Document 7MJRLJ0B2DOdbJvmzO51eb56

Heating Ventilating Air Conditioning Guide 1939 Table 3. Drying Time and Conditions for Representative Materials*' Material Temperature Deo F. . Per Cent Relative Humiditt Drteiq Timb Banana Food in. Thick..-------:-------- Cores, Oil sand for molding.______ Vi--1 in. thick Black sand with goulic binder [ o jjj" Jufeu about 0.6 of time....---------- ---jj ^ck Cores, Radiator (in continuous ovens) 140-180 200 140 . 300 140 150-190 120 325 350 to 90 1100 150 165 180 110-150 150 95-100 170-210 150-200 160-180 400 Max 300 480 480 700 525-600 275-450 150 180 70 to 20 6 Hrs 2.5 Hrs 4-6 Hrs 15 Min 18 Hrs 40 Min 12 Min 24 Hrs, 108 Min 4.5 Hrs 2 Hrs 6 Hrs 24 Hrs 10 Hrs 4--6 Hrs 24 Hrs 2 Hrs 30 Min 2.5 Hrs 4.5 Hrs 10 Hrs 2-3 Hrs 1.5 Hrs ' 2 Hrs 225 290-425 225 2 Hrs + Air Dry 1 Hr 3 Hrs Furs. ....1....------------------ .......--...... . Glue bone, thin sheets on wire trays... 200 90-95 450 225-300 250 150-180 85-110 140 110 110 70-90 .70-90 r.nt ............. :............ Gypsum board 54 in. thick.......... ~...... f Start Wet Finish Gypsum block........................................... Hides heavy........................... ............................ ............. 150 350 275 350-190 180-200 150-190 120 140-180 90 70-90 40-50 1 Hr 18-36 Hrs 1 Hr 30-350 Min 1.5 Hrs ' 20-30 Min 2-6 Hrs 6-9 Days 2 Days 4 Hrs 60 Min 8-16 Hrs 1 Hr 2 Hrs 2-4 Hrs j 4-6 Days See references at end of chapter. 674 Chapter 35. Drying Systems Table 3. Drying Time and Conditions for Representative Materials*--Con. Material Temperature Deg F. Per Cent Relative Humiditt Dbttng Time 120-180 70-300 japan beds......................................................................... 300 300-450 200 140-180 78-95 90 80 110-145 Lithographing on tin color work........ ........................ 250-270 350 100-180 160-220 90-110 140-180 Matrix.. .................................... -..... ....... ....................... 350 Milk and other liquid foods spray dried....... ............ 135-300 95 Moulds green sand C.I. flasks (onef 8 in. thick 600 surface only exposed)..::\ 13 in. thick 700 180 250 90-95 75-140 150 150 350-140 180 90-200 140 Paper wall, varnished............... .................................... 140-160 150 135 140 150 Potatoes sliced-- ....... :......... ................................. .. 85 Potatoes steamed....................................... ..................... 170 Prunes 140 180 Rice 140 150 Rubber 300 85-90 140-200 Rugs....... 190 Salt.... . . 350 300 110 Shade cloth. Z...................... -......... .. Shirts... ......... .. ..... 240 120 Soap..................................................................................... 100-125 Starch 180-200 Stock feed mixed......................... .......... ......... -___ 180-220 100-110. Suear_... 250 150-200 1.5-2 Hrs 1.5 Hrs 30 Min 85 70 10-30 4 Days 2-3 Days 6-10 Hrs 18-25 Min 3-180 Days 2-14 Days 7.5-8 Hrs 15 Min Instantaneous 6 Hrs 13 Hrs - 6.5 Hrs 24 Hrs 35 8-24 Hrs 22-30 2.5 Hrs 45 15 Min 1-2 Min 26 Hrs 24 Hrs 6 Hrs 4 Hrs 6.5 Hrs' 10 Hrs 8 Hrs 6-12 Hrs : 1-2 Hrs 4-8 Hrs . . Rotary Drier 10-15 Min 1-2 Hrs 20 Min 12-72 Hrs 1-4 Hrs 20-30 Min 24 Hrs Low for 6 Hrs , 20-30 Min See references at end of chapter. 675 i i I