Pumps/pumping pump range chart

Figure 32.65 Pump range chart (courtesy Nederlandse Aardolie MU BV)...

Typical Pump Head Capacity Range Charts... 

FIG. 10-26 Pump coverage chart based on normal ranges of operation of commercially available types. Solid lines use left ordinate, bead scale. Broken lines use right ordinate, pressure scale. To conveii gallons per minute to cubic meters per hour, multiply by 0.2271 to conveii feet to meters, multiply by 0.3048 and to conveii poiinds-force per square inch to Idlopascals, multiply by 6.895. 

FIGURE 1.4 Pump selection chart for AJAX E range pumps. (Reproduced with permission.)... 

FIGURE 8-5 Tomb chart for pumps showing size of pump versus flow range and head. 

Range of Operation Because of the wide variety of pump types and the number of factors which determine the selection of any one type for a specific installation, the designer must first eliminate all but those types of reasonable possibility. Since range of operation is always an important consideration. Fig. 10-26 should be of assistance. The boundaries shown for each pump type are at best approximate, as unusual applications for which the best selection contradicts the chart... 

Operating chart, 385 Operating range, 386 Performance curve, 386 Rotary displacement pump, 397 Rotary lobe blowers, 390, 392, 394 Rotary lobe performance curves,... 

The three-compartment source was attached to the analyzer tube of a 6-inch radius 60° sector magnetic deflection mass spectrometer. Differential pumping was used between the source and analyzer regions. The ion detector was a 14-stage electron multiplier coupled to both a vibrat-ing-reed electrometer and a pulse counter (38). The electrometer was connected to a strip-chart recorder and the counter to a printer. This arrangement allowed any range of e/m to be scanned or a given peak to be monitored. 

Set the detector at 620 nm. The injected sample should provide a peak maximum of about 0.15 absorbance unit with a 1-cm path flow cell. Adjust your recording device (strip chart recorder or computer— use a chart speed of 0.5 cm/s if a recorder) to accommodate this range. With the carrier being pumped, turn the injection valve to the inject position. Note the blue sample... 

Figure 6.13 is a convenience chart made up from Fig. 6.10. It is well suited to the needs of an oil company, which spends large sums of money in pumping fluids with a wide range of viscosities but it is poorly suited to the needs of a city water supply company, which deals almost exclusively with water. When Fig. 6.13 was made from Fig. 6.10, the pipe diameter and roughness were held constant. If we are dealing with water, we can assume that the temperature is constant (which is approximately true in city water systems) and that the absolute roughness of the pipe wall is constant. Then the pressure drop as a function of pipe diameter and flow rate can be tabulated for all flows of water at the chosen temperature. Appendix A.4 is such a table, made up for the flow of water I at 60°F through schedule 40 pipe (the most common size in U.S. industrial practice).

Delivery Pump. A constant-delivery pump permits the time axis of a strip-chart recorder to be used as the volume-of-titrant axis (with a simple conversion factor). Typically, a syringe driven by a synchronous motor (that drives a carriage or screw) is used, and solutions can be delivered at constant rates ranging down to a few microliters per minute. Because of their variable flow rates, the more common peristaltic pumps are not often used for thermometric titrations. 

Figure 15.8 shows a tunnel dryer for heat-sensitive products fitted with a heat pump and the corresponding processes on a Mollier chart. Drying temperatures are typically in the range from 0°C to 70°C. However, for special purposes the lower temperature limit can be shifted down to -10°C. Inlet relative air humidities are usually kept around 30% to 40% (Magnussen and Strpmmen, 1981 Strpmmen, 1980). 

A generally applicable system for SE-HPLC of proteins consists of one pump that can deliver the eluant mixtures at accurate flow-rates of 0.1 — 1.0 ml/min an injection valve for application of sample volumes up to 200 /d an optical flow-through cell compatible with a UV-detector with at least 280 nm detection, or if higher sensitivity is required, detectirai at 210—220 nm a chart-recorder and one or two columns that cover the desired molecular weight range and that are compatible with the selected mobile phase. The system is generally operated at room temperature. 

The evaluation of is not so straight forward. The Chart does not cover the liquid range so that we can follow a straight line - assuming a reversible and adiabatic pump - until we hit the pressure at 35 bar. Instead we calculate the pump duty using the expression developed in Example 3.11 ... 

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