Basic Info.
After-sales Service
One Year
Screw Number
Double Screw Pump
Application
Sewerage Treatment, Food, Chemical
Transport Package
Wood Case
Product Description
Screw vacuum pump is the use of a pair of screw, made in the pump shell synchronous high-speed reverse rotation of the effects of the suction and exhaust and suction device, it is the upgrading production of oil seal type vacuum pump, to pump in addition to containing a large amount of water vapor and a small amount of dust gas occasions, in the domestic pharmaceutical industry, chemical industry, higher requirements for clean vacuum of companies such as semiconductor field widely used.Two screw fine dynamic balancing correction, and is supported by bearings, is installed in the pump shell, between screw and screw has a certain gap, so the pump is working, no friction between each other, smooth running, low noise, working cavity without lubricating oil, therefore, dry screw pump can pump in addition to containing a large amount of water vapor and a small amount of dust gas occasions, limiting vacuum is higher, lower power consumption, It has the advantages of energy saving and maintenance free. It is the replacement of oil seal vacuum pump.All kinds of vacuum pump increasingly under the influence of vacuum applications, the development of general vacuum system cannot meet the requirements of clean oil and corrosion resistance, so the dry vacuum pump market in great demand in recent years, vacuum products upgrading situation, have a lot of oil vacuum system has been replaced by oil free clean vacuum system. Almost every large vacuum company abroad produces various types of dry vacuum pumps. Screw vacuum pump belongs to non-contact dry pump, is a kind of ideal pump appeared in the early 1990s, with its wide pumping speed range, simple and compact structure, pumping chamber components without friction, long life, low energy consumption, no oil pollution and other advantages can be widely used.Due to its superior performance, dry screw vacuum pump has become the preferred vacuum acquisition equipment in microelectronics, semiconductor, pharmaceutical, precision processing and other industries in Europe, America and Japan. Based on screw compressor, Japan developed long rotor profile of vacuum pump very early and put it into the market. Several vacuum equipment companies in Germany have also gradually developed equal pitch and variable pitch rotor profiles, and done a lot of research on rotor and body cooling. In 2008, Chinese enterprises also put screw vacuum pump production into mass production, which has been well applied in chemical and pharmaceutical industriesThe drive shaft is connected with the active rotor, which is driven by the synchronous gear to rotate the driven rotor. The cooling water channel is opened on the shell to cool the temperature of the rotor and the exhaust port. The synchronous gear and the bearing are lubricated with oil, and the bearing and the shell are sealed by seals to achieve the effect of no oil. Dry screw vacuum pump with oil-free screw compressor in the sealing and lubrication structure is similar, the general vacuum pump exhaust end with mechanical seals, intake side is usually double-lip seal. In the transmission mode, the general is the direct motor, with a coupling and rotor connection, very few with a belt or drive chain transmission. Constant pitch screw pump due to no internal compression process, the exhaust temperature is very high, such as the cooling effect is not good, will cause the deformation of the rotor and shell, affect the pumping effect. Cooling the casing is an essential link, water cooling is the most common method, in the casing body, the outer bearing through the cooling water, can achieve the purpose of cooling the casing and then cooling the rotor.Similar to screw compressor, screw dry vacuum pump work process can be divided into suction, compression and exhaust three processes. As the rotor rotates, each pair of meshing teeth successively completes the same working cycle, now illustrated by one pair of teeth.Breathe in processThe positive rotor rotates counterclockwise and the negative screw rotates clockwise. The upper rotor end face is the suction section, and the lower end face is the exhaust end face.The compression processTurn to the end face is the exhaust end face. Here, the Yang rotor rotates clockwise and the Yin rotor rotates counterclockwise. The upper rotor end face is the suction section, and the lower end face is the exhaust end face.Exhaust processScrew pump exhaust process, the volume between teeth and exhaust orifice connected, that is, the exhaust process began. With the continuous reduction of the volume between the teeth, the gas with exhaust pressure is gradually discharged through the exhaust orifice.The performance characteristics of1. There is no medium in the working chamber, so a clean vacuum can be obtained2, the surface of the working cavity and screw rotor has anti-corrosion coating, can adapt to bad working conditions3, the gas in the pump without compression, suitable for extraction of coagulable gas4, a single pump can be pumped from the atmosphere to 1Pa, vacuum system can be greatly simplified.5. Water temperature has little influence on vacuum, saving water over 90%, and even does not consume water.6, no oil consumption, no dripping7, no friction between rotating parts, high speed operation, small size8. Simple structure and convenient maintenance.9, the pumped gas is directly discharged from the pump body, no pollution of water, no environmental pressure, more convenient gas recovery.10, with roots pump, molecular pump composed of oil-free unit | MODEL | Unit | LGB90 | LGB120 | LGB180 | LGB250 | LGB350 |
| Speed of suction | L/S | 90 | 120 | 180 | 250 | 350 |
| m3/hr | 324 | 432 | 648 | 900 | 1260 |
| Ultimate pressure | Pa | ≤20 | ≤10 | ≤10 | ≤10 | ≤10 |
| Motor power | Frequency | Hz | 50 | 50 | 50 | 50 | 50 |
| Voltage | v | 380 | 380 | 380 | 380 | 380 |
| Rated power | kw | 7.5 | 11 | 15 | 18.5 | 22 |
| Connection | Inlet | mm | DN50 | DN65 | DN100 | DN100 | DN150 |
| Outlet | mm | DN40 | DN50 | DN65 | DN65 | DN100 |
| Cooling water | Joint | | G1/2" | G3/4" |
| Flux | L/min | 12~15 | 15~20 |
| Pressure | Mpa | 0.1-0. |
| Temperature | ºC | ≤25 |
| Nitrogen | Pressure | Mpa | 0.05-0.10 |
| Sealed flux | L/min | 2-5 |
| Purge flux | L/min | 60-80 |
| Quick plug connector | | 12mm pipe |
| Pressure regulating valve | | Japan SMC |
| Water vapor | Pressure | Mpa | 0.15-0.2 |
| Purge flux | L/min | According to design |
| Quck plug connector | | 12mm pipe |
| Weight | kg | 340 | 365 | 600 | 648 | 1380 |
| Noise | dB(A) | 75 | 75 | 75 | 80 | 80 |
Address:
Zhujiang Road No. 687, Nanjing, Jiangsu, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Manufacturing & Processing Machinery
Company Introduction:
Nanjing Joyia Machinery Co., Ltd is one high technology Company focusing on compounding industry, we can offer high quality spare parts in Compounding industry such as barrels, shafts, screw elements, and vacuum system, all kinds of motors; We have a very dedicated team with rich experience and we are looking forward to cooperate with you to create more value and build up a much more prosperous future.
