. American engineer and railroad journal . ttom with a holeconsiderably larger than the inlet to the valve. The entranceedge of this hole was rounded with a curve of one inch the other side of this blank flange, and enclosing the safetyvalve, was a 10 in. flanged tee. The outlet of the tee led to the 364 AMERICAN ENGINEER AND RAILROAD JOURNAL. SeITEMBEK, IJll. condenser. The end of the tee on the straight run was coveredwith a blank flange. Between runs this blank flange on the endof the tee was removed, and the setting of the valve each run the valve was examined to se
. American engineer and railroad journal . ttom with a holeconsiderably larger than the inlet to the valve. The entranceedge of this hole was rounded with a curve of one inch the other side of this blank flange, and enclosing the safetyvalve, was a 10 in. flanged tee. The outlet of the tee led to the 364 AMERICAN ENGINEER AND RAILROAD JOURNAL. SeITEMBEK, IJll. condenser. The end of the tee on the straight run was coveredwith a blank flange. Between runs this blank flange on the endof the tee was removed, and the setting of the valve each run the valve was examined to see if it had movedfrom its previous setting. The steam passing through the valve was condensed in a sur-face condenser which was tested immediately before and imme-diately after each test for tightness. The condenser was foundto be absolutely tight. In every case the outer muffler casingwas screwed down to its lowest position. The steam was ledfrom the boiler through a small separator in the boiler room, unDREDTnS OF an inchONCIBCUMFERENCf. FOR TEST. then through a second separator located about 20 ft. from thesafety valve. A calorimeter was attached to the 10 in. pipeabout 8 ft. from the safety valve, and the quality of the steamdetermined. In all of the tests the steam was practically see whether or not there was any pressure in the muffler,a copper pipe was connected and led outside of the 10 in. tee,and a low pressure gage attached. In no case was there anypressure shown by this gage. The boiler gage used was a Crosby standard test gage at-tached to the 10 in. pipe. In nearly all of the tests the gagewas read at one minute intervals. The pressures given in thetables are the average of five readings. The pressure comingon the valve tends to make the opening through the valve greaterthan the lift as set, due to the yielding of the metal. To deter-mine this yielding, the valves were placed in a small Riehlctesting machine, and a load equal to the steam
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
