Relationship and difference between ZJ&ZJP

Posted 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...

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Diffusion pump disassembly, cleaning and assembly

Posted 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...

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working time of Vacuum pump calculation formula

Posted 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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when to add by pass pipeline for your vacuum system

Posted 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...

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Piston vacuum pump applied to artificial stone industry

Posted 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...

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Roots-liquid ring vacuum system in styrene monomer and polystyrene application

Posted 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...

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Roots and liquid ring vacuum system application in vacuum distillation

Posted 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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Piston vacuum pump used in coconut oil(palm oil) bleaching process

Posted on Fri, 18 May 2018 07:07:44 +0000

In coconut& palm oil bleaching process, we should use vacuum pump to create vacuum for the agitator. Normally we use the piston vacuum pump 2H series model as working pump. Complete process PID as below: This system include: piston vacuum pump, water separator+tank+agitator+filter+transfer p...

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Difference Between Dry Screw Pump & Oil Lubricated Screw Pump

Posted on Fri, 18 May 2018 07:06:24 +0000

Oil lubricated rotate screw vacuum pump As per  figure (1), oil lubricated screw pump has oil filled on its rotor chamber, working as lubricant, sealant and coolant. This type of screw pump can achieve high capacity (according to one famous brand, the capacity range can be 400~5004m³/hr), but its...

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Vacuum pumps used in instant foodstuffs

Posted on Fri, 18 May 2018 07:01:33 +0000

Instant foodstuffs is one very important part in Japan and other countries nowadays. Some of the meals are always freeze-dried ready meals. By converting the vacuum technology from liquid ring, some of the foods are able to achieve considerable energy saving and easily made. Maybe all other remai...

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