. The Street railway journal . ving two engineunits, and of duplicate setsof water and dry vacuumpumps. PUMPS The condensing waterpumps are of the centrifugaltype, each having a capacityof about 3000 gals, per min-ute at 300 r. p. m. Each isdirect connected to a simple,non - condensing, horizontalHarrisburg engine. Theseare fitted with throttlingvalve governors to act as asafety speed limiting device,but the actual speed of theengine, and hence the quan-tity of water delivered to thecondensers, is controlled bya balanced Foster valve inthe steam line, operated bya water regulator in the pumpde
. The Street railway journal . ving two engineunits, and of duplicate setsof water and dry vacuumpumps. PUMPS The condensing waterpumps are of the centrifugaltype, each having a capacityof about 3000 gals, per min-ute at 300 r. p. m. Each isdirect connected to a simple,non - condensing, horizontalHarrisburg engine. Theseare fitted with throttlingvalve governors to act as asafety speed limiting device,but the actual speed of theengine, and hence the quan-tity of water delivered to thecondensers, is controlled bya balanced Foster valve inthe steam line, operated bya water regulator in the pumpdelivery. The dry vacuum pumpsare of the horizontal, double-acting, fly-wheel type, with8-in. x 16-in. steam and 12-in. x 16-in. air cylinders. Inaddition to their usual function of removing entrained airfrom the condenser, these pumps are cross-connected tothe suction pipes of the centrifugal pumps. This servesto prime the latter, when necessary, as the suction liftvaries considerably, being about 18 ft. under usual conditions,.
Size: 1425px × 1753px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
