Looking for recommendations for dry screw vacuum pumps
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I. Technical specifications 1. Quantity: 1 unit, oil-free 2. Vacuum pump pumping speed: 270 L/S 3. Gas composition: Ar: 23%, N2: 76%, H2: 1% 4. Exhaust pressure (under normal operation): ~50 KPa(G) (with a cycle time of 50 seconds; fluctuations within the range of 20–50 KPa(G)) 5. Suction pressure: ~-65 KPa(G) (with a cycle time of 50 seconds; fluctuations within the range of 0–-65 KPa(G)) 6. Suction temperature:
There are two issues: 2. The vacuum pump’s pumping speed: 270 L/S. Is this pumping speed the flow rate required under operating conditions or the maximum flow rate? 8. Intake air filtration: An intake air filter should be installed, taking into account the presence of solid molecular sieve (aluminosilicate) particles with a maximum size of 2 mm. Are there many aluminosilicate particles with even smaller sizes? Under the inhalation pressure and flow conditions you specified, what is the content of smaller particles of silicoaluminates?
1. Maximum pumping speed; it is desired that the equipment have a constant volume. 2. Under normal conditions, it is a clean gas with no impurities. Solid particles may appear in the event of an accident.
The medium of the oil-free screw vacuum pump ordered this time contains hydrogen (about 1%), and there are factors such as local high temperatures resulting from gas compression that pose a risk of hydrogen explosion. Therefore, we request your company to provide additional details regarding the technical design of the vacuum pump: 1. How does the vacuum pump ensure that the screw rotors do not come into contact with each other, thereby preventing the generation of sparks? Please explain this in terms of the rotor material, the manufacturing equipment used, and the precision of processing； 2. How does the surface treatment of the vacuum pump screw prevent friction and static electricity buildup? ； 3. How is the interior design of the vacuum pump designed to prevent localized accumulation of hydrogen molecules? ； 4. How does a vacuum pump ensure safety against the risks associated with pump jamming? Please explain this in terms of the design of bearings, transmission components, and bushings ；
18653370285 I hope this can help solve your problem
The design of conventional screw vacuum pumps in use domestically is limited by the transmission design, which generates an axial force between the conjugate rotors; as a result, the rotors exert additional axial forces on the bearings during compression, leading to an increased failure rate of these bearings. In a design that ensures 100% interference-free operation, changes are required to the bearing design on both sides, as well as to the loads and transmission mechanisms – CiscoVacuum’s latest product technologies feature these reliability characteristics. Normally, the source of static electricity generated during the operation of mechanical equipment comes solely from the rotation of moving parts; however, this is not always apparent. In accordance with relevant standards, to prevent the occurrence of static electricity, an interface for connecting an electrostatic grounding wire is provided on the pump body. Due to the properties of the gas medium, for hydrogen present in it, hydrogen enrichment is not a problem; what’s concerning is the inability to achieve such enrichment, the fact that it’s not possible to enrich the hydrogen! Given this, from the perspective of high reliability and safety, it is feasible to implement mist spraying cooling inside the screw vacuum pump’s chamber in order to reduce the compression temperature. In contrast to this, compared with water ring vacuum pumps, the advantage of the spray water circulation in screw vacuum pumps is that the sprayed water is used solely to remove the heat generated during compression, rather than to create a vacuum; therefore, compared with water ring vacuums, such pumps have no requirements regarding water volume or water pressure. Contact number: 13867689458, Li Jun
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Thank you for your answer. The dew point of the medium is very low, so water cannot be added to cool it down; a heat exchanger has been installed at the outlet of the vacuum pump to achieve cooling. Also, under the operating conditions we currently provide, what is the maximum exhaust temperature of the screw vacuum pump?
I have currently ordered products from two different manufacturers, and one set is scheduled to be turned on for testing next month. I will report any subsequent issues promptly. Thank you all for your attention and assistance! Thank you!