Lectures On Fire Insurance Being the Substance of Lectures Given Before the Eve
Lectures On Fire Insurance Being the Substance of Lectures Given Before the Eve
Insurance Library Association of Boston
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The springs maintain a load of about one pound per square inch on the suction valves, and two or three PUMPS 235 pounds on the discharge valves. Extra stiff springs are used on The Water suction valves when water is taken under a head. These rubber End. Valves tend to stick to their seats, so the rule is made that fire pumps be run a little every week to keep them in good condition. Valve stems and seat rings are of bronze, the latter being firmly expanded into the casting to prevent their work...ing loose. The pipe Jiang'es \)YOY\de for large sized pipe connections, as follows — : Size of Pump -Suction Pipe Discharge Pipe 500 gals. 8 6 750 gals. 10 8 1, 000 gals. 12 8 Steam Exhaust 3 4 3^ 4 4 5 A National Standard 1000 gal. Rotary Fire Pump. 236 LECTURES ON FIRE INSURANCE Vacuum and air pressure chambers are provided on the suction and the discharge pipes to care for the pulsations and steady the flow. Miscellaneous Gauges are provided for indicating the steam and the water Fittings. Pressure.
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