Document Rw7kmR4zVm0jdVa29N0jRyM7

United States Radiator Corporation Boilers 27 Inch, S230 and S270 Series Another line of Capitol Smoke less Boilers is exemplified by the 27 inch, S230 and S270 Series, of which the latter is illustrated in the interior view at the right. These are regular updraft boilers so designed that they may be operated smokelessly with proper attention. The important smokeless feature of these boilers is the inverted bridgewall or curtain section through which heated auxiliary air filters over the fire for complete combustion. When firing these boilers the coking method should be applied, that is. the initial fire should be pushed to the rear of the grate and new fuel added at the front. The gases distilled from the green coal pass under the curtain where they mix with auxiliary air. The combustible mixture is forced to pass close to the surface of the hot coke fire at the rear where combustion takes place. 40 Series Capitol Smokeless Boiler 40 Inch Series A more recent Smokeless Boiler development of the United States Radiator Corporation is the 40 Inch Series. The operation of the 40 Inch Series is similar to that of the S230 and S270 except that auxiliary air enters through patented air passages in the front section. Admission of air at the front permits combustion of a large part of the gases before they pass under the curtain. As the gases pass under the curtain they are heatod to a higher temperature and combus tion is completed as they enter the flues. The Performance Curve shown below is typical of this type of boiler. Dt YELOPCD CAPACITY - SQ.FT. Performance Curve for No. 1140 Capitol Smokeless Boiler 344 United States Radiator Corporation Boilers 50 Inch Series The largest of the more recent series of Capitol Smokeless Boilers developed by the Capitol Testing Laboratory is that known as the 50 in. series. These boilers contain a large furnace where bituminous coal undergoes rapid com bustion. The main air supply is admitted through the grates and the fuel bed. Auxiliary air for smokeless combustion is admitted at the front of the furnace through passages leading from the ashpit to a point just above the level of the fuel bed. This air is properly proportioned for best results. It is pre-heated and mixes with the volatile gases distilled from the fuel. , An additional supply of auxiliary air- is furnished through an inverted bridgewall or curtain section. This air is also pre-heated and filters over the fire, assuring most complete combustion and highest efficiency. CAPITOL SMOKELESS BOILERS--Ratings and Dimensions Rating, SquareFeet No. Steam Water . 627 727 827 927 1027 1127 1227 S237 S238 S239 S240 S24I 408 409 410 411 412 413 414 740 840 940 1040 1140 1240 1340 S277 S278 S279 * S280 szai S282 S283 S284 750 850 950 1050 1150 1250 1350 508 509 510 511 512 513 514 515 516 " 1800 2200 2600 3000 3400 3800 4200 2800 3250 3700 4150 4600 3300 3850 4400 4950 5500 6050 6600 4475 5250 6025 6800 7575 6350 9125 5475 6400 7325 6250 9175 10100 11025 11950 7800 8850 9900 10950 12000 13050 14100 6275 7150 8025 6900 9775 10650 11525 12400 13275 2975 3625 4275 4925 5575 6225 6875 4650 5450 ,, 6150 69007600 5230 6160 7040 7920 8800 9680 10560 7350 8650 9950 11250 12550 13850 15150 9000 10525 12050 13575 15100 16625 18100 19600 12875 14600 16325 18050 19775 21500 23225 10000 11400 13000 14250 15650 17050 18450 19850 21250 Height Water Line Inches 4455%A 45% 45% 45Vi 55 55 55 55 55 49 49 49 49 49 49 49 49 49 49 49 49 49 49 66 66 66 66 66 66 . 66 66 66 66 66 66 66 66 66 66 66 66 66 *66 -66 .66 66 66 Coal Square Feet Capacity Cubic Feet Outlets and 'inlets Inches 5.32 6.55 7.78 9.01 10.24 11.47 12.70 10.94 12.77 14.61 16.44 18.27 8.15 8.15 10.31 12.42 12.47 14.63 14.63 8.15 10.31 10.31 12.47 14.63 14.63 16.79 18.29 21.33 24.37 24.37 27.41 27.41 30.45 30.45 16.29 21.33 21.33 24.37 24.37 27.41 27.41 11.58 14.62 17.66 17.66 I8i49 21.53 21.53 24.57 27.61 . 7.50 9.28 11.00 12.48 14.15 15.81 17.50 16.49 19.22 21.96 24.70 27.44 9.00 10.40 13.30 14.70 16.30 17.70 19.25 tO.40 13.30 13.30 16.30 19.25 19.25 22.20 29.67 ' 34.68 39.69 39.69 42.20 44.71 47.22 49.72 30.95 36.00 36.00 41.20 41.20 46.22 46.22 18.87 23.73 25.80 28.59 29.58 34.51 37.80 41.09 44.37 2-4" 2-4" 3-4 3-4" 3-4"' 3-4" 4-4" 3-4" 3-4" 3-4" 4-4" 4-4" 2-5" 2-5" 3-5" 3-5" 3-5" 3-5" 4-5" 2-5" 2-5 2-5" 3-5" 3-5" 3-5" 3-5" 3-5" 3-5" 4-5" 4-5" 4-S" 4-5" 5-5" 5-5" 3-5" 4-5" 4-5" 5-5" 6-5" 6-5* 6-5" 3-5" 4-5" 4-5" 4-5" 5-5" 5-5" 5-5" 6-5" 6-5" Minimum Chimney Sizes Height Feet Dimensions Inches 40 12x12 40 12x12 45 12x12 45 12x16 45 12x16 50 12x16 50 12x16 45 16x16 50 16x16 55 16x16 60 16x16 60 16x20 50 18x18 50 18x18 55 20x20 55 - 20x20 55 22x22 60 24x24 60 24x24 50 - 18x18 55 18x20 60 20x20 65 20x24 70 24x24 70 24x2875 24x28 55 24x24 60 24x24 60 24x24 65 24x28 70 28x28 70 28x28 75 28x32 80 32x32 55 24x24 60 24x24 65 24x28 70 24x28 60 28x28 90 28x32 95- 32x32 60 24x24 65 24x24 70 24x28 80 28x28 85 28x32 85 . 32x32 90 32x32 90 32x36 90 36x36 All 40 and 400 Series have two 6-inch inlets on rear of back section. AU 27 Series have two 4-inch inlets on rear of back section. . . . ,.. Dimensions, inclusive of trimmings: 27 Series, bright 68>4 inches, width 50^i inches 8230 Series, height 78 inches, width 58J<f inches 400 Series,' height 71 inches, width 75 inches 40 Series, bright 71 inches, width 75inches S270 Series, bright 92 inches, width 82inches 50 Series, bright 92 inches, width 82inches 500 Series, height 92 inches, width 82 inches