. The Street railway journal . her side of the wedges, which fit inside of theguards or rails in the body, to forbid any possibility of the valvebecoming disarranged. Wings are also cast on the top edge ofthe wedges and a collar with guides cast on the spindle as afactor of safety. Adjustable wedge gate valves of this type areso constructed that they have no more parts than a solid taper 378 STREET RAILWAY JOURNAL. [Vol. XXV. No. 8. wedge gate. The wedges have bronze facings. Even thebronze seats are screwed up in such a manner as to leave nopockets in the rear for the water and steam to attac
. The Street railway journal . her side of the wedges, which fit inside of theguards or rails in the body, to forbid any possibility of the valvebecoming disarranged. Wings are also cast on the top edge ofthe wedges and a collar with guides cast on the spindle as afactor of safety. Adjustable wedge gate valves of this type areso constructed that they have no more parts than a solid taper 378 STREET RAILWAY JOURNAL. [Vol. XXV. No. 8. wedge gate. The wedges have bronze facings. Even thebronze seats are screwed up in such a manner as to leave nopockets in the rear for the water and steam to attack thethreads. The correct mechanical construction of these valvesmakes them especially fitted for all classes of service. Fig. 2 shows the Anderson cushioned non-return valve, whichfills a vital point in the general piping system of steam powerplants. When valves of this type are placed between the boilersand header they equalize the pressure between the differentunits of a battery of boilers because they remain closed as long. AN INTERESTING CAR FOR A SOUTH AMERICAN RAILWAY as the boik-r pressure is lower than that of the header. Whenthe boiler and header pressures are equal, the valves open andremain in that position without chattering or hammering, onaccount of the dash-pot arrangement for cushioning thesevalves. They will cut off a boiler automatically in case of an
Size: 2433px × 1027px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
