http://www.che.com Chemical Engineering en-us 2013 Wed, 19 Jun 2013 15:05:39 EDT The cost to power fans and ventilators in the chemical process industries (CPI) is a significant consideration in efficient system design. Annual operating costs for these units can easily exceed the initial capital cost of the equipment in two years. The challenge for the design engineer is to develop a system that delivers sufficient air-handling capacity without consuming excessive power.... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/ducts_and_ventilation_systems/3149.html Fri, 1 Jun 2007 0:00:00 EDT     Reinforced PVC makes a kink-free hose Kink- and crush-resistant Vardex hose (photo) for both pressure and vacuum applications is now available from this manufacturer. Made of clear PVC with steel wire reinforcement, Vardex is suitable for either fluid or air transfer. Applications include... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/ducts_and_ventilation_systems/2838.html Fri, 1 Dec 2006 0:00:00 EST     A direct link between the size of particles and their potential for causing health problems is what has the U.S. Environmental Protection Agency (EPA; Washington, D.C.; epa.gov) concerned about particulate matter (PM) that is 10µm in diameter or smaller. Renewed concerns have prompted the... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/ducts_and_ventilation_systems/3070.html Wed, 1 Mar 2006 0:00:00 EST