Application

Humidity Control Information - Application on LOW HUMIDITY
Low Humidity Application are found in many industries, offices and warehouses.

Our customers include a wide range of users covering Military, Factories, Hospitals,
Warehouses, Libraries, Offices , Institutions and even Homes.

1) Semiconductors:
Most of the electronics components are sensitive to high humidity. Although the many finished product can with stand up to 90% non-condensing humidity, prolong exposure reduces their service life span. A lot of component storage requires a mild level of humidity like 50-55% RH to maintain a healthy shelf life. Many electronic components are extremely sensitive to moisture during its raw form. That is why many clean room for electronic component production has specified RH of between 30% to 45% RH. A lot of hard ware faults that do not occur in dry European countries are happening in the tropics simply because of our natural humidity.

2) Electrical: A typical high tension switch room requires low to mid range humidity during and immediately after
installation. High voltage short-circuit occurs when the insulation is moist. Switch gears are to be stored in low
humidity storage space.

3) Pharmaceuticals: Storage and production of tablets and powder medicine are highly sensitive to moisture. A common problem called “ caking” will occurred which caused lumping of the powder will render the entire production to useless waste. Other problem caused by high RH include fungal growth, bacteria infection etc.

Dry air is most important during the production as well as during the storage of pharmaceutical products.

	Tablet compressing- no powder sticking to the form with dry air
	Fluidized bed- With desiccant technology the drying can be drastically reduced. For temperature sensitive products desiccant drying is a must.
	Hard gelatin capsules- Dry air prevents the powder coagulation before the capsule is sealed
	Coating- Control of the humidity is a necessity when coating tablets with water-based products.
	Packing & storage- Paper package and labels are kept in a fresh condition with dry air.
	Sterile rooms & laboratories -Low relative humidity kills bacteria. The SSCR-rotor is ideal for these applications as it is bacterio-static and there's no give-off to the air.

Handling of ingredients - The air that comes into contact with hygroscope ingredients must be a low relative humidity
at weighing and blending

4) Archive: Films and papers will stick together if stored in moist place. Paper turns yellow and disintegrates.

5) Computer peripherals: Communication and computers last a lot longer if they are used in a less hostile
                     environment. A lot of loss of data and hardware problems are indirectly caused by high humidity.

6) Metal: A lot of metals are free from corrosion if the environment is dry. Even rust can be avoided from raw
                 iron if the RH is low in the environment.

7) Swimming pools: Swimming pools: Indoor swimming pools are usually extremely humid. It caused a sense
                     of stuffiness and reduces the swimmers’ perspiration process. Constant dehumidification is a definite
                     required process.

8) Food: Drying is usually part of food processing. Food exposed to moisture are subject to sogginess, lumping,
                contamination, fungal growth etc. Rice can be stored in a low humidity space for decades without
                spoiling. Biscuits can remain crispy after 5 years if the RH is low during its storage time.

Cheese storage in Falköping, Sweden. The Relative Humidity is controlled by 3 Seibu Giken DST RZ-units.

Cheese. Control of humidity is important while cheese is maturing. To achieve the best quality both the air humidity and the temperature must be held at specific levels.
Fish. Drying the very surface of the fish before smoking it prevents further moisture losses during the smoking process.
Confectionery. Control of the humidity is imperative when candy is coated. A high moisture content in the drying air causes stickiness as well as bad coating. The use of dry air during the cooling process of chocolate and candy enables a reduction in cooling time as well as preventing condensation forming on the products or the equipment. Packaging processes can also be improved, the dry air preventing the product sticking to the machines and wrapping materials.
Bread Several stages in the production of crisp bread require controlled air humidity. Dry air can be supplied in the fermentation step as well as in the final drying step. The quality of the finished product is maintained by humidity control in both packing and storage areas.
Sugar. Sugar granules will rapidly degrade or dissolve in humid conditions. To prevent moisture damage to bulk sugar, air at a constant 30% relative humidity is continuously circulated through the storage silos.

9) Marine: Cargo holes are to be dried after washing and spray painting needs a dry environment for the paint
to stay on with strong bond to the surface.

10) Plastic: A lot of plastic raw materials need to be dried before moulding.

11) Military: A lot of military gears must be stored at low RH to keep away from rust forming. Gun power
and explosive are particularly sensitive to moisture.

Military storaging
Since the 1970's, desiccant equipment has been used by National defenses all over the world for preservation by dehumidification. Inactive ships, tanks, aircraft, weapons and supplies are kept in dry air storages, provided by dehumidifiers. The technology enables an increased combat readiness and decreases the preservation costs drastically.

HMS Ark Royal, United Kingdom is kept in a state of extended readiness by 29 DST dehumidifier units.

	The material doesn't need to be checked as often as usual, which saves both time and personnel and consequently money.
	Thanks to the dry air, there will be no corrosion which increases the combat readiness. Sensitive electronic equipment is kept in good working order

F16, Belgium, is protected by DST dehumidifiers when on ground.

12) Wood processing: Wood is to be dried before processing.

13) Batteries production: Extremely low RH is required to batteries production.

14) Photography equipment: Lenses are particularly subject to fungal growth. Most films are moisture sensitive.

15) Leather Products: leathers are mold / fungal growing agent. Moisture spoils most leather products.

16) Warehousing & Storage: increasing numbers of high end warehousing complexes are installing humidity control system
to provide better storage environment to their customers.

Dry air storage are used for a variety of materials, corn, coffee, powders sugars, electronic equipment. As the name indicates, dry air is essential for maintained quality. Using air is far more economical than heating and ventilating large storage areas.

	Corrosion: Merchandise manufactured in materials such as iron and steel, demand low humidity. Vehicles, aircraft, machines and tools do not rust if the surrounding air is kept at a relative humidity below 50%.
	Mould: Organic materials such as leather and paintings, contain microorganisms. These can develop into fungus and mould, but will not occur if the relative humidity level is kept below 70%.
	Bacteria: Bacteria requires a high humidity to survive and to multiply. If the humidity level of the surrounding air is kept below 50%, most bacteria will not survive. The limit is especially important when storing food products which are susceptible to bacteria.

Corn, coffee, tobacco and powders are products, which maintain their quality when they are kept in dry air storages.

17) Water pump rooms: Usually water pipes and pumps have certain level of leak, and especially where chilled
water is used, condensation occurs where portion of the pipes are not too well insulated.

GOTO Recommended RH for various product

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Information on Humidity

Disclaimer : The information we offer above is not absolute and fool proof. For serious engineering calculation and load estimates, please
approach the trained professionals and authorities. Please consult us for detail calculation for installation that requires a
definite humidity level.