Quality,
not just in the name |
200 Tilton Road |
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Quality,
not just in the name |
200 Tilton Road |
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ApplicationsAttached is specific information on a common use of the QCI 4-Way Rotor Valve—Air Drying. The application can be found in almost any existing manufacturing company that dries its air supply of course also with the Original Equipment Manufacturers of these systems. Typically, the valves are large (2-8”), Carbon Steel or 316SS or a combination, 150# flanged and “LL” porting. A common spec for heatless (low temp) dryers would be 3” (Carbon Steel) valves, 3.04337LLRFL design. We can supply high temp units for heated (to 450 degrees F) dryers, series 3.04337LLRFLX__using high temp “RT” seals with SS reinforcing seal inserts. The valves are typically pneumatically actuated. There are also many two-way valves in these systems for you to pursue or you can promote our multi-ported actuated valves to cut the customers’ costs. Dual Tower Air Dryer Application The QCI 4-way valve is commonly used in a “heated” or heatless dual tower desiccant air dryer system. The 4-way valves are generally used in pairs, and control the airflow to and from the air dryer. There are two modes for the dryer; Adsorption (or dehydrated) and Regenerate (or ”regen”). The purpose of the dual tower air dryer is to do both simultaneously, assuring clean dry air to the plant at all times. The use of 4-way valves makes this possible. Tower #1 Adsorption / Tower #2 RegenerationTower #1: The air enters the inlet of the lower 4-way valve from the compressors (ranging from 100 to 150 psi at ambient temperature), which is filtered through the desiccant in tower #1. The clean and dry air then exits out to the plant through the top 4-way valve. Tower #2: On the heated dryers, air enters the inlet of the lower 4-way valve from the regeneration unit, which is positioned 180 degrees from the inlet in the 4-way valve from compressor (ranging typically from 1 to 15 psi). On the heated air dryers, the air temperature is gradually increased until it reaches a predetermined maximum temperature (typically ranging from 350 degrees F. to 450 degrees F.). The maximum temperature is maintained for a predetermined duration, and then is gradually cooled to ambient temperature. The hot air that is directed through Tower #2 vaporizes the moisture, which is carried through to the top 4-way valve, and exits trough a vent. When the generation cycle is complete, the desiccant in Tower #2 is now ready to use when the desiccant in Tower #1 becomes saturated. A similar procedure is performed with heatless dryer, but it is cycled more frequently without the heat to regenerate the desiccant bed. Some air dryers operate on a predetermined time cycle, while an option is to have the moisture level in Tower #1 continuously monitored at the output side of the tower. When the dew point reaches a predetermined level, and the desiccant bed in Tower #1 becomes “saturated” with moisture, the pressure is equalized through both towers, with the temperature usually returned to ambient on heated dryers, and both 4-way valves are switched simultaneously, reversing the process. Tower #2 Adsorption/ Tower #1 RegenerationTower #2: The air enters the inlet of the lower 4 –way valve from the compressors (ranging from 100 to 150 psi at ambient temperature), which is filtered through the desiccant in tower #2. The lean and dry air then exists out to the plant through the top 4-way valve. Tower #1: On the heated dryers, air enters the inlet of the lower 4-way valve from the regeneration unit, which is positioned 180 degrees from the inlet in the 4-way valve from the compressor (ranging Typically from 1 to 15 psi) the heater gradually increases the air temperature until it reaches a predetermined maximum temperature (typically ranging 350 degrees F. to 450 degrees F.). The maximum temperature is maintained for a predetermined duration, and then is gradually cooled to ambient temperature. The hot air that is directed through Tower #1 vaporizes the moisture, which is carried through to the top 4-way valve, and exits through a vent. When the regeneration cycle is complete, the desiccant in Tower #1 is now ready to use when the desiccant in Tower #2 becomes saturated. A similar procedure is preformed with heatless dryer, but it is cycled more frequently with the heat to regenerate the desiccant bed. Ref: Sanitary Spring/Purified Bottled Water Processing ValvesQCI OFFERS:
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