. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students. CONNECT WITH LOW PRESSURE SIDE Fig. 39. Reducing Valve. Fig. 40. Back-Pressure Valve. when air collects in the top of the radiator and lowers the waterlevel. Pressure Reducing Valves.—It is often necessary to providesteam at different pressures in the same building, as in a com-bined power and heating plant. In this case the reduction inpressure is accomplished by passing the steam through a reduc-ing valve. There are many different forms of these valves, allacting more or less up
. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students. CONNECT WITH LOW PRESSURE SIDE Fig. 39. Reducing Valve. Fig. 40. Back-Pressure Valve. when air collects in the top of the radiator and lowers the waterlevel. Pressure Reducing Valves.—It is often necessary to providesteam at different pressures in the same building, as in a com-bined power and heating plant. In this case the reduction inpressure is accomplished by passing the steam through a reduc-ing valve. There are many different forms of these valves, allacting more or less upon the same general principles. In the valveshown in Fig. 39, the low pressure steam acts on the lower sideof a flexible diaphragm, and the weighted lever, which may beadjusted to give the desired reduction in pressure, acts upon theother side. The movement of this diaphragm causes a balancedvalve to open or close as may be necessary to maintain the desiredlower pressure. Back Pressure Valve.—This is a form of relief valve which isplaced in the outboard exhaust pipe from an engine to prevent PIPE, FITTING
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectventilation, bookyear
