Posted 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 ...
Read MorePosted on Fri, 18 May 2018 07:19:07 +0000
Many users always confused about when to adopt by pass pipeline for their system. To understand whether by pass pipeline is necessary, we should firstly understand its function, below sketch can be good explanation: Generally, the evacuating time is main factor to decide whether to use by pass p...
Read MorePosted on Fri, 18 May 2018 07:17:49 +0000
Piston vacuum pump principle are similar to rotary vane vacuum pump but the structure is different. Piston vacuum pump use slide valve mechanism to change the suction chamber volume, so it is also called slide valve pump. Although it is an old pump, compare to the rotary vane pump, it is high wor...
Read MorePosted on Fri, 18 May 2018 07:15:46 +0000
In styrene monomer and polystyrene plants are needed lots of vacuum systems generally, and some of the vacuum columns require vacuums of 10 mmHg A or better. Steam jet ejector were the standard vacuum producers for such applications in the past. A major drawback to using steam has been the contam...
Read MorePosted on Fri, 18 May 2018 07:14:22 +0000
Vacuum distillation principle: with the help of the vacuum pump to reduce the pressure inside of system, then it can reduce the boiling point of liquid, some organic compounds can be distilled at a much lower than the normal boiling point temperature. Part 1, The relevant parameters of roots liqu...
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