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American Society of Heating and Ventilating Engineers Guide, 1937 Table 3. Drying Time and Conditions for Representative Materials3 MATgftlAT. Temperature Deo F Per Cent Relative HuKIDITT Drtinq .Time 140-180 200 2.5 Hrs 140 4-6 Hrs 300 15 Min 140 18 Hrs 150-190 120 40 Min 325 12 Min 350 to 90 24 Hrs 1100 150 4.5 Hrs 165 2 Hrs 180 5 Hrs 110-150 150 70 to 20 24 Hrs 95-100 170-210 10 Hrs 150-200 4--6 Hrs 160-180 24 Hrs 400 Max 2 Hrs Cores, Oil sand for molding.______ ]^r --1 in. thick 300 30 Min Black sand with goulic binder about 0.6 of time............. ....... 3 in. 8 in. 16 in. thick thick thick 480 480 700 2.5 Hrs 4.5 Hrs 10 Hrs Cores, Crank case (in continuous over 525-600 2-3 Hrs Cores, Radiator (in continuous ovens] 275-450 . 1.5 Hrs Cornstalk Board___________________ 150 2 Hrs 180 225 290-425 225 2 Hrs + Air Dry 1 Hr 3 Hrs Fence posts green.............................. .... - v........ 200 90-95 40-50 450 225-300 250 150-180 85-110 140 Furs 110 110 70-90 70-90 130 Gut:___________________________________ _ 150 Gypsum board JHs in. thick.................. f [ Start Wet Finish 350 . 275 350 to 190 180-200 150-190 120 Hats felt....... ......................................................... l..,, 140-180 Hides thin leather 90 Hides heavy.......................................................... .... 70-90 1 Hr 18-36 Hrs 1 Hr 30-350 Min 1.5 Hrs 20-30 Min 2-6 6-9 Days 2 Days 4 Hrs 60 Min 8-16 Hrs 1 Hr 2 Hrs 2-4 Hrs 4-6 Days ftSee references at end of chapter. 748 Chapter 41--Drying Systems Table 3. Drying Time and Conditions for Representative Materials3--Con. Material Temperature Deo F Per Cent Relative' Humidnr Drtinq Time 120-180 70-300 300 300-450 200 140-180 Leather mulling--............................. ............ .......... 78-95 90 80 Linoleum varnish............... ............................ ........ . 110-145 250-270 350 100-180 160-220 90-110 140-180 350 Mi|V and other liquid foods sprav dried................. 135-300 95 Moulds green sand C.l. flasks (one/ 8 in. thick 600 surface only exposed).....................\ 13 in. thick 700 180 Motors, stators.............. ..... ........ ........ .-................... 250 90-95 75-140 150 150 350-140 180 90-200 140 140-160 150 135 140 150 85 170 Prunes... .................................................................... 140 Ra^s 180 Ramie fiber.. ..................................... . .................. 140 Rice . 150 Rock wool insulation 300 Rubber........ 85-90 Rubber reclaimed 140-200 Rues.......... 190 Salt.... 350 Sand loose 1 in. deep 300 Sausage casings no Shade cloth.. 240 Shirts.. __ Soao.. Starch.... Stock feed mixed 120 100-125 180-200 180-220 Storage batterv plates 100-110 Sugar.. 250 150-200 1.5-2 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 10 Hrs 6 Hrs 13 Hrs 6 Hrs 6.5 Hrs 24 Hrs 35 8-24 Hrs 22-30 2.5 Hrs 3 Min 45 15 Min 1--2 Min 26 Hrs 24 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 20-30 Min 90 for 24 Hrs Low for 6 Hrs 20-30 Min *See references at end of chapter. 749