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Vacuum pump selection considerations of _
factory have to consider when choosing a vacuum pump is able to meet their own needs, whether meet the requirements of their own industry. Let's look at some of the vacuum pump selection considerations.
1, the limit of the vacuum pump pressure should meet the process of work pressure. Choose the limit pressure of the water pump is lower than the technical requirements about an order of magnitude.
2, scope of each pump has a certain work pressure, therefore, the working point of the pump should be selected in the range of this, but can't let it work in foreign work allows pressure to for long time.
3, vacuum pump under pressure from their work, should be able to come in during the process of vacuum process equipment of all gas volume.
4, select vacuum unit:
( 1) When using a pump can not meet the requirement of the extraction and vacuum, need several pump combination, complement each other to meet the technological requirements.
( 2) Some vacuum pump can't work under atmospheric pressure, to a vacuum; Before some vacuum pump outlet pressure below atmospheric pressure, need to pump, pump old need combined use. By the combination of vacuum pump, we call it a vacuum pump unit, it will have good vacuum and vacuum system is recommended. We should properly select combination of vacuum pump, due to the different vacuum pump for pumping gas have different requirements, such as: roots - in the general case Rotary vane units shall not apply to contain more non-condensable gas system.
5, when you choose oil seal water pump, you should first understand whether your vacuum system of oil pollution have requirements. When equipment strict with oil free, should choose all kinds of oil pump, such as water ring pump, cryogenic pump, etc. If not strict, you can choose to have the oil pump, add some oil pollution prevention measures, such as cold trap and oil baffle well, damper etc. , can also meet the requirements of clean vacuum.
6, understanding is pumped gas composition, gas contains excluding condensable vapor, presence of dust particles, with or without corrosion, etc. Need to know when choosing a vacuum pump gas composition, gas is pumped to choose appropriate pump. If gas is contained in the steam, particles, and corrosive gas, should be considered in the pump inlet piping installation of auxiliary equipment, such as condenser, filter, etc.
7, when choosing oil seal vacuum pump, to consider the vacuum pump oil steam discharged ( Soot) How's impact on the environment. If pollution is not permitted in the environment, should choose oil-free vacuum pump, or the oil steam exhaust to the outside.
8, vacuum pump vibration of working with and without influence to the technological process and the environment, if the process does not allow, should choose no vibration of the pump and adopt measures to prevent vibration.
9, the price of the vacuum water pump, operation and maintenance.
after we considered all kinds of situation, to finally determine a suitable for your solution:
( 1) The smallest investment costs.
( 2) The smallest production operation cost.
( 3) The first two reasonable feasible scheme of uniform distribution.
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