Engineered Systems February 2012 by Robert Beverly

By Robert Beverly

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The elastomer formulation and dimensions of the sealing element are designed to provide even, uniform volumetric expansion. Virgin rubber is used to ensure the sealing element is evenly vulcanized into a consistent, expandable unit. Recycled rubber and synthetic fillers are sometimes used to control costs, but at the expense of consistent, uniform expansion. Because the seals are supplied on belts, it is imperative that they be as close to the same hardness or durometer as possible. For example, if a belt of seals with different hardness values goes into the same penetration and the same torque is applied to each link, they will not expand uniformly and the seals can be compromised.

Virgin rubber is used to ensure the sealing element is evenly vulcanized into a consistent, expandable unit. Recycled rubber and synthetic fillers are sometimes used to control costs, but at the expense of consistent, uniform expansion. Because the seals are supplied on belts, it is imperative that they be as close to the same hardness or durometer as possible. For example, if a belt of seals with different hardness values goes into the same penetration and the same torque is applied to each link, they will not expand uniformly and the seals can be compromised.

However, because the fogging system would lower the air temperature, requiring additional heat input, the total cost comes to $106,703/yr, or about $30,000 less in energy costs than using a gas boiler. Stephenson says that one other factor that led to selecting a fogging humidification system was that the chemistry building already had a system for producing deionized water. “Producing clean water is one of the key pieces of producing a trouble-free humidifier,” he says. ” KEEPING COMFORTABLE ISU installed a single Mee high-pressure fogging system to service all five air handlers.

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