DEHUMIDIFICATION APPLICATIONSDEHUMIDIFICATION SERVICESDEHUMIDIFICATION PRODUCTS


 

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Typical Dry Air Application Standards

The applications below represent a very small percentage of the needs and uses for dry air; the conditions cited are typical of past uses. Specific needs change, as do technology and manufacturing processes.

Your Bry-Air representative can determine appropriate values for a particular application.

Typical Application Standards
Application Typical Conditions Notes
Temp °F Humidity
Aerosols 80 2 gr/lb dry air Use hood over Freon charging nozzle and purgehood with very dry air
Brewing and Distilling
Hops Storage
Fermentation Rms
Filter Rooms
Grain Storage
35
60
60% rh
45% rh
45% rh
40% rh
To reduce mold growth on walls
To reduce mold growth on walls
Baking
Sugar Storage
Icing and Glazing
Cookie Drying
Filled Cookie Setting
Potato Chips
80
80
65
20-30
75-80
35% rh
35% rh
20% rh
20% rh
Dry Air to minimize defrost requirement
Candy
Caramel Cooling
Bar Cooling
Chocolate
Hard Candy Making
Hard Candy Packing
Sugar Storage
60
0
90
75
75
80
40% rh
40%-50% rh
13% rh
35% rh
35% rh
35% rh
Care should be exercised in the systems design to insure against recirculating air-borne sugar dust in the system
Concentrates
Molasses Grinding
Honey Grinding
Instant Coffee Packing
Citrus Crystal Packing
80
80
Less than 25% rh
Less than 25% rh
20% rh
15% rh
Do not recirculate - Pre-cool and dry to 20-25 gr/lb
Ferrous Cupola Dry Blast   40 gr/lb dry air  
Crystal Growing   Varies Dependent on particular salt
Crystal Cutting   Varies Dependent on particular salt
Coils-Electronic   Lowest possible
1-3 gr/lb dry air
Prevent moisture absorption by insulation
Coils - TV and X-Ray 72 15% rh  
Transformer Manufacturing and Rebuilding 80 5% rh  
Elec. Appliances 72 15% In blankets and pads with Nylon sheathing orinsulation, moisture causes shorting and change in electrical characteristicsand moisture absorbed in sealed sheath heating elements can cause failure andeven explosion
Lightning Arrestor (Assembly) 60 20% rh  

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Typical Application Standards
Application Typical Conditions Notes
Temp °F Humidity
Switch Gear Assembly 68 20-24% rh  
Lamination 80 20% rh max Paper, cloth or wood, glass fibers, etc. bonded with plastic, shellac, varnish or glue. Store material at 20%rh to insure good bond. Store finished goods at less than 80° F at 20% rh to prevent adhesion.
Chinchilla Raising 32-35 18-25% rh High humidity is a health hazard. Low temperature and humidity provide denser and better pelts.
Matches 70 40% rh For drying
Paper Coating 80 20% rh For paper storage prior to coating with wax, plastic, adhesive, etc. To insure bond (See lamination) (Limit paper to 4% moisture)
Paint Spraying and Lacquering 80 50% rh or less Control spray booth or cabinet to prevent blushing caused by moisture condensing on evaporative cooled surface (evaporation of paint or lacquer solvent) Do not recirculate.
Paper & Fiber Molding 80 20% rh Finished-good storage to prevent sticky condition and loss of shape
Printing & Binding 90 30% rh Paper storage to prevent excessive moisture content (4-6% maximum) and resultant high static electric charge. Changes in moisture content between impressions causes poor register.
Pharmaceuticals
Ampoule Mfg.
Penicillin Packaging
Capsule Storage
Colloids
Cough Syrups
Cough Drops
Effervescent
80
80
75
70
80
70
90
30% rh
5-15% rh
35-40% rh
35% rh
40% rh
30% rh
15% rh
Hygroscopic Product
Gelatin softens and distorts at higher temperature and humidity
Similar to hard candy
Powders or tablets
Extracts -
Glandular
Liver
70-80
70-80
5-10% rh
5-10% rh
 
Tablet Coating 80 5-30% rh
Tablet Compressing 70-80 10-30% rh
Powder Storage 70-80 15-30% rh
Powder Mfgr 70-80 15-30% rh
Powder Milling 80 35% rh
Plastics, Nylon, etc. 3-15% rh 35% rh For drying and storage prior to molding
Plastics, Manufacturing Area
for Thermo Setting and
Moulding Compounds
80 25-30% rh  
TV-Radio Broadcasting 70 20% rh Tape head life extension

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Typical Application Standards
Application Typical Conditions Notes
Temp °F Humidity
Plastics, Laminated
Built-up areas
Parchment storage
70
70
20% rh
35% rh
High efficiency filters required to eliminate dust and fumes
Plywood 90 15-25% rh Cold pressing
Rubber Products      
Dipped Goods 75-90 25-30% rh Dew point of air must be below evaporation temperature of solvent
Cementing 80 25-30% rh
Tire Cord 125 7% rh For storage to prevent moisture absorption & resulting loss in adhesion with rubber
Glass Laminating 68-70 15-20% rh To insure good long life bond
Explosives
Gun Powder, Solid Fuels
35-75 10-50% rh Range is great dependent on material, but storage is critical - e.g. - solid fuel power is calculated with consideration of time stored at given condition
Freezer Tunnel Vestibules 75 10-20% rh Introduce air as curtain in front of tunnel opening
Pipe Galleries 40-80 40-50% rh Maintain space dew point below piped fluid temperature to eliminate condensation. Maintain temperature to eliminate corrosion.
Telephone & Electrical
Cable Wrapping
80 5 - 20% rh Extra high voltage cable wrapping has no lower limit on moisture.
Upper limit is about 5% rh.
Seed Drying & Storage 35-80 10-25% rh Low temperature drying and low rh storage preserves germination potential
Food Drying Bins 95-105 2 gr/lb dry air Spices - condiments
Transformer (Electric) 90 10-25% rh  
Transistors 72-75 25-40% rh  
Tubes - Radio      
TV - Lighting 90 15-25% rh Drying inside coating - There is no minimum moisture level - The dryer the air - the better
Missiles 35
80
35% rh
25% rh
Purging and cooling
Assembly
Fertilizer Storage AMB 40-50 rh Deliver air, 1-1/2 air changes/hour at 25% rh when corrected to ambient dry bulb.

The above applications represent a very small percentage of the needs and uses for dry air; the conditions cited are typical of past uses. Specific needs change, as do technology and manufacturing processes.

Your Bry-Air representative can determine appropriate values for a particular application.

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