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Model ST Tank Types

Cement Lined Tanks
Provide Longer Service Life

 

What is the most common reason why a water heater fails?
 

 

Failure of a tank's protective lining allows water to come into direct contact with the steel tank causing it to corrode and leak.
Therefore, the type of protective lining is the single most important feature when determining the quality of any water heater. The ability of a lining to protect the steel tank is primarily based upon its thickness and complete coverage of all steel surfaces.
 

Linings Available For A Steel Tank
  1. Cement Lining
    A specially formulated Hydrastone cement applied to a minimum of 5/8" thickness on all surfaces. The cement lining covers 100% of all interior surfaces and is 125 times thicker than glass lining. Due to the thickness and guaranteed coverage of cement lining there is no need for a sacrificial anode. An extremely durable and long lasting lining suitable for hot and cold potable water storage in a variety of commercial and industrial applications.
  1. Phenolic Lining
    An epoxy coating applied in 2 coats to a total of 10-12 mils DFT. Typically used in process applications using low conductivity DI, distilled, or food grade water.
  2. Copper Lining
     A 3 lb./sq.ft. copper sheet approximately .0646" thick covers all interior surfaces. All copper sheet seams are factory tested to ensure long lasting protection of the steel vessel.
  1. Flame-Spray Copper
    Molten copper is sprayed on interior surfaces to a thickness of 5-6 mils. The copper bonds to the steel, and an additional overcoat of Phenolic lining is applied on the copper to seal all pores.
  2. Galvanizing
    The steel pressure vessel is pickled and hot dipped in molten zinc to create a barrier which internally and externally protects a steel vessel for cold and hot water storage.


Non-Ferrous Tanks

A solid Non-Ferrous tank does not require a lining because the pressure vessel itself is constructed from material which is impervious to the corrosive effects of hot water. This type of tank will provide a significantly longer service life than all lined steel tanks, but is initially more costly.

  1. Copper-Silicon
    A pressure vessel constructed from solid copper-silicon alloy offers tremendous tank longevity due to its ability to withstand the cycling effects induced from changes in water temperature and pressure. An extremely long lasting vessel suitable for storage of hot potable water in a variety of commercial and industrial applications.
  1. 90/10  Copper-Nickel
    A 90% Copper 10% Nickel alloy similar to copper-silicon, but with added strength and corrosion resistance. Typically used in applications with corrosive environments (salt water) or in critical commercial and industrial applications requiring long tank life.
  2. Stainless Steel
    Stainless steel (Specify: Type 304, 316, or 316L) is well suited for industrial and high purity applications requiring a corrosion resistant tank with minimal leaching of impurities into the water. Well suited for process, RO, and DI water systems in the pharmaceutical, food, and electronic industries.
 

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