Document 85g5R62pby633YBxKNLQ7Y6Ym

276 CHAPTER 23 1962 Guide And Data Book Table \ . Temperatures and Humidities Applicable to Industrial Air Conditioning--(Continued) Proem | leap. F j JLH.% FLOOR COVERING Linoleum: Mechanical oxidising of oil,, Printing................................................. Stoving process..'................................ 80 1W 160 to 250 Some operations are stabilized to prevent mold growth. Precise control of temperature is required for mechanical oxidizing of linseed oil. The rate of flow and the temperature of water in the jacket surrounding the tank must be controlled. Air filtration is recommended for the stoving process. FOUNDRIES* Core making............................................. Mold making: Bench work........................................... Floor work............................................ Pouring....................................................... Cleaning Room........................................ * Winter design room temp. 60 to 70 60 to 70 55 to 65 40 40 to 50 55 to 65 The charging room is usually untested. In core making fume-exhaust hoods are required for oven and for cooling areas adjacent to ovens. In mold making provide hoods at transfer points with wet collector dust removal system. Use 600 to 800 cfm per hood. Pouring rooms require two-epeed powered roof ventilators. Design for minimum of two cfm per sq ft floor area at low speed. Shielding is required to control radiation from hot surfaces. Proper introduction of air will minimise preheat requirements. In shakeout room provide hoods with wet-collector dustremoval system. Exhaust 400 to 500 cfm per sq ft grate area. Roof ventilators are generally not effective. In cleaning room provide hoods for griodera and cleaning equipment with dry cyclones or bag-type collectors. Winter ventilation (preheated) is required to the extent of replacing exhausted air. Summer ventilation is usually sup plemented by use of pedestal fans. Spot coolers are sometimes used in larger installations. FUR Shock treatment...................................... Storage............................................ no 18 to 20 40 to 60 55 to 65 Shock treatment, for eradication of any insect infestations, requires the lowering of tho temperature to 18-20 F for 3 to 4 days, then raising it to 60-70 F for 2 days, then lowering it once again to 18-20 F for 2 days and raising it to the storage tem perature. Furs remain pliable, oxidation is reduced, and color and luster are preserved when stored at 40 to 50 F. Mold growth is prevalent with humidities above 80 percent, while hair splitting is common where humidity is lower than 55 percent. GUM Manufacturing......................................... Rolling........................................................ Stripping.................................. .............. Breaking.................................................... Wrapping................................................... 77 68 72 74 74 33 63 53 47 58 LEATHER Drying j Storage, winter room Ump....................1 50 to 60 * Depends on tanning technique used. 40 to 60 After leather is moistened in preparation for rolliog and stretching, it is placed in an atmosphere held at room tempera ture with a relative humidity of 95 percent. Leather is usually stored in warehouses without tempera ture and humidity control. However, it is necessary to keep humidity sufficiently low euough to avoid mildew, which will vary with the technique. Air filtration is recommended (or fine finish. Process j Tcmp.F j (LR% LENSES (OPTICAL) Grinding..................................................... 75 80 45 80 The air must be free of dust and temperature and humidity held constant. To acquire desired cleanliness of air a combination of im pingement and electrostatic filters are used. Dust collectors are required for grinding operations. LIBRARIES AND MUSEUMS--See Chapter 27 Precea J 7tap. F j JLM.% MATCHES Manufacture................... ................... Drying........................................................ ' Storage..................................................... 72 to 74 70 to 75 60 to 62 50 60 50 Water evaporated is 18 to 20 lb per million matches simul taneously with the setting of the glue. The match machine will turn out about 750,000 matches per hour. Precaif | leap. F J fUt% MUSHROOMS Spawn added............................................ Growing period........................................ Storage....................................................... 120 to 140 60 to 75 48 to 60 32 to 35 nearly eat. 80 80 to 85 As spawn starts to grow, it is necessary to abruptly cool the mushroom house by 15 deg in a 12 hr period (approx.). Usually, this is the controlling {actor in selection of refrigeration equip ment, unless there is portable equipment available for such a purpose. Ductwork is usually of wood, due to the deterioration of ferrous metals during sweating-out period. Air filtration is essential in spawn rooms. Viscous filters are preferred, as mold spores are trapped in the viscous film. Odorless oil should be used. Heat of emission is 4 Btu per (hr) (sq ft of growing surface). Precast | JTemp. F ILH.% PAINT APPLICATION Lacquers: Air drying.............................................. Baking.................................................... Oil Paints: Air drying............................................. Paint Spraying........................................ 70-90 180-300 60-90 75 60 60 ' Spray booths to have 100 fpm face velocity. Make-up air must be preheated. Ovens must have air removed to keep fumes below explosive concentration. Equipment must be explosion- proof throughout. process and Product Air Conditioning 277 Table 1 .... Temperatures and Humidities Applicable to Industrial Air Conditioning--(Continued) (loom or Pfocea Temp. F 1 8Jt% Proem rmp. F tH.% PHARMACEUTICAL PHOTO STUDIO Powder storage (prior to mfg.)............ Manufactured powder storage and packing areas........................................ Milling room.......................................... Tablet compressing................................. Tablet coating room............................... Effervescent tablets and powders.... Hypodermic tablets................................ Cougb drops.......................................... Glandular products................................. Ampule manufacturing.......................... Gelatin capsules...................................... Capsule storage........................................ Micro-analysis.......................................... Biological manufacturing....................... Uver extracts........................................... Serums....................................................... Animal rooms........................................... Small animal rooms................................ * Depends on capsule size. 70 to 80 75 to 80 80 70 to 80 80 90 75 to 80 70 80 78 to 80 80 72 to 80* 75 75 to 80 80 70 to 80 74 to 78 75 to 80 75 to 78 30 to 35 15 to 35 35 40 35 15 30 30 to 50 40 5 to 10 35 40 to 50 35 to 40 50 35 20 to 30 50 40 47 to 43 Gelatin' capsules require varying, relative humidities, de pending upon size of capsule. Penicillin incubation process requires holding temperature within Vi deg F, with temperatures and humidity rigidly con trolled during all manufacturing phases. Ampule filling requires a 20 percent relative humidity when especially fine powders are used. Uncoated tablet manufacturing requires accurate control of temperature and relative humidity. liver extracts require a low relative humidity after they are dried. Temperatures higher than 80 F will cause the extracts to deteriorate. Tablet coating requires temperature control of the air intro duced to coating pans. Sterile conditions are essential in many pharmaceutical processes. Exhaust sufficient air to remove surplus material from tablet compressing machine. Air filtration is generally required, with positive air filtra tion in some areas. Amual Rooms in Pharmaceutical Laboratories In the following tabulation each of the items mentioned is equivalent in metabolism to one man: Quonlitf Anfmrd Weight Each 672 110 73 70 21 16 . 16 5 White Mice Rata Rats Guinea Pigs Rabbits Cats Monkeys Dogs 21 g 200 g 400 g 410 k 2.6 kg 3.0 kg 3.0 kg 14.0 kg Dogs are generally the worst offenders as far as odor genera tion is concerned. Decontamination of exhaust air is recommended in popu lated areas. For good air quality conditions the following space per ani mal and total air circulation (all outdoor or decontaminated m recirculation) should be provided: Animal cu ft cfm Animal cu ft cfm Mice Rats Guinea Pi Rabbits 3 4 6 10 ' 0.5 0.75 1.0 1.9 Hamsters 8 35 150 1.5 10.0 28.0 PHOTO MATERIAL--See Chapter 30 Dressing Room........................................ Drying Room........................................... Printing Room........................................ Setting Room.......................................... Developing Room................................... Storage Room.......................................... 74 75 to 80 70 72 70 to 75 60 40 50 70 65 60 45 to 55 Heat liberated during printing, enlarging, and drying procceses is removed through an independent exhaust system, which also serves the lamp houses and dryer hoods. Dust control is essential, and absolute filtration is required in some areas. PLASTICS Manufacturing areas: Thermo setting molding com- 75 to 80 45 to 65 Absolute filtration is required in some areas. Collection and removal of dust and fumes is essential. PLYWOOD Hot Pressing (resin)................................ Cold Pressing............................................. 90 90 60 15 to 25 POULTRY RAISING Incubator................................................... Brooder: 1st week................................................... 2nd week................................................. Battery room: Starting.................................................... Growing................................................... Egg storage................................................ 70-75 70-75 50-60 70 50-60 45-60 30-GO 60 60 70-75 50-60 70-80 Maximum ventilation is required for laying quarters during the summer months, while an attempt is made to maintain a temperature 10 deg above or below outdoor temperature during the winter, to minimise condensation on the exterior walls. This applies to bouses not having forced ventilation systems. PRECISION MACHINING--See Chapter 24 PRINTING--See Chapter 35 RUBBER DIPPED GOODS Manufacture............................................ Cementing................................................ Dipping surgical articles....................... Storage prior to manufacture............... Laboratory (ASTM Standard)............ 90 80 75 to 90 60 to 75 73.4 25 to 30* 25 to 30* 40 to 50* 50* * Dewpoint of the air must be below the evaporation tempera ture of the Bolycnt. __________________________ ______ Solvents used in manufacturing processes are usually ex- Edoaive and toxic, requiring positive ventilation. Volume manu- acturers usually install a solvent recovery system. --'' TEA Packaging................................................... 1 65 1-65 Ideal moisture content is 5 to 6% for quality and weight. Low limit moisture content for quality is 4%.