Pumps classes Lined

Turbine type performance, 178 Vertical in-line, 165, 175 Vertical multistage, 168 Vertical propeller, 169 Viscosity correction, 203-207 Pumps classes, 161... 

A Class 5 installation follows the Class 4 concept, but is characterized by having pumps operating with identical spares and have one or more pumps operating in plant bays where product storage gives time to assess the problem and to take action to get the pump back on-line. 

In order for an organelle lumen or an extracellular space (e.g., the lumen of the stomach) to become acidic, movement of protons must be accompanied either by (1) movement of an equal number of anions (e.g.. Cl ) in the same direction or by (2) movement of equal numbers of a different cation in the opposite direction. The first process occurs in lysosomes and plant vacuoles whose membranes contain V-class H ATPases and anion channels through which accompanying Cl ions move (Figure 7-10b). The second process occurs in the lining of the stomach, which contains a P-class H /K ATPase that is not electrogenic and pumps one H outward and one inward. Operation of this pump is discussed later in the chapter. 

A FIGURE 7-28 Acidification of the stomach lumen by parietal cells in the gastric lining. The apical membrane of parietal cells contains an H /K" ATPase (a P-class pump) as well as Cr and channel proteins. Note the cyclic transport across the apical membrane ions are pumped inward by the... 

Technical service groups in this field also use engineers. These men are frequently sent into the customers plants by a raw material supplier to assist in the design and/or installation of tankage, pipe lines, valves, pumps, and the like, thus implementing the suggestions in the safety manual. Classes are frequently held for the customer s personnel, so that they may learn firsthand how to handle these chemicals. 

In KCl, the N2 band overlaps the 1.06-/xm line of the Nd YAG laser, which forms a convenierrt pump for the center. The emission, shown in Fig. 11, sparts from 1.1-1.5 /xm. Lasing in a pulsed mode has been obtained from this center over the 1.23-1.35-)txm range. The laser only operates in a pulsed mode however. The pirlsed operation is probably (but not yet conclusively) due to multiplet formation of the electrons in the excited state. Urrlike all the other lasers described in this article, the N-cerrter has more than one electron, which leads to possible triplet or multiplet formation upon relaxation. Such mrrltiplet formation could lead to deleterious absorptions in the lasing region, and to a general depletion of laser-active centers. Nonetheless, the N-center laser represents the first of a new class of aggregate center lasers that may open the door to new systems and applications in the future. 

The T5 LI (Low Inductance) miniature diaphragm pump from Parker Hannifin provides a low inductance solution to a variety of applications. The T5 product line offers best-in-class performance in a miniature 13mm wide and 14-gram package. The portable pump flows efficiently at 100-250 cc/minute. Parker Hannifin, www.parker.com. Circle 265... 

Two medium-voltage buses supplied from the secondary windings of the two transformers on the Class IV primary medium-voltage buses, which supply power to the pumps in the service water system, ECCS, moderator circulation system, shutdown cooling system, HTS feed lines, steam generator auxiliary feed line, and the air compressors and chillers. 

---