http://www.che.com Chemical Engineering en-us 2013 Mon, 20 May 2013 1:20:14 EDT This company’s magnetic-drive pumps now exceed driving power of 515 kW, with flowrates of 3,500 m3/h, delivery heads of 160 m and system pressures from PN 16 to 400. They can operate at temperatures of... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/10478.html Wed, 1 May 2013 0:00:00 EDT The Hydro-Cell Metering Solutions line is comprised of six metering pumps ranging in capacity from 0.32 to 894.6 gal/h (1.21 to 3,386.4 L/h), with pressure ratings from 50 to 2,599 psi (3.4–172 bars). These pumps use variable frequency-drive... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/10486.html Wed, 1 May 2013 0:00:00 EDT Since 1962, this company has been manufacturing horizontal and vertical centrifugal pumps to handle corrosive and abrasive fluids. The pumps are made of various thermoplastics (PP, PVDF, PE-UHMW, PFA, PTFE) or stainless steel... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/10490.html Wed, 1 May 2013 0:00:00 EDT At AchemAsia, this company launched the new extrex EA, a localized extrusion pump suitable for most extrusion applications, delivering a differential pressure of up to 200 bars. The pumps are assembled in the company’s new facility in Shanghai... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/10493.html Wed, 1 May 2013 0:00:00 EDT Dickow Pump No cooling water needed for these hot-water pumps This company offers a wide range of hot-water pumps for temperatures up to 530°F and design pressures up to 1,160 psi. Due to high vapor pressures, standard mechanical seals cannot be used for higher temperatures. Although cooled mechanical... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/10286.html Fri, 1 Mar 2013 0:00:00 EST Designed for flow chemistry applications, the patented Asia Syringe Pump is said to give users a tool for performing flow reactions not possible using HPLC pumps or... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/10151.html Fri, 1 Feb 2013 0:00:00 EST This article provides detailed guidance for sizing centrifugal pumps early in the specification process, and provides several sample calculations to illustrate the concepts discussed... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/10179.html Fri, 1 Feb 2013 0:00:00 EST The portable, non-metallic Flex-I-Liner rotary peristaltic pump evacuates drums and totes containing acids, caustics, salts, chlorides and reagent-grade chemicals without corrosion of the pump or contamination of the fluid. The self-priming design of the Flex-I-Liner has no seals... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/10073.html Tue, 1 Jan 2013 0:00:00 EST The new DEPA Nopped S Diaphragm features an innovative “nopped” surface, designed to create advantageous flow conditions emulating the effect of golf-ball dimples. The use of Santoprene as its core material — a substance... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/10005.html Sat, 1 Dec 2012 0:00:00 EST The prices of low-voltage variable frequency drives (VFDs) have declined substantially since they were introduced, while the cost of power has increased. Normal project economics will now justify these VFDs — which go up to 375 kW (500 hp) or beyond — for pumps over the largest part of the range of application of the pumps. To efficiently evaluate and apply VFDs, process engineers need to know certain elementary things about them. They also need to know about the interactions of pumps and hydraulics when the pumps run at variable speeds. Further economic evaluation beyond the approximate method must be performed, but because low-voltage VFDs require only a small incremental capital investment, their application cannot justify a very detailed evaluation. Usually, screening level economics — as presented here — must be applied and some uncertainty must be accepted.... http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/9904.html Thu, 1 Nov 2012 0:00:00 EDT