How to Choose Vacuum Pump Accurately
from web site
When picking the vacuum pump, the subsequent issues shall be observed:
The operating force of vacuum pump ought to fulfill the demands of restrict vacuum and doing work force of vacuum products. For instance, vacuum coating requires a vacuum degree of 1 × 10-5mmhg, and the vacuum diploma of the selected vacuum pump shall be at the very least five × ten-6mmhg. Typically, the vacuum diploma of the pump is half to 1 order of magnitude increased than that of the vacuum tools.
Select the functioning point of vacuum pump properly. Each and every kind of pump has a specified doing work pressure range, for case in point: the diffusion pump is ten-three ~ ten-7mmhg. In this kind of a wide pressure range, the pumping speed of the pump changes with the stress, and its steady operating strain selection is 5 × ten-four ~ 5 × ten-6mmhg. For that reason, the functioning position of the pump must be selected inside this range, and it cannot be allowed to perform for a extended time under 10-8mmhg. Vccuum pump is that titanium sublimation pump can work at ten-2mmhg, but its operating stress must be significantly less than 1 × 10-5mmhg.
Underneath its functioning stress, the vacuum pump need to be in a position to discharge all the gasoline produced in the approach of vacuum tools.
Blend the vacuum pump properly. Since of the selective pumping of vacuum pump, sometimes deciding on a single pump can not meet the pumping needs. Several pumps require to be blended to health supplement each other to fulfill the pumping requirements. For instance, the titanium sublimation pump has a very higher pumping pace for hydrogen, but it can’t pump helium, whilst the a few pole sputtering ion pump (or the two pole asymmetrical cathode sputtering ion pump) has a specified pumping pace for argon, and the blend of the two will make the vacuum system get a far better vacuum degree. In addition, some vacuum pumps can’t function underneath atmospheric force and need pre vacuum some vacuum pumps need to have pre phase pumps simply because the outlet strain is reduced than atmospheric stress, so they require to be mixed for use.
Needs of vacuum tools for oil air pollution. If the gear is strictly oil-free of charge, different oil pumps need to be chosen, this kind of as: water ring pump, molecular sieve adsorption pump, sputtering ion pump, reduced temperature pump, and so on. If the demands are not stringent, oil pump can be selected, and some anti oil air pollution measures, this sort of as cold entice, baffle, oil lure, and so forth., can also meet up with the specifications of clean vacuum.
Know the composition of the extracted gasoline, like no condensable vapor, particle dust, corrosiveness, and so on. When choosing a vacuum pump, it is needed to know the gasoline composition and choose the corresponding pump for the extracted gas. If the fuel consists of steam, particles and corrosive gas, auxiliary tools, these kinds of as condenser, dust remover, and so on., shall be installed on the air inlet pipeline of the pump.
How does the oil vapor discharged from the vacuum pump affect the setting. If the surroundings is not authorized to be polluted, the oil-free vacuum pump can be selected, or the oil vapor can be discharged to the out of doors.
Whether the vibration produced for the duration of the procedure of vacuum pump affects the method and atmosphere. If the approach is not allowed, the pump with out vibration shall be selected or anti vibration steps shall be taken.
Cost, procedure and servicing expense of vacuum pump
The operating force of vacuum pump ought to fulfill the demands of restrict vacuum and doing work force of vacuum products. For instance, vacuum coating requires a vacuum degree of 1 × 10-5mmhg, and the vacuum diploma of the selected vacuum pump shall be at the very least five × ten-6mmhg. Typically, the vacuum diploma of the pump is half to 1 order of magnitude increased than that of the vacuum tools.
Select the functioning point of vacuum pump properly. Each and every kind of pump has a specified doing work pressure range, for case in point: the diffusion pump is ten-three ~ ten-7mmhg. In this kind of a wide pressure range, the pumping speed of the pump changes with the stress, and its steady operating strain selection is 5 × ten-four ~ 5 × ten-6mmhg. For that reason, the functioning position of the pump must be selected inside this range, and it cannot be allowed to perform for a extended time under 10-8mmhg. Vccuum pump is that titanium sublimation pump can work at ten-2mmhg, but its operating stress must be significantly less than 1 × 10-5mmhg.
Underneath its functioning stress, the vacuum pump need to be in a position to discharge all the gasoline produced in the approach of vacuum tools.
Blend the vacuum pump properly. Since of the selective pumping of vacuum pump, sometimes deciding on a single pump can not meet the pumping needs. Several pumps require to be blended to health supplement each other to fulfill the pumping requirements. For instance, the titanium sublimation pump has a very higher pumping pace for hydrogen, but it can’t pump helium, whilst the a few pole sputtering ion pump (or the two pole asymmetrical cathode sputtering ion pump) has a specified pumping pace for argon, and the blend of the two will make the vacuum system get a far better vacuum degree. In addition, some vacuum pumps can’t function underneath atmospheric force and need pre vacuum some vacuum pumps need to have pre phase pumps simply because the outlet strain is reduced than atmospheric stress, so they require to be mixed for use.
Needs of vacuum tools for oil air pollution. If the gear is strictly oil-free of charge, different oil pumps need to be chosen, this kind of as: water ring pump, molecular sieve adsorption pump, sputtering ion pump, reduced temperature pump, and so on. If the demands are not stringent, oil pump can be selected, and some anti oil air pollution measures, this sort of as cold entice, baffle, oil lure, and so forth., can also meet up with the specifications of clean vacuum.
Know the composition of the extracted gasoline, like no condensable vapor, particle dust, corrosiveness, and so on. When choosing a vacuum pump, it is needed to know the gasoline composition and choose the corresponding pump for the extracted gas. If the fuel consists of steam, particles and corrosive gas, auxiliary tools, these kinds of as condenser, dust remover, and so on., shall be installed on the air inlet pipeline of the pump.
How does the oil vapor discharged from the vacuum pump affect the setting. If the surroundings is not authorized to be polluted, the oil-free vacuum pump can be selected, or the oil vapor can be discharged to the out of doors.
Whether the vibration produced for the duration of the procedure of vacuum pump affects the method and atmosphere. If the approach is not allowed, the pump with out vibration shall be selected or anti vibration steps shall be taken.
Cost, procedure and servicing expense of vacuum pump
