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Ans. :1) Montmorillonite Clay- A calcium aluminum silicate type of hydrous clay which is ground, processed and bagged. It is a naturally occurring non-hazardous substance. Clay, the least expensive of all desiccants, is used in most industrial applications requiring humidity control.
2) Silica Gel- A form of silica manufactured from sodium silicate and sulfuric acid. Like Clay, Silica Gel is non-hazardous and is capable of adsorbing 40% of its weight in water vapor at 100% humidity. Silica Gel has a porous molecular structure that closely resembles a sponge, and has the highest capacity of any commercial desiccant for moisture adsorption.
3) Molecular Sieve- A manufactured crystalline version of Zeolite containing a network of uniform pores and empty cavities. Molecular sieve is derived from sodium, potassium or calcium alumina silicate. It is a non-hazardous material. Molecular sieve is the desiccant of choice for the most demanding and unique applications. Molecular sieve is the most aggressive and expensive of the primary desiccants.
*Carbon-Although not a desiccant, Carbon is often used alone or in blends in packaging applications where odor is an issue (i.e. vitamin packaging).
Ans. : All three major types of desiccants are available in Pillow Pak from 0.25 gram to 14 gram and Unit Pak from1/6 unit to 80 unit (approx. 5.8 lbs.). Silica Gel and Clay are also available in bulk bags, as well as custom blends of two or more desiccants.
Ans. : To be used most effectively, desiccants should be used within a closed/sealed moisture barrier or a rigid/sealed container. Humidity indicating cards are generally placed inside the container to show the humidity level and indicate when the desiccant needs to be replaced.
Ans. : It depends. Packaging and environment dramatically affect the lifetime of the desiccant. In a tightly sealed environment desiccants can last for years
Ans. : No. The desiccants are non-toxic and you should not have any ill effects. As always if you are having symptoms seek medical attention.
Ans : Because it's not food.
Ans. : A "Unit" is the quantity of desiccant required to fill the Military specifications (Mil-D-3464) for desiccant products. Under this specification, a "Unit" is the quantity of desiccant which will adsorb 3.00 grams of water vapor at 20% relative humidity or 6.00 grams of water vapor at 40% relative humidity. More precisely, a "Unit" of Clay is typically 33 grams, and a "Unit" of Silica gel and Molecular sieve is typically 28 grams.
Ans. : Dessicare packages desiccants in Tyvek® (heat sealed), Kraft paper (heat sealed), and Sewn Bags (non-woven rayon/Polyester blend).
Ans. : HIC cards are designed to measure the relative humidity within an environment. The humidity level is indicated by a color change of the dots from blue (dry) to pink (wet). The current humidity level is read at the lavender (between blue and pink) color dot.
HIC cards come in a variety of styles.
Ans. : Oxygen absorbers remove oxygen from the head space. The absorbers are used to protect food and pharmaceutical products that are sensitive to oxygen.
Ans. : Electronic Parts, Computers, Pharmaceutical and Vitamin Packaging, Metal Parts, Food Packaging, Aerospace, Pet Foods, Leather Products, Metal Powders, Powdered or Beaded Glass, & Bulk Powdered Chemicals.
Ans. : Each jack has two pairs of case hardened grip jaws made of special grade of steel. At any given point of time, either one of the pairs is engaged or locked. During lifting both the pairs are in “locked” position. In this position, the jack can move only upwards. Therefore, the tank cannot fall down when held by the jacks.
Ans. : The number of trestle required for a tank is settled by :
a) The maximum distance between the trestles is 3 mtrs weight of the tank. The vertical load is max 3,3.5,6,12,18,25 ton per trestle, depending upon the type of jacking equipment selected
b) The maximum wind load on the trestles.
c) The maximum distance between the lifting points in the shell with regard to the stability of shell.
d) The normal maximum distance between the trestles is 3 mtrs.