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

Displaying 1 - 20 of 165 stories.
August 1, 2010
Conventional trial-and-error vibration troubleshooting methods often fail to achieve the longterm, trouble-free pump operation sought, yet they can be time-consuming and increasingly costly to apply. Advanced tools are sometimes required for more subtle vibration problems that can still have a large impact....
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/Fine-tuning-Pump-Vibration-Diagnostics_5899.html
July 22, 2010
IDEX Corp. (Northbrook, Ill.; www.idexcorp.com) has acquired OBL, S.r.l. (Milan, Italy; www.obl.it), a leading provider of mechanical and hydraulic diaphragm pumps. OBL provides...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/IDEX-acquires-OBL_5861.html
June 1, 2010
Incorporating fire safety into plant design takes on two fundamental goals: to prevent the occurrence of fire and to protect the initially uninvolved piping and equipment long enough for operations personnel to perform their duties and for emergency responders to get the fire under control. While it is impractical to completely eliminate the potential risk of an accidental fire in a complex process-plant facility that is expected to handle and process hazardous chemicals, it is reasonable to assume that certain aspects of design can be incorporated to reduce that risk....
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/piping_and_tubing/Piping-Design-for-Hazardous-Fluid-Service_5721.html
June 1, 2010

Containing fugitive emissions of volatile organic compounds (VOCs) and hazardous air pollutants (HAPs) is a challenge to the chemical process industries (CPI). It has been estimated that these industries account for half of all fugitive emissions, and 60% of these emissions are the result of valve stem leaks. In addition to environmental benefits, effectively containing these emissions can yield significant operational and economic benefits and avoid punitive penalties for non-compliance with regulatory standards. If cap-and-trade or carbon-tax programs become law, then reducing emissions below mandated levels could yield carbon credits or reduced tax liabilities. Overall, emission reduction improves operating efficiency and creates a safer, more productive workplace.

This article describes how to effectively seal valve stems, including leak detection and repair (LDAR); various types of sealing solutions, their advantages and limitations; performance standards and testing; and proper installation.

...

http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/seals_gaskets_and_packing_materials/Containing-Fugitive-Emissions_5718.html
June 1, 2010
Despite the prevalence of pressure vessels in the chemical process industries (CPI), a clear understanding of the basis-of-design responsibilities involved in designing, fabricating and repairing such a device remains elusive. Vessel users are responsible for providing all necessary data to ensure the manufacturer can design and fabricate a pressure vessel in full compliance with the ASME Pressure Vessel code....
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/tanks_and_vessels/Decoding-Pressure-Vessel-Design_5726.html
May 1, 2010
Steam reforming of natural gas at petroleum refining facilities is the predominant means of producing hydrogen in the chemical process industries (CPI). Because hydrogen needs within various sectors of the CPI are at their highest levels in history, and are continuing to grow, an understanding of this method of hydrogen production and purification can be useful...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/Hydrogen-Production-By-Steam-Reforming_5640.html
May 1, 2010
This self-priming pump is available for water and wastewater processing, This discharge pump ensures continuous flow of highly viscous fluids, These surface pumps boast low maintenance and high reliability, and more.......
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/Focus-on-Pumps_5633.html
April 1, 2010
Mechanical seals play a pivotal role in the chemical process industries (CPI). Correct measurement of the machinery for replacement seals can be an underappreciated aspect of maintenance planning. This one-page reference outlines the basic procedures and considerations involved in measuring machinery for replacement seals...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/Measurement-guide-for-replacement-seals_5567.html
April 1, 2010
The stirred tank reactor with rotating mixers remains the backbone of the chemical process industries (CPI). While mixing is considered a mature technology, it is clear that continued technological development is necessary to achieve the state-of-the-art design demanded by ever-increasing efficiency needs. As worldwide competition forces the CPI to increase the profitability of their production plants, it is even more important for process developers and plant design engineers to understand the mechanical design aspects of agitated reactors. Process design is often an interactive procedure of chemical and thermodynamic requirements on the one hand, and plant or mechanical restrictions on the other. Chemical and mechanical engineers work together to reach the common goal of optimum reactor design. And, this knowledge is also important for plant operators and maintenance engineers. Often there is a need to boost the plant capacity and process efficiency by revamps and modifications of the reactors. Only an awareness of the mechanical conditions in the existing reactor will prevent expensive failures....
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/mixing/Mechanical-Design-Aspects-for-High-Performance-Agitated-Reactors_5572.html
March 1, 2010
Steam tracer lines are designed to maintain the fluid in a primary pipe at a designated uniform temperature. In most cases, these tracer lines are used outdoors, which makes ambient...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/steam_traps/Steam-Tracer-Lines-and-Traps_5489.html
February 1, 2010
This article describes an algorithm that end users can use to develop a program on a personal computer to assess the technical and economic feasibility of installing a variable frequency drive (VFD) on centrifugal pumps. This simple algorithm serves a variety of useful functions....
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/Variable-frequency-drives-An-Algorithm-for-Selecting-VFDs-for-Centrifugal-Pumps_5445.html
February 1, 2010
Find design files quickly with this search software, a centrifugal pump available in many size combinations, more exhibited products......
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/Pump-Users-Symposium-2010_5451.html
February 1, 2010
Results of 12-mo immersion tests in biodiesel and bioethanol of a range of elastomer polymers typically used in fuel-handling equipment show that the seals are prone to significant...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/seals_gaskets_and_packing_materials/Seal-selection-for-handling-and-storage-of-biofuels_5439.html
February 1, 2010
For valves operating in hazardous environments, certification testing is critical to ensure the reliability and safety of the equipment. But this testing process has historically required facilities to shut down and sacrifice valuable production hours to check each valve. Built-in self-test (BIST) capabilities in smart, electronic valve actuators were developed in response to these testing challenges. This article examines how BIST simplifies valve testing and reduces the cost, while increasing the level of confidence in valve and actuator safety....
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/valves/The-BIST-In-Electronic-Valve-Actuators_5459.html
February 1, 2010
Uniformly blend batches with this inline mixer; Quicklyu change mount configurations with this modular system; and more...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/mixing/Focus-on-Mixing_5443.html
January 1, 2010
Pipe sizing calculations include certain values that are time dependent, such as costs. While some costs rise, others decrease over time. It is the designers task to ensure that the total cost is minimized. For fluid flow calculations,heuristic criteria are often used, which is the main reason why these values must be updated from time to time. In this article, recommended velocities are updated for several materials of construction, and other velocities for new materials are calculated, using the Generaux Equation [1],...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/piping_and_tubing/Updating-the-Rules-For-Pipe-Sizing_5402.html
December 4, 2009
Kaeser Compressors Vacuum systems in the Com-pak Plus blower series (photo) are positive displacement, tri-lobe blower packages that provide consistent, reliable vacuum. They feature...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/fans_and_blowers/Vacuum-systems-for-areas-with-noise-or-space-constaints_5346.html
December 4, 2009
Parker Hannifin Tex-Flex fluorinated ethylene propylene (FEP) corrugated tubing (photo) can turn sharp corners without kinking. The manufacturer asserts that the tubing can handle bend...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/piping_and_tubing/Avoid-kinking-on-tight-turns-with-this-tubing_5332.html
December 4, 2009
The skirts on the new CE Series pipe caps are designed to stretch over the pipe edges while retaining their shape and tight fit...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/piping_and_tubing/These-pipe-caps-can-be-installed-without-tools_5347.html
December 4, 2009
The SCP-6500 (available March 1, 2010) is designed to accommodate the transfer of alcohols, volatile hydrocarbons and flammable solvents. The pump features a lug with a grounding wire...
http://www.che.com/processing_and_handling/liquid_gas_and_air_handling/pumps/Transfer-flammable-liquids-safely-with-this-pump_5344.html
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Check the Chemical Engineering Bookstore for Resources on:
  • Environmental Management: Air-Pollution Control
  • Environmental Management: Wastewater and Groundwater Treatment
  • Fluid Handling
  • Gas-Solid and Liquid-Solid Separation
  • Mixers and Mixing
  • Chemical Engineering 2009 Buyers' Guide
  • Plus the Chemical Engineering 2009 Buyer's Guide and more

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