H3-FV14A reductores de velocidad flender Helical gear reducers H3

Flender/Flender Gear Units/Helical gear reducers H3

es within the transport vehicle (warm air can absorbmore moisture). 2.4 Gas Composition The gas composition in transport vehicles can affect the shelf life of fresh produce. Changes in concentrations of gases such as oxygen ( and carbon dioxide (CO may prolong storage life. However, extremely high or low levels of any gas may lead to physio-logical disorders on some fruits and vegetables. In addition, the accumulation of volatile gases released by the produce (such as ethylene [ 2H4]) or other sources may be harmful to the produce. modied atmosphere inside the vehicle can thus be benecial or detri-mental to horticultural produce. To prevent the accumulation of any undesirable gases or volatiles in produce ship- ments, adequate ventilation is required. This can normally be accomplished by adjustingvents on trailers, containers, and railcars. During transport, controlled or modied atmosphere (CA or MA) can be used as preservation method to supplement refrigeration. The terms CAandMAimply the addition or removal of gases to alter the normal atmospheric composition surrounding the produce(Wills et al., . The levels of CO 2, 2, 2, and 2H4within the vehicle can thus be manipulated. CA is attained when the concentrations of gases are actively maintained atpredetermined levels. In MA, the gas composition is modied initially by injecting mix-ture of gases into the sealed environment. However, the gas composition is not consistently replenished afterward. The benet or hazard of such atmospheric modications varies greatly with commodity, cultivar, physiological stage, atmospheric composition, tempera-ture, and duration of the application (Kader, . Recommended CA/MA conditionsduring transport and/or storage for selected produce are listed in Kader (. MA can be used in all modes of transport. Nevertheless, it is more commonly used Transportation and Handling 5 in railcars, trailers, and intermodal containers (Kader, . MA storage of strawberries is probably the