Worthington Pump Handbook: Design, Construction and Application of All Commercial Types of Pumps

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Worthington Pump and Machinery Corporation, 1927 - Centrifugal pumps - 552 pages

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Page 3 - At the bottom of the oil tube is a small outlet tube through which the oil to be tested flows into a receiving flask.
Page 15 - An indicator diagram is the result of two motions, namely : a horizontal movement of the paper in exact correspondence with the movement of the piston, and a vertical movement of the pencil in exact ratio to the pressure exerted in the cylinder of the engine. Consequently, it represents by its length, the stroke of the engine on a reduced scale, and by its height at any point, the pressure on the piston, at a corresponding point in the stroke. The shape of the diagram depends altogether upon the...
Page 16 - EFFECTIVE REACH OF FIRE STREAMS Showing the Distance in Feet from the Nozzle at which Streams will do Effective Work with a Moderate Wind Blowing. With a Strong Wind the Reach is Greatly Reduced. NOTE. — Nozzle pressures are as indicated by Pilot tube.
Page 3 - Stir the liquid in the bath during the run and carefully maintain it at the previously determined proper temperature. Stop the watch when the bottom of the meniscus of the oil reaches the mark on the neck of the receiving flask. The time in seconds for the delivery of 60 cc. of oil is the Saybolt viscosity of the oil at the temperature 'at which the test was made.
Page 5 - CALORIE is the amount of heat required to raise the temperature of one kilogram of water one degree centigrade.
Page 12 - The efficiency of the motor, and its rise of temperature under full -load, will be approximately unchanged, and the maximum power output will be slightly increased. An induction motor having a squirrel-cage rotor will develop sufficient torque to start satisfactorily with from 40 per cent to 60 per cent of the rated voltage applied to the primary member. Therefore, the current required at starting may be greatly reduced by supplying the primary member, at starting, with current through a step-down...
Page 17 - The watt = 10 r absolute units of power (or 10,000,000 ergs per second), and is the power of a current of one ampere flowing under a pressure of one volt. This unit of power is equal to one joule per second, and is approximately y^g of one horse-power, or one horse-power is equal to 746 watts.
Page 7 - The boiling point of a liquid may be defined as the temperature at which its vapor pressure is equal to the pressure of the surrounding atmosphere [4].
Page 7 - The Heat of Fusion of a substance is the number of thermal units required to change a unit mass of the solid at its melting point into liquid at the same temperature.

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