A consistent polymerization vessel vacuum of 0.3 mm Hg is needed, but the existing vacuum source, a five-stage steam jet ejector, could only provide a 0.5 mm Hg level. The process for making polyester requires an extremely low vacuum on the polymerization reactor. Nylon-6 molding and extrusion resins are also produced at the plant in Hopewell, Virginia. = ,įirestone Fibers and Textiles Company, a division of Firestone Tire and Rubber Company, manufactures tire and industrial yarns of polyester and nylon-6. The 12 appendixes cover: physical properties of common fluids handy vacuum engineering data and rules of thumb SI unit conversions sizing air and steam metering orifices for testing drill sizes ejector operating costs and design optimization forms for ejector calculations, tests, and inspections instructions for preparing ejector specifications test kit contents list ejector manufacturers and suppliers of referenced hardware and information and failure modes and symptoms. Upgrading of existing ejector procedures and hardware is reviewed in Chapter 12. Chapter 11 reviews steam-jet refrigeration, steam-jet and gas-jet compressors, liquid jet eductors, desuperheaters, special design situations, and designing one's own more » systems. Part 4 on other ejector applications and upgrading ejector usage also consists of two chapters. Part 3, consisting of two chapters, is devoted to specifying and purchasing steam jet ejectors. The final chapter of Part 2 (Chapters 3-8) thoroughly covers all aspects of operation, testing, troubleshooting and maintenance. Chapter 7 is an excellent review of installation of ejector vacuum systems. The various types of pressure control are discussed in Chapter 6. In Chapter 5, contact and surface condensers are reviewed, and calculation procedures are presented.

Engineering calculations for ejector stages is thoroughly discussed in Chapter 4. How ejector stages work is reviewed in Chapter 3. Chapter 2 discusses what an ejector is and how it works. Chapter 1 is a short overview on how to use the text. There are still many applications, however, such as those with large capacity requirements, where ejectors are the only equipment that can produce sufficient vacuum.

With increasing emphasis on stricter pollution control, their use was curtailed. Steam jet ejectors were for many years the workhorse of the chemical process industries for producing vacuum.

Ejector design calculation software