Posted on Fri, 18 May 2018 07:55:45 +0000
Roots pump, also named as roots booster, its main function is increasing vacuum pressure. Single roots pump can reach 5*10-2Pa, suitable for application with working pressure ranging 103~10-1Pa. But traditional roots pump cannot be started separatly, it should be supported by mechanical pump (als...
Read MorePosted on Fri, 18 May 2018 07:49:53 +0000
EVP, as a world-famous brand in the field of liquid ring vacuum pump, is the choice of numerous customers. Then, compared to SIHI, what are EVP’s advantages? Firstly, product performance: Our 2BV can completely replace LEM series in performance, 2BE replaces LEH series and DLV replaces LPH series...
Read MorePosted on Fri, 18 May 2018 07:46:34 +0000
Molecular pump is a vacuum pump that transfer momentum to the gas molecules by high-speed rotation of the rotor to get directional speed, gas molecules will be compressed and was driven to the exhaust port. The molecular pumps are distinguished according to rotor structural characteristics as bel...
Read MorePosted on Fri, 18 May 2018 07:43:03 +0000
It often appear big noise and impeller cavitation problems during water ring vacuum pump running. Usually the reason is vacuum pump inlet pressure is too low, then resulting in rupture of the bubble. It can lead to vacuum pump’s rotor rupture and scrap when this situation become serious. When the...
Read MorePosted on Fri, 18 May 2018 07:37:36 +0000
The liquid ring vacuum pump and liquid ring compressor share same working principle, but their basic form and structure differs. The difference can be difined as following five aspects: 1. different circumferential velocity range of its mpeller The impeller circumferential velocity is mainly dete...
Read MorePosted on Fri, 18 May 2018 07:33:34 +0000
Vacuum system can be divided into low pressure vacuum system, high pressure vacuum system and ultra-high vacuum system according to the vacuum degree. Based on the properties of structural materials, it can be divided into glass system and metal system. According to the flow of gas in the system ...
Read MorePosted on Fri, 18 May 2018 07:26:28 +0000
Liquid ring vacuum pump can achieve 33mbar only, when the working vacuum is near to its ultimate vacuum, there will be cavitation. Simultaneously,liquid ring vacuum pump’s suction capacity decreased. To solve this problem, user can add an air ejector on liquid ring vacuum pump’s sucti...
Read MorePosted on Fri, 18 May 2018 07:23:59 +0000
Both EVP ZJ and ZJP belongs to roots pump. They are same in pumping principal, working curve and application. Pumping principal:effect through two”8”?shaped rotors in opposite direction to reach suction and exhaust. Schematic diagram as below: Feature of roots pump: The roots pump has to be work...
Read MorePosted on Fri, 18 May 2018 07:20:59 +0000
If the ultimate vacuum of the diffusion pump become bad or need to change the oil, the diffusion pump must be disassembled, cleaned and restarted assembly. 1, The disassembly of the diffusion pump (1), From top to bottom to disassemble the pump core. (2), Please keep cautious during the decomposi...
Read MorePosted on Fri, 18 May 2018 07:20:23 +0000
Generally speaking, we are required to calculate the required time from initial pressure to required pressure.So we should calculate it according to initial pressure, required pressure, volume of vacuum chamber.conversely,we could also select suitable pump according to initial pressure, required ...
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