Revolution per minute

Radian per second squared revolution per minute squared 572.958... 

Revolution per minute squared radian per second squared 0.001 745 33... 

As can be seen, for constant cake thickness doubling the feed concentration doubles the yield. So-called high duty vacuum dmm filters use a unique cake discharge method to allow very thin cakes to be discharged and can therefore be operated at very high speeds up to 25 revolutions per minute. 

NOTE To convert inches to milhmeters, multiply by 25.4 to convert revolutions per minute to radians per second, multiply by 0.105 to convert gallons per minute to hters per second, multiply by 0.063 to convert tons per hour to kilograms per second, multiply by 0.253 and to convert horsepower to kilowatts, multiply by 0.746. 

NOTE To convert inches to millimeters, multiply hy 25.4 to convert revolutions per minute to radi-... 

Involved in producing the curves for Figs. 29-53 and 29-55 is a calculation of the so-called balance point at which the flow and revolutions per minute required by the recovery unit match those provided by the pump. If the recovery turbine is the sole driver (as for the lean pump of Fig. 29-54), both the speed and the brake horsepower of the recoveiy turbine and its driven pump must be the same at the so-called balance point. If there is a makeup driver and the recovery unit has available to it just the flow from the pump that it is driving, as for the pump of Fig. 29-56, then the speea ana capacity must match at the balance point. 

When a pump s velocity changes, measured in revolutions per minute (rpm), the operational characteristics aLso change. These changes can be calculated using the Affinity Laws. Before continuing, let s define some-terms we ll be using ... 

Speed = Veloeity = N Shaft speed measured in revolutions per minute (rpm). 

Wliere N = the speed of the pump/motor in revolutions per minute Q = the square root of the flow in gallons per minute at the Best Efficiency Point BEP. For double suction pumps, use A BEP Flow. NPSHr = the net positive suction head required by the pump at the BFiP. 

Another distinction in impellers is the way the liquid traverses and leaves the impeller blades. This is called the Specific Speed, Ns. It is another index used by pump designers to describe the geometry of the impeller and to classify impellers according to their clesign type and application. By definition, the Specific Speed, Ns is the revolutions per minute (rpm) at which a geometrically similar impeller would run if it were of such a size as to discharge one gallon per minute at one foot of head. 

For Main Air Blower Serviee, rated speed (in revolutions per minute) is the speed at whieh the expander operates without... 

U/Min., abbrev. (Umdrehungen in der Minute) revolutions per minute, r.p.m. u.Mk., abbrev. (unter dem Mikroskop) under the miscroscope. 

After two days of culturing at 25°C under stirring (220 revolutions per minute) and ventilating (1.65 m /hr), 18 liters of the obtained culture are removed under sterile conditions and introduced into a fermenter of the same size charged with 28.2 liters of a nutrient solution containing ... 

Each interferon preparation was ultracentrifuged at 20,000 revolutions per minute for one hour to remove tissue debris and inactivated virus. The supernatant was dialyzed against distilled water (1 400) for 24 hours at4°C. The material was then freeze-dried. The dried product was reconstituted in one-tenth of the original volume in distilled water and dispensed into ampoules. Reconstituted solutions were assayed for interferon activity, examined for toxicity, and tested for sterility. 

Compact, high-rim-speed, stand-alone flywheel systems may require that the bearings run continuously for years at many tens of thousands of revolutions per minute. Smaller rotors will operate at higher rotation rates. 

Rotative speed, revolutions per minute = RPM = rpm P = Positive external pressure on surface of liquid ( + ) or partial vacuum on surface of liquid ( —)... 

Np = power number D = tank diameter d = impeller diameter Z = height of liquid in tank n = revolutions per minute Tm = time... 

Rpm = revolutions per minute of crank shaft or number of compression strokes per minute... 

Specific speed is defined as the speed in revolutions per minute at which an impeller would rotate if reduced proportionately in size so as to deliver 1 ft of gas per minute against a total head of 1 ft of fluid. ... 

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