Manufacturing operational features

Several manufacturers make explosimeters or combustible gas indicators. Although they differ somewhat in design and operating features, their operation is based on the fact that a measurable amount of heat is released when a combustible gas or vapor is burned. Most meters contain a battery-operated electrical circuit known as a Wheatstone bridge, which is balanced by means of controls on the outside of the instrument. 

The manufacturer of structures that satisfy API Standard 4F must also furnish the purchaser with one set of instructions that covers operational features, block reeving diagram, and lubrication points for each drilling or well servicing structure. Instructions should include the raising and lowering of the mast and a facsimile of the API nameplate. 

A feature of polymer solutions which is commonly observed in many polymer manufacturing operations is illustrated in Figure 2. At a given pressure, a two-phase region exists below a concave-downward locus of temperature-composition points. One of the two... 

The bulk of the SFE experiments performed to date were executed with systems typically consisting of a syringe or reciprocating pump, a high-pressure containing sample vessel comprised of HPLC column hardware, and a fused silica capillary restrictor. Extraction vessel temperatures of 40-80°C were usually accomplished using a converted oven or with the use of a thermostatted tube heater (2,3). Instrument manufacturers now offer a variety of commercially available SFE systems that vary in design, operation, features, ease of operation, and limitations. 

Reference methods for blood gas and electrolyte determinations have been described in detail by the IFCC. A schematic diagram characteristic of a typical instrument is shown in Figure 27-4. Electrochemical principles and structural features of electrodes are discussed in Chapter 4. Prominent manufacturers of blood gas equipment include Roche Scientific Corp., Bayer Diagnostics, Instrumentation Laboratory, Nova Biomedical, and Radiometer America, Inc. Readers are referred to these manufacturers for details and operational features of specific instruments. 

Once the production resources have been selected, it is necessary to select the appropriate values for controllable parameters in manufacturing operations, hi product manufacturing scenarios, parameters such as cutting speed, feed, and depth of cut or width of cut need to be selected for each feature. In provision of services, parameters are more context sensitive. For example, in providing a helpdesk to technically support a software system, the number of persormel is a parameter that needs to be chosen. Various models are used for selection of operational parameters including the minimum cost models that seek to minimize the overall resource cost of the operation, maximum production rate models that aim to realize the highest possible throughput and lead time- oriented models that strive to lower the production s time to market. 

The characteristic feature of contract manufacturing companies is that by handling their own manufacturing operations they acquire significant supply chain management expertise and are able to offer this expertise as a service to other companies. 

As the first commercially available rechargeable lithium power source system, the Li/MoSj-type batteiy (MOLICEL ) is manufactured by Moli Eneigy Ltd. in Canada. This cell delivers performance and operating features far superior to conventional secondary batteries (Figure 11.9). This battery uses a hthium anode, a PC-based electrolyte solution, and a processed MoSj cathode. The discharge reaction is... 

Metal-bodied kettles are the result of many manufacturing operations, and the advantage of a plastic is that it can be moulded in one piece to provide features to which to attach the electrical element and socket, and provide a colourful finish, at a cost considerably less than that of the metal part. Obviously the main requirement is to withstand boiling water on average a kettle is boiled for three-minute periods ten times every day. Furthermore, it should be resistant to attack by fats, oils and other kitchen chemicals, have good dimensional stability, and resistance to thermal cycling and to stress cracking. 

Though a fair amount of works by the operations research community has been done to address supply chain operation problems with international and domestic regulatory factors, most of these works do not account for operational features (e.g. multi-product manufacturing processes) that are unique to chemical companies. In addition, many of these works incorporate regulatory factors which are not accounted for in other works or vice versa. There is still lack of global supply chain operation models which comprehensively cover all the regulatory factors that have direct or indirect effect to any firm s bottom line. As far as research opportunities in supply chain operation problems of chemical industry are concerned, there is still abundance of them for researchers from both the operations research and chemical engineering communities to seize. 

Features High efficiency general purpose gel type gives consistency in prod, volume, whip times, and batter sp.gr for use in plant bakeries and larger manufacturing operations... 

The changes described above also allowed much easier access to the high voltage cable for routine (6-month) owner directed, service operations, and provided better upper and lower x-ray cabinet and control cabinet ventilation. With the exception of the x-ray tubes, all the individual manufactured components, on all four systems are identical. There are very subtle differences in the warm-up/start-up sequence on the x-ray controllers on the newer systems due to model/year and x-ray tube differences. The last three systems were supplied with environmental type key-boards for the image processors and base-mounted , rather than conduit-mounted exterior warning indicators. The first system was subsequently upgraded to include the better keyboard and the external warning appliances/features. 

In summary, the bad features of partial combustion processes are the cost of oxygen and the dilution of the cracked gases with combustion products. Flame stability is always a potential problem. These features are more than offset by the inherent simplicity of the operation, which is the reason that partial combustion is the predominant process for manufacturing acetylene from hydrocarbons. 

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