Archives :: Processing & Handling :: Liquid, Gas and Air Handling

Displaying 101 - 120 of 822 stories.
February 1, 2013
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.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/pumps/This-syringe-pump-delivers-continuous-smooth-flow_10151.html
February 1, 2013
Determining the proper preliminary size for centrifugal pumps during the initial stages of any pump-specification exercise requires numerous calculations and assumptions. This article reviews the steps needed to size centrifugal pumps during the early stages of a project, to support initial cost-estimation efforts. Such early pump-sizing efforts are important steps toward final pump selection and detailed...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/pumps/Sizing-Specifying-and-Selecting-Centrifugal-Pumps_10179.html
February 1, 2013
The new Hard Seat VHS Micro-Dispense Valve offers repeatable, non-contact dispensing of fluids in the nano- to microliter range. It features a...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/This-little-valve-has-a-zirconia-ball-and-seat_10143.html
February 1, 2013
  With the newly developed, high-precision 4090 pneumatic volume booster it is possible to amplify the air strength of the set point signal from the positioner to the actuator such that these control valves (depending on the nominal valve...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Control-valves-operate-four-times-faster-with-this-volume-booster_10167.html
February 1, 2013
Pressure-relief valves are widely and effectively used in situations where the pressure in a process vessel rises to above the vessel’s design-pressure rating. Proper relief-valve sizing is critical to plant and process safety to permit fluids sufficient flow area to exit the vessel. Sizing relief valves requires several equations for different flows (liquid flow, vapor flow and two-phase flow), as...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Sizing-Calculations-for-Pressure-Relief-Valves_10173.html
February 1, 2013
A company in Hamburg, Germany had been using a 20-m3 mixing silo with internal pipe auger for 20 years. By replacing the pipe auger (photo, left) with an open mixing...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/mixing/Slash-silo-mixing-times-with-this-open-mixing-screw_10159.html
January 1, 2013
An industrial compressed-air system is expected to supply air of defined quality, required pressure and desired quantity to all the plant air and instrument air consumers. With air being one of the most critical utilities of a chemical plant, a compressed air system should function efficiently and cost effectively. Therefore, designers should consider parameters such as air quality, air consumption and...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/compressors/Design-and-Specification-of-A-Compressed-Air-System_10085.html
January 1, 2013
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.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/pumps/Handle-acids-and-caustics-with-this-non-metallic-drum-pump_10073.html
January 1, 2013
The LEX3N-TZ is a high-performance, temperature-control trap for steam service that has a built-in scale-removal function. An auger is built into the steam trap to remove scale and solids buildup from the valve seat...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/steam_traps/This-steam-trap-has-scale-removal-capability_10057.html
January 1, 2013
The new micro dosing unit Type 7615 is a high-precision diaphragm pump for exact dosing in the microliter range. Comprised of three valves, the dosing unit doses 5...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/A-dosing-unit-for-microliter-volumes_10071.html
December 1, 2012
When it comes to rotating machinery (pumps, compressors, gas turbines, steam turbines, turbo-expanders, and others) operating in the chemical process industries (CPI), installation, piping, support, pre-commissioning, commissioning and startup play crucial roles. Machinery maintenance and repair can be quite costly, and perhaps because of shortages of skilled manpower, particularly at remote site...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/compressors/CPI-Machinery-Commissioning-Startup-and-Piping_9994.html
December 1, 2012
A new tubing solution for use in chemical dispensing applications is now available in Europe. The Tygon 2375 Ultra Chemical Resistant Tubing replaces the widely used Tygon 2075 line, providing an improved pressure rating...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/piping_and_tubing/Extended-service-life-with-this-tubing_10008.html
December 1, 2012
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.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/pumps/Flexibility-and-abrasion-resistance-offered-by-this-diaphragm_10005.html
December 1, 2012
The Titan Series TSG valve is designed to meet the most demanding applications involving heavy-duty abrasive materials, such as sand, gravel, coal, whole grains, metal powders or minerals. The TSG Valve handles dry...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Handle-heavy-duty-abrasive-materials-with-this-slide-gate_10002.html
November 1, 2012
Compressors: How to Achieve High Reliability & Availability. By Heinz P. Bloch and Fred K. Geitner. McGraw-Hill. 1221 Avenue of the Americas, New York, NY 10020. Web: mcgraw-hill.com. 2012. 268 pages. $50.00.   Reviewed by Amin Almasi, WorleyParsons Services Pty. Ltd., Australia   Large numbers of compressors fail in CPI (chemical process industries) plants every year, with some experiencing...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/compressors/Compressor-book-by-Heinz-Bloch-reviewed-by-WorleyParsons-Almasi_9887.html
November 1, 2012
One of the most significant limitations on the operation of dynamic compressors (axial and centrifugal compressors) is the low-flow limit known as “surge”. A sudden valve closing, such as for emergency shutdowns or for a suction/discharge valve, presents significant challenges to anti-surge valve sizing and selection. Anti-surge valve requirements depend to a large degree on the compressor...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/compressors/Anti-surge-Valves-for-Dynamic-Compressors_9903.html
November 1, 2012
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...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/pumps/Variable-Frequency-Drives-for-Centrifugal-Pumps_9904.html
November 1, 2012
The Model G3 Progressing Cavity Pump is designed for handling material with high solids content, and those that are semi-dry or caked. The product features a series of finger mechanisms...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/pumps/Handle-semi-dry-or-caked-substances-with-this-cavity-pump_9942.html
November 1, 2012
This company has unveiled an innovative, flush-batten-aluminum geodesic dome design, which may be considered a new paradigm in engineered cover technology. OptiDome features a double web I-Beam for...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/tanks_and_vessels/The-next-generation-in-dome-design-debuted-at-Weftec_9925.html
November 1, 2012
The Advanced Cylinder Management (ACM) system is an all-in-one solution for tracking and managing this gas supplier’s entire fleet of gas cylinders. Using specially designed tracking barcodes placed...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/tanks_and_vessels/Barcodes-track-cylinders-from-this-company_9939.html
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