. Journal of the New England Water Works Association . em is are innumerable reasons why consideration should be given tothe subject of protection against damage from broken water mains, and itis interesting to know that municipal authorities are beginning to morefully appreciate the savings which may be effected by the installation ofsuitable valve operating equipment. DEAN. 267 Electrical Systems Most Efficient. Intil numerous installations had been made and actually operatedover a period of time,there was considerable doubt in the minds of superin-tendents and others as to
. Journal of the New England Water Works Association . em is are innumerable reasons why consideration should be given tothe subject of protection against damage from broken water mains, and itis interesting to know that municipal authorities are beginning to morefully appreciate the savings which may be effected by the installation ofsuitable valve operating equipment. DEAN. 267 Electrical Systems Most Efficient. Intil numerous installations had been made and actually operatedover a period of time,there was considerable doubt in the minds of superin-tendents and others as to the reliability of electrically controlled is now, however, an established tact that a few well placed electricallyoperated and controlled valves will afford ample protection for any con-gested district. Further, it has been shown that electricity affords theonly system adopted to meet all of the varying conditions under whichvalves must operate. Electricity is the most reliable source of powerknown and is now almost universally Mechanical Position Indicator. The design and construction of the electric motor has been carried toa high degree of perfection and dependability. It is available for almostany use and can be made water-tight and able to withstand operationin the open exposed to snow and ice, and even while under water. Ob-viously the control apparatus can be ruggedly constructed and inclosedin a moisture and fool-proof casing so that :i complete system may beI milt up, all of the operating parts of which are fully protected againstoutside influences. By the employment of lead and steel covered cable, the conductorsmav be laid in an open t lench. 268 ELECTRIFICATION OF GATE VALVES. Valve Operating Apparatus. The large valves in street vaults present a number of difficulties forthe following reasons. Frequently the valve is very old, corroded anddifficult to operate. It is required to be closed against velocity due tobreak in the line. The control
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