August 2018 addendum 1 to standards for steam jet vacuum systems, 7th edition. The heat exchange institute hei has released the 11th edition of standards for steam surface condensers. Therefore, a group of process engineering standards areprepared to cover the subject. Hei standards for steam jet vacuum systems 5th q6ngzzpkgjlv. If the steam supply is dry, the cooling water clean and the materials of construction matched properly to the corrosive nature of the process fluids, steam jet vacuum systems can and do last. Technology and applications gea engineering for a better world. Steam jet ejectors are based on the ejectorventuri principle. Oct 24, 2012 condenser temperature of the second stage. The fifth edition of standards for steam jet vacuum systems builds on the fourth editions integration and update of three previous hei documents. You can be sure that everything will meet our quality of standards as well as applicable u. Multistage jet vacuum pumps are used to create and maintain the vacuum. The design characteristics of air removal equipment are outlined in the heat exchange institute standards for steam surface condensers. Based upon the use of auxiliary equipment, two and threestage ejectors can either be condensing or noncondensing types. The standard vacuum drop test procedure used for accs is described in standards for steam jet vacuum systems, 6.
Staging of ejectors becomes necessary for economical operation as the absolute suction pressure decreases. Hei 28662012 english standards for steam jet vacuum systems7th, boxue58. Process technology can a steam jet ejector fit your vacuum process. The figure on the right illustrates a 3stage system.
Standards for steam jet ejectors heat exchange institute. Standards and typical specifications for tray type. Fellow forum members, i am working on a vacuum system and looked for a resource to estimate the air infiltration into the various vessels that are connected to the vacuum system, and i came across the following resource. Standards for air cooled condensers, 2nd edition hei 121 currently viewing. Standards for air cooled condensers, 2nd edition hei 121. Steel calculated capacity cast iron class 30 steel critical flow cubic design steam pressure diameter discharge pressure dry air ejector stage ejector units entrainment ratio curve equation. Hei steam jet vacuum systems troubleshooting guide steam jet vacuum systems are fundamentally reliable vacuum producers as they have no moving parts. H k industries manufacturer of steam jet ejector systems.
Product gallery steam jet vacuum systems back to gallery. Steam jet vacuum ejectors in the edible oil and related industries the basic idea for the design of steam jet ejectors has to be considered in that way that the available raw materials and available energy in which ever form that they take should be converted with the least possible waste and therefore the best possible efficiency. Hei standards for steam jet vacuum systems 5th free download as pdf file. Always sweep or vacuum the floor prior to use to remove any loose dirt or move the cleaner slowly backwards and forwards paying particular attention to high debris. Hei standards for steam jet vacuum systems 5th october 2019 178.
Standards for steam surface condensers, 12th edition hei 118 standards for gasketed plate heat exchangers, 1st edition hei 126 standards for steam jet vacuum systems, 7th edition hei 125 standards and typical specifications for tray type deaerators, 10th edition hei 120 standards for air cooled condensers, 2nd edition hei 121. November 2016 standards and typical specifications for tray type deaerators, 10th edition hei 120. Technology and applications gea engineering for a better. It would be better if you can get hold of the standard.
Maintenance, efficiency, and reliability of the vacuum components are. Steam jet vacuum pumps 2 low or fluctuating steam pressure. Vacuum system air leakage calculation question posted in industrial professionals. Reaction polyester condensation organic esterification. Steamjet vacuum systems combine ejectors, condensers and interconnecting piping to provide relatively lowcost and lowmaintenance vacuum pumping. This standard has been developed by the vacuum technology section of the heat exchange institute, inc. Nov 01, 2016 the suitability of vacuum pump or steam jet air ejector systems for a given application depends on the availability of motive steam during startup, the costs associated with the usage of steam or electricity and the preferences of the end user. We are also a proud member of the heat exchange institute hei. Standard code standard title ipsepr745 \process design of vacuum equipment vacuum pumps and ipsepr750 steam jet ejectors\ ipsepr755 \process design of compressors\ \process design of fans and blowers.
The primary purpose of hei is to develop and publish standards which advance the technology, increase the. There are different options of korting vacuum systems with surface condensers available. The attached article has a equation english units as given in the standards for steam jet vacuum systems published by heat exchange institute hei. Steam ejectors provide vacuum in many process industries and utility companies. Steam jetejectors educt process gases into the steam chest and then through a specially understand realworld problems of vacuum ejector performance use these guidelines and case histories to evaluate and troubleshoot ejector systems condensables vacuum column overhead. Foreword this addendum to the 7th edition of the heat exchange institute standards for steam jet vacuum systems provides new material for the. Nash has been designing, manufacturing and troubleshooting steam jet air ejector systems since 1986.
If the pressure is low, the steam nozzles can probably be altered to suit the existing conditions. Highpressure motive steam enters through a steam nozzle. H k industries manufacturer of steam jet ejector systems and. Find steam jet ejector vacuum systems related suppliers, manufacturers, products and specifications on globalspec a trusted source of steam jet ejector vacuum systems information. Distillation models for simulation free download as powerpoint presentation. The heat exchange institute hei is a nonprofit trade association committed to the technical advancement, promotion, and understanding of a broad range of utility and industrialscale heat exchange and vacuum apparatus.
Standards for jet ejectors, standards for field testing, and construction standards for steam jet ejector components. Standards for steam jet vacuum systems pdf document. Graham corporation brings more than 70 years of proven experience to the application, design, and operation of ejector systems. Our steam jet vacuum systems products jetvac technologies. Addendum 1 to standards for steam jet vacuum systems, 7th edition. As the steam flows through this nozzle, its velocity greatly increases.
Hei standards for steam jet vacuum systems pdf files kdgdivs. Page 4 steam cleaning hard floors towards the floor. The 11th edition has incorporated several revisions since the 10th edition, including new sample calculations for oxygen content and tubeside pressure drop, a new section 4. Four, five, and sixstage units can also be noncondensing. Standards and typical specifications for tray type deaerators, 10th edition hei 120 currently viewing. Hei standards for steam jet vacuum systems 5th download as pdf file. Hoover ssn1700 steamjet instruction manual pdf download. Steam jet vacuum ejectors remove gases andor vapours from process operations thereby generating a vacuum in the reactor. Power generation condensing steam turbines air ejection. Chemical processing applications that require vacuum systems. Temperature confuser and diffuser ejector third stage. Jet vacuum plants for the chemical industry jet vacuum pumps for steel degassing in the manufacture of high quality steel, the raw steel is treated under vacuum.
Some of these involve distillation,filtration, drying, degassing,deodourizing, deaeration, crystallization and many others. Our ejectors are used in large variety of applications. Standards for steam jet vacuum systems, 7th edition hei. Multistage, steam jet vacuum systems, surface condenser. Vacuum generation is a crucial facet during the distillation process. Vacuum products steam jet ejectors by graham corporation. Vacuum system air leakage calculation question industrial. The suitability of vacuum pump or steam jet air ejector systems for a given application depends on the availability of motive steam during startup, the costs associated with the usage of steam or electricity and the preferences of the end user. Hei standards for steam jet vacuum systems 5th pdf document. Combining low capital cost, simple operation, high reliability and the ability to handle large volumes at very high vacuum levels, they can be optimized to. In this example two jet ejector stages are connected in series to achieve a suction pressure of 1 mbar with a minimum of motive medium. Standards for direct contact barometric and low level. Nov 12, 2010 standards for steam jet vacuum systems.
The convergingdiverging steam jet is rather like a twostage compressor, but with no moving parts. The heat exchange institute hei standards for steam surface condensers are used to design and predict the performance of condensers for power plant applications. Hei standards discount bundle 1 amendments, rulings, supplements, and errata. Hei standards for steam jet vacuum systems 5th mole. Steam jet vacuum systems jetvac technologies integrated engineering and manufacturing guarantees that quality is designed and built into every jetvac component and system. Standards for gasketed plate heat exchangers, 1st edition hei 126 standards for steam jet vacuum systems, 7th edition hei 125 standards and typical specifications for tray type deaerators, 10th edition hei 120 standards for air cooled condensers, 2nd edition hei 121, hei 30872017 performance standards for liquid.
A simplified drawing of such a steam jet is shown in fig. February 2016 standards for air cooled condensers, 2nd edition hei 121. The new standard now integrates the previous three separate standards on steam jet ejectors. Steam jet vacuum systems multistage steam jet ejectors. Check stamped pressure on nameplate or on nozzle with an accurate steam gauge installed in steam chest with gauge syphon. The seventh edition of this standard has been developed by the vacuum technology section of the heat exchange institute, inc. Steam jet ejectors educt process gases into the steam chest and then through a specially understand realworld problems of vacuum ejector performance use these guidelines and case histories to evaluate and troubleshoot ejector systems condensables vacuum column overhead. In general, the diameter of the piping between the process and the ejector system must be at least as large as the suction connection in the firststage ejector. H k industries is a leading manufacturer of multistage steam ejector systems in the country. Dec 28, 2019 standards for gasketed plate heat exchangers, 1st edition hei 126 standards for steam jet vacuum systems, 7th edition hei 125 standards and typical specifications for tray type deaerators, 10th edition hei 120 standards for air cooled condensers, 2nd edition hei 121, hei 30872017 performance standards for liquid.
The acc is treated as static volume losing its vacuum through leakages which allow influx of ambient air into the system. Our experience spans a wide range of applications and markets, including systems for space simulation, high vacuum applications in metals vacuum degassing, applications involving vaporliquid and chemical equilibrium for fertilizer plants. Multistage steam jet vacuum systems steam jet chilling plants ice condensation vacuum systems steam jet heaters tank mixing systems. The suction flow is compressed to a higher pressure. Vacuum drop test of aircooled condensers in operation. Standards for shell and tube heat exchangers, 5th edition hei 129 standards for steam surface condensers, 12th edition hei 118 standards for gasketed plate heat exchangers, 1st edition hei 126 standards for steam jet vacuum systems, 7th edition hei 125 standards and typical specifications for tray type deaerators, 10th edition. Hei standards for steam jet vacuum systems 5th pdf. Standards for steam jet vacuum systems, 7th edition hei 125. Understand realworld problems of vacuum ejector performance. Hei 2866 standards for steam jet vacuum systems active details.
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