Show STRAUB ALL STEEL transportable sectionalized WATER TUBE BOILER this boiler has been designed to fill a definite want or need forced upon us when we were called upon to furnish power plants to operate our sectionalized mining machinery reports the engineering department of the straub manufacturing fac turing tu ring company many very rich and valuable properties have not been working due to td the fact that it has been impossible to transport to them the heavy ordinary type of boiler and a really satisfactory sectionalized boiler has not been available until the advent of this boiler the straub water tube boiler is very simple and consists of one or more units depending upon the horsepower to be developed the accompanying cut shows a 30 horsepower boiler of two units of 15 horsepower each the horsepower fill 4 tug X being very conservatively rated by allowing at least 10 square feet of heating surface to one horsepower each unit consists of two circular flanged steel heads each fitted with a readily removable dished steel cover plate fitted with a special gasket and joint these two heads are interconnected by a suitable number of perfectly straight water tubes expanded into the circular heads which thus form the tube sheets the entire assembly is set at a suitable inclination with the front end suspended to allow of easy expansion and contraction without straining the firebox is underneath the front and higher end thus causing a very rapid circulation of water between the two heads via the tubes the steam is discharged from the front head into a longitudinal steam drum not visible in the photograph but which extends from end to end of the boiler and is completely enclosed in the hot gases inside the boiler casing A cross drum is usually fitted on top of the boiler into which the steam discharges from the longitudinal drums thus furnishing additional steam reserve and insuring dry steam even when the boiler is forced to its maximum capacity the entire boiler is fitted with a sheet steel casing lined with firebrick and refractory frac tory materials thus making a self contained and very efficient steam generator the essential p points eints of a first class boiler are portability ease edse of erection safety economy of operation ability and adap adaptability to different kinds of fuel and lastly bul bin not least is the matter of cost which must be moderate te taking up these various essentials in the above order it may be stated that the straub water tube boiler is a really sectionalized boiler as the heaviest piece does not exceed lbs ibs and are of such a size that they are readily transported by mule back the entire structure with the exception of the firebrick lining and iron furnace fittings being of wrought steel are absolutely unbreakable and arrive at the end of the trail in perfect condition the ease with which these boilers are erected is remarkable and is mainly due to their simple design and also to the fact that they have been properly assembled marked and dismantled before shipment from the factory |