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### Samsung Galaxy S III User Guide - i-wireless

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### The Centrifugal Pump (pdf) - Grundfos

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### centrifugal pump selection, sizing, and interpretation of performance

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Pumps may be classified in two general types, dynamic and positive displacement. Positive displacement pumps are those in which energy is imparted to the liquid in a fixed displacement volume, such as a casing or a cylinder, by the rotary motion of gears, screws, or vanes, or by reciprocating pistons or plungers. Centrifugal pumps are dynamic pumps. Energy is imparted to the liquid by means of a disk with curved vanes rotating on a shaft called the impeller. The impeller imparts kinetic energy to the fluid by means of its shape and high rotational velocity. This energy is transformed to pressure energy when the fluid reaches the pump casing (see Figure 1-12). The pressure head difference between the inlet and the outlet, or Total Head produced by the pump, is proportional to the impeller speed and diameter. Therefore, to obtain a higher head, the rotational speed or the impeller diameter can be increased. To learn more about how a centrifugal pump increases a fluid's pressure, see reference 15. How a pump produces pressure is beyond the scope of this book, but an interesting experiment you can try at home will illustrate a similar process. A small plastic bottle is required to which a string is attached. Twist a rubber band around the bottle’s neck a few times and attach two 3-foot long strings, one on each side of the glass. Tie the other ends of the string together, fill the glass half full with water and hold it suspended from the strings. Start spinning. As you may have guessed, the fluid inside the glass will become pressurized. How do you know that the fluid is pressurized? To prove it to yourself, make a very small hole in the glass bottom. Make the hole just large enough for water to dribble through. Now spin the glass again. The water will spray out of the glass bottom no matter what its position, up or down. ...

### Centrifugal pump - Saylor.org

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Centrifugal pump A centrifugal pump is a rotodynamic pump that uses a rotating impeller to increase the pressure of a fluid. Centrifugal pumps are commonly used to move liquids through a piping system. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits into the downstream piping system. Centrifugal pumps are used for large discharge through smaller heads. History Warman centrifugal pump in a Coal Handling and Preparation Plant (CHPP) application According to Reti, the Brazilian soldier and historian of science, the first machine that could be characterized as a centrifugal pump was a mud lifting machine which appeared as early as 1475 in a treatise by the Italian Renaissance engineer Francesco di Giorgio Martini.[1] True centrifugal pumps were not developed until the late 17th century, when Denis Papin made one with straight vanes. The curved vane was introduced by British inventor John Appold in 1851. How it works Like most pumps, a centrifugal pumps converts mechanical energy from a motor to energy of a moving fluid; some of the energy goes into kinetic energy of fluid motion, and some into potential energy, represented by a fluid pressure or by lifting the fluid against gravity to a higher level. The transfer of energy from the mechanical rotation of the impeller to the motion and pressure of the fluid is usually described in terms of centrifugal force, especially in older sources written before the modern concept of centrifugal force as a fictitious force in a rotating reference frame was well articulated. The concept of centrifugal force is not actually required to describe the action of the centrifugal pump. In the modern centrifugal pump, most of the energy conversion is due Cutaway view of centrifugal pump to the outward force that curved impeller blades impart on the fluid. Invariably, some of the energy also pushes the fluid into a circular motion, and this circular motion can also convey some energy and increase the pressure at the outlet. The relationship between these mechanisms was described, with the typical mixed conception of centrifugal force as known as that time, in an 1859 article on centrifugal pumps, thus:[2] Centrifugal pump To arrive by a simpler method than that just given at a general idea of the mode of action of the exterior whirlpool in improving the efficiency of the centrifugal pump, it is only necessary to consider that the mass of water revolving in the whirlpool chamber, round the circumference of the wheel, must necessarily exert a centrifugal force, and that this centrifugal force may readily be supposed to add itself to the outward force generated within the wheel; or, in other words, to go to increase the pumping power of the wheel. The outward force generated within the wheel is to be understood as being produced entirely by the medium of centrifugal force if the vanes of the wheel be straight and radial; but if they be curved, as is more commonly A centrifugal pump uses a spinning "impeller," the case, the outward force is partly produced through the which normally has backward-swept blades that medium of centrifugal force, and partly applied by the vanes to directly push water outward. the water as a radial component of the oblique pressure, which, in consequence of their obliquity to the radius, they apply to the water as it moves outwards along them. On this subject it is well to observe that while the quantity of water...

### Manual, 564 Electric - Fireplace Xtrordinair

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1. Prior to the first use of the fireplace verify the following: · Are the circuit breakers for the unit on? · Are the light bulbs in your fireplace loose? (to check, follow the instructions for replacing the light bulbs in the maintenance section of this manual) 2. The heater on your fireplace may emit a slight, harmless odor when first used. This odor is a normal condition caused by the initial heating of internal heater parts and will not occur again. 3. The information regarding the model of your fireplace can be found on the rating plate located on the back of the unit. 4. If you have any technical questions or concerns regarding the operation of your fireplace, or require service contact your Travis Industries, Inc. dealer before returning the product to the point of purchase. You can find a Travis dealer at www.travisproducts.com 3 IMPORTANT INSTRUCTIONS PLEASE RETAIN THIS USER’S GUIDE FOR FUTURE REFERENCE When using electrical appliances, basic precautions should always be followed to reduce the risk of fire, electric shock, and injury to persons, including the following: 1. Read all instructions before using the Fireplace. 2. The heater is hot when in use. To avoid burns, do not let bare skin touch hot surfaces. The trim around the heater outlet becomes hot during heater operation. Keep combustible materials, such as furniture, pillows, bedding, papers, clothes, and curtains at least 3 feet (0.9m) from the front of the unit. CAUTION: High Temperature. Keep electrical cords, drapery, and other furnishings at least 3FT (.9m) from the front of the heater and away from the side and rear. 3. Extreme caution is necessary when any heater is used by or near children or invalids and whenever the unit is left operating and unattended. 4. Always unplug the fireplace when not in use. 5. Do not operate any unit with a damaged cord or plug, or if the heater has malfunctioned, or if the fireplace has been dropped or damaged in any manner. Return heater to authorized service facility for examination, electrical or mechanical adjustment, or repair. 6. Do not use outdoors. 7. The fireplace is not intended for use in bathrooms, laundry areas and similar indoor locations. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN NO USER-SERVICEABLE PARTS INSIDE...

### PRACTICAL USER'S GUIDE FOR THE DIMPLEX ELECTRIC ...

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Valued Customer, We are pleased that you have chosen to purchase an electric fireplace manufactured by Dimplex North America Ltd. Over the years, valuable memories will occur around the warmth and comfort of your hearth. Thank you for allowing our product to be the backdrop for those special moments. 7204820200REV03 QUICK REFERENCE GUIDE FOR THE DIMPLEX ELECTRIC FIREPLACE 1. Before using the electric corner wall mounted fireplace verify: • Are the circuit breakers for the unit on? • Are the light bulbs loose? (to check, follow the instructions for replacing the light bulbs under the maintenance section of this manual) 2. The heater may emit a slight, harmless odor when first used. This odor is a normal condition caused by the initial heating of internal heater parts. 3. The information regarding the model of your unit can be found on the rating plate located inside the unit on the top left hand corner above the mirror. 4. If you have any questions or concerns regarding the operation of your fireplace, contact Dimplex customer service at 1-888-DIMPLEX (1-888346-7539).

### Electric Fireplaces - Outdoor GreatRoom Co.

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### Aspire 5715Z/5315 Series - ftp

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### Acer Aspire 5315 - of /Manual User Guide on PDF

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