. Railway mechanical engineer . Details of Rigby Liquid Fuel Regulating Valve provides a guarantee against waste of fuel. The installationof the valve from a safety point of view is highly important,as explosions due to leakage are almost an impossibility. Itis stated that savings of five to 15 per cent are possible byusing the Rigby regulating valve. The valve is manufacturedin sizes suitable for various conditions, with two standardsizes; namely: type A with 1-in. valve travel; and tvpeB with y2-in. travel. March, 1921 RAILWAY MKCHANICAL ENG1NKKK 195 Duplex Mono Flue Gas Analyzer ANEW type o
. Railway mechanical engineer . Details of Rigby Liquid Fuel Regulating Valve provides a guarantee against waste of fuel. The installationof the valve from a safety point of view is highly important,as explosions due to leakage are almost an impossibility. Itis stated that savings of five to 15 per cent are possible byusing the Rigby regulating valve. The valve is manufacturedin sizes suitable for various conditions, with two standardsizes; namely: type A with 1-in. valve travel; and tvpeB with y2-in. travel. March, 1921 RAILWAY MKCHANICAL ENG1NKKK 195 Duplex Mono Flue Gas Analyzer ANEW type of instrument designed to make automaticanalyses of flue gases and to record both CO, andcombustible gases has been developed by the of America, Buffalo, V Y. The instrument,which is known as the Duplex Mono Gas Analyzer, is intended to give a more reliable indication of the efficienq oicombustion than can be obtained by the use of an instrumi m. Automatic Analyzer for Recording CO:. and Combustible Gases recording C02 alone. To show the necessity for greater re-finement in flue gas analysis, it is pointed out that an in-crease of one per cent in the combustible gases may decreasethe efficiency of combustion over six per cent. The per-centage of CO., at which combustible gases begin to form,varies considerably from time to time, even in the samefurnace. Occasional tests with hand instruments to deter-mine the presence of CO do not give sufficient data to insureproper combustion conditions, and effective combustion con-trol can be established only by continuouslyrecording the percentage of C02 as an indicatorof the amount of excess air present and alsodetecting and recording the presence of com-bustible gases, either CO, CH4 or H2. The Duplex Mono is designed to detect thepresence of combustible gases in the flues im-mediately upon their appearance and to recordaccurately the percentage of C02 at that par-ticular time. The char
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
