. Electrical world. rated after it passes downthe tube C and reaches the bottom plate, on account of its beingheavier than the oil, and the surplus water passes into the pipe lead-ing to the automatic water separating device. Pop Safety Valves. The constantly increasing demand for Crane patent pop safetyvalves has made it necessary for the Crane Company, Chicago, to increase the capacity of its manufacturing departments on thesegoods. It has also brought out a number of improved forms of popvalves for stationary, marine, locomotive and portable boilers; also avariety of cylinder reliefs, water
. Electrical world. rated after it passes downthe tube C and reaches the bottom plate, on account of its beingheavier than the oil, and the surplus water passes into the pipe lead-ing to the automatic water separating device. Pop Safety Valves. The constantly increasing demand for Crane patent pop safetyvalves has made it necessary for the Crane Company, Chicago, to increase the capacity of its manufacturing departments on thesegoods. It has also brought out a number of improved forms of popvalves for stationary, marine, locomotive and portable boilers; also avariety of cylinder reliefs, water reliefs, high-pressure and hydraulicrelief valves for all purposes and pressures. The construction of these valves embodies a self-adjusting featurewhich automatically regulates the pop of the valve or maintainsthe least waste of steam between the opening and closing points, animprovement which will be readily appreciated, as there is no neces-sity of re-adjusting to regulate the pop on changes in the set POP S-\FETV V.^LVES. In all pop safety valves it is necessary to have a pop or huddlingchamber into which the steam expands when the main valve opens,thereby creating an additional lifting force proportionate to thisincreased area and greater than the force of spring, thus holding thevalve open until pressure is relieved. Means must also be providedto relieve this pop chamber of pressure, in order to allow the valveto close promptly and easily. This is accomplished by the self-ad-justing auxiliary valve and spring, which are entirely independent ofthe main valve and spring. The steam in the pop chamber finds apassage through holes or ports into an annular space provided inthe auxiliary valve or disc, and by reason of the light auxiliary springthis pressure lifts the auxiliary valve and allows the steam in thepop chamber to gradually escape, thus permitting a greater rangein setting pressures with the least waste of steam and at the sametime supplying a cushion or b
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
