. Electric railway journal . exhaust lines are connected. Anatmospheric relief valve is in each linenear the receiver. This is a stand-ard relief valve weighted to open on about 28 lb. persquare inch absolute pressure by means of a hydraulicpiston and standpipe accumulator. The three lines leadinto a tapered header, from which two 30-in. risers,sealed with back pressure valves, extend above theroof. From the header a 42-in. pipe leads to the feed-water heater. This is also protected with a riser andvalve. Between the receiver and the feed-water heater isa thermal or heat-balance valve for equa
. Electric railway journal . exhaust lines are connected. Anatmospheric relief valve is in each linenear the receiver. This is a stand-ard relief valve weighted to open on about 28 lb. persquare inch absolute pressure by means of a hydraulicpiston and standpipe accumulator. The three lines leadinto a tapered header, from which two 30-in. risers,sealed with back pressure valves, extend above theroof. From the header a 42-in. pipe leads to the feed-water heater. This is also protected with a riser andvalve. Between the receiver and the feed-water heater isa thermal or heat-balance valve for equalizing thedistribution of heat in the system. This valve is shownin cross-section in Fig. 11. Its function is to bleedsteam from the receiver into the heater when there isa deficiency of supply to the latter from the auxiliaries,or vice versa. At about 27,000 kw the receiver pres-sure reaches atmospheric pressure, continuing to riseuntil at 32,000 kw it is about 3-lb. gage. In the figure the left-hand opening in the chamber.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
