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
Application	Temp °F	Humidity	Notes
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

Typical Application Standards
Application	Typical Conditions		Notes
Application	Temp °F	Humidity	Notes
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

Typical Application Standards
Application	Typical Conditions		Notes
Application	Temp °F	Humidity	Notes
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.