. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . to connect therelease end of the release piston to theatmosphere, to blank the port leading tothe application end and close the serviceport. In application position, it connects theservice and auxiliary reservoir, blanks theport leading to the release and of therelease piston, opens the port leading to connects the high pressure valve port tothe seat of the emergency slide valve andconnects a bleed port from the equalizingslide valve to the atmosphere. It has been stated that one of the dutie
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . to connect therelease end of the release piston to theatmosphere, to blank the port leading tothe application end and close the serviceport. In application position, it connects theservice and auxiliary reservoir, blanks theport leading to the release and of therelease piston, opens the port leading to connects the high pressure valve port tothe seat of the emergency slide valve andconnects a bleed port from the equalizingslide valve to the atmosphere. It has been stated that one of the dutiesof the equalizing piston is to limit theamount of brake pipe reduction in electricservice application; this may be said tobe the duty of the reduction limiting valvewhich is located in the equalizing pistonand moved by it. The object of the service reservoircharging valve is to prevent the chargingof the service reservoir until such timeas the auxiliary reservoir pressure iswithin 5 lbs. of the emergency reservoirpressure. The object of the service port checkvalve is to prevent a back flow of air. reservoir, from 0 to 105 lbs., in 84 seconds. After a 25 lb. reduction the auxiliaryreservoir should recharge to 110 lbs., infrom 8 to 12 seconds. In graduated release position, the auxil-iary reservoir is recharged from th? emer-gency reservoir at the same rate that brakepipe pressure is restored, and as theemergency reservoir is seven times thesize of the auxiliary, a very finely gradu-ated release is possible; in fact, moregraduations can be made than ever willbe necessary. The present No. 12 valve differs slight-ly from the one originally shown in thesecolumns in the emergency portion in thata graduating valve has been added to theemergency slide valve; otherwise anyprevious references to the universal valveare applicable to the present one. The duties of the equalizing piston areto close and open the auxiliary and emer-gency reservoir charging ports, actuatethe equalizing slide
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
