The use of the steam jet vacuum pump with single-stage and multi-stage combination.
According to the nature of the medium is pumped steam jet vacuum pump is divided into two types.All is out of the non-condensable gas is pumped medium for Ⅰ type;Is pumped medium and non-condensable gas accounted for about 80%, the rest is no non-condensable gas for Ⅱ model.
Used in oil plant is usually the combination of 2 ~ 4 series Ⅱ type, the series can be required by the vacuum system vacuum degree.General requirements of available 2 levels of steam jet vacuum filter (http://www.palmmill.com/Products/proc/33.html).So-called grade 2 steam jet pump is composed of a single stage steam jet pump and 2 atmospheric condenser (or one).Two single pump structure, but different size, the front is larger, the smaller.Atmospheric condenser condenser assembly respectively, respectively, between the two steam jet pump, or between two jet pump with an atmospheric condenser.
High vacuum degree, must use level 3 or 4 levels of steam jet pump.Level 3 steam jet pump by three single stage of steam jet pump and two atmospheric condenser.Installed in front of the first level atmospheric condenser of single stage steam jet pump is also called a supercharger which role is to just take out the gas compression, increase the pressure inside the primary atmospheric condenser, made out in the gas condensable gases in the atmosphere is normal temperature in the condenser cooling water condensation, effectively improve the vacuum degree within the equipment.
Use level 3 steam jet pump, generally can reach 0.53 ~ 1300 mpa (4 ~ 10 MMHG) absolute pressure.If you want to achieve absolute pressure under 0530 mpa (4 MMHG), then use 4 steam jet pump.The so-called 4 steam jet pump, it is at level 3 in front of steam jet pump compression a supercharger to string a compressed a supercharger.Compress a supercharger points fixed nozzle type and adjustable nozzle type two kinds sunflower oil press...