.8 | 8000 | 40 | 3, 4 | 100 | 100 |
| ZJP-300 | 300 360 | 0.05 | 0.8 | 8000 | 40 | 4 | 150 | 100 |
| ZJP-600 | 600 720 | 0.05 | 0.8 | 5000 | 45 | 5.5 7.5 | 200 | 150 |
| ZJP-1200 | 1200 1440 | 0.05 | 0.8 | 5000 | 50 | 11 15 | 250 | 200 |
| ZJP-1800 | 1800 2160 | 0.05 | 0.8 | 3000 | 50 | 15 | 250 | 200 |
| ZJP-2500 | 2500 3000 | 0.05 | 0.8 | 3000 | 50 | 18.5 22 | 300 | 250 |
| ZJP-5000 | 5000 6000 | 0.05 | 0.8 | 3000 | 55 | 37 | 400 | 300 |
Product Application:
ZJP series Roots vacuum pump is a positive displacement vacuum pump, also known as mechanical booster pump. It is one of the main air extraction equipment for obtaining medium and high vacuum pumps. The rotor rotates synchronously in the pump casing to complete the process of suction and exhaust.
The advantage of ZJP series Roots vacuum pump is that it has a high pumping rate at a lower inlet pressure, and can reach a relatively high ultimate vacuum. Since the main parts of the pump directly used for air extraction, such as the pump casing, the rotor and the end cover, have no relative motion contact, the pump has stable running performance, long service life and low maintenance cost. At present, this kind of pump is widely used in vacuum smelting, vacuum welding, vacuum casting, vacuum spraying, vacuum drying, vacuum power experiment, chemical pharmacy, electric vacuum device manufacturing, etc. within the vacuum range that this type of pump can achieve. .
In view of the process of removing a large amount of water vapor and solvent in chemical, pharmaceutical and other industries, our company has improved the sealing structure of the pump cavity and bearing cavity of ZJ series Roots vacuum pump, which greatly reduces the oil emulsification phenomenon in the bearing cavity and gear cavity. It makes ZJP series Roots vacuum pump more suitable for pumping a large amount of water vapor and solvent with water ring vacuum pump.
The product meets the relevant requirements of JB/T7674-2005 "Roots Vacuum Pump".
The ZJ/ZJP series products referred to in this manual mainly include the following specifications:
ZJ/ZJP-30 ZJ/ZJP-70 ZJ/ZJP-150(A) ZJ/ZJP-300 ZJ/ZJP-600 ZJ/ZJP-1200 ZJ/ZJP-2500 ZJ/ZJP-5000
The Roots vacuum pump cannot be used alone. There must be a fore-stage vacuum pump in series. The pressure in the pumped system can only be started when the pressure in the pumped system is pumped by the fore-stage vacuum pump to the inlet pressure that the Roots vacuum pump can withstand. Otherwise, it will be damaged due to overload and overheating.
Product Features:
1. Larger pumping speed in a wide pressure range (1~1×104Pa).
2. The pump chamber is free of oil, which prevents oil vapor from polluting the vacuum system.
3. Small vibration and low noise.
4. The mechanical friction loss is small, so the driving power is small.
5. Easy to maintain and repair, low cost and long life.
6. Suspicious gas can be removed.
7. It cannot be used alone, and the foreline pump must be configured. It is not allowed to start under atmospheric pressure, and it can be started only when the foreline pump has pumped the inlet pressure of the roots pump to the allowable inlet pressure. The backing pump is generally a water-ring vacuum pump, an oil-ring vacuum pump, an oil-sealed mechanical pump, etc.
8. Improvements have been made to remove water vapor and organic solvents, and solve the problem of emulsification of pump oil in bearing chambers.
Company Profile:
Address:
Xiaodian Industrial Park, Baita Town, Boshan District, Zibo City, Shandong Province
Business Type:
Trading Company
Business Range:
Industrial Equipment & Components
Company Introduction:
Shandong Zhongbeng Power Equipment Co., Ltd. is located in Zibo City, Shandong Province, which is known as the "pump capital" of China. The company takes the lead in science and technology, adheres to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers. The products now have been exported to India, Pakistan, Russia, South Africa, Vietnam, Thailand and other countries.
Our products are widely used in petroleum, chemical industry, coal mine, metallurgy, electric power, food, medicine, paper making, textile, heating, refrigeration, urban water supply and drainage and other industries. The main products are: Vacuum pump, diesel engine pump set, diesel generator set, centrifugal pump, submersible sewage pump, chemical pump, corrosion-resistant pump and complete water supply equipment, etc. There are more than 20 series, with more than 1, 000 specifications for customers to choose from.
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