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

Displaying 61 - 80 of 817 stories.
August 1, 2013
The scaleup of liquid mixing systems does not have to be a mystery. The principles are quite well understood, although knowing which principles apply is not always obvious. Follow this guidance to improve operation. 1. Liquid mixing scaleup. Liquid mixing is the most common use of scaleup methods in chemical engineering. The concept of scaleup is to take small-scale results and predict results in...
July 1, 2013
Launched in May, the new semi-hermetic, six-cylinder GEA Block piston compressor HG46 CO2 T has a displacement of 21.8 to 30.3 m3/h. It is said to be the biggest semi-hermetic compressor...
July 1, 2013
The new ASM 340 (photo) is a high-performance and durable leak detector for a wide range of applications, from R&D through the industrial coatings market, and can be used for both serial production and maintenance tasks. Both...
July 1, 2013
Polymer-based piping systems offer a number of advantages, along with some limitations, compared to metallic and other non-polymeric pipe materials. The use of thermoplastic piping in the chemical process industries (CPI) must be carefully considered on a case-by-case basis because of the constraints introduced by various CPI applications. Polymers remain only a small (~10%) part of the global CPI piping...
July 1, 2013
The new Food Grade range of pipework systems is said to be the first product range on the market that meets the stringent requirements of the European standard EC 1935/2004, as well as the U.S. Food and Drug Admin. (FDA) food...
July 1, 2013
The new two-stage DuoLine rotary-vane vacuum pumps feature a newly developed pump system with optimized cooling. These changes have a significant impact on the pump’s service life, says the...
July 1, 2013
The ViscoFlux mobile drum-emptying system has been further developed and now has an optional control unit enabling integration into a range of filling processes. For example, an end position cutoff can be integrated into the ViscoFlex so that the pumping process is automatically stopped...
July 1, 2013
This company’s E-Series Plastic AODD (air-operated double-diaphragm) pumps have been upgraded with electrically conductive polytetrafluoroethylene (PTFE) diaphragms (photo) to...
July 1, 2013
The HydroWhirl Poseidon range of PTFE tank cleaners (photo) has recently been enhanced with additional models and flowrates, as well as improvements in the overall design. The PTFE material of construction ensures that the...
July 1, 2013
A new range of compact, lightweight motorized valves has been introduced for applications where electric actuation is required. The valves are quiet in use, and can be operated by a 24-V d.c. power...
July 1, 2013
Rotary valves are used almost universally in pneumatic conveying systems. They serve three main functions: 1) to provide a pressure-seal (airlock) between two adjacent processes, 2) to provide solids metering (feeding) and 3) to provide a combination of solids metering and a pressure-seal for feeding solids into a pneumatic conveying system. Rotary valves are common devices for feeding solids into a...
June 1, 2013
Ongoing advances in the design and use of dry gas seals (DGSs; [ 1]) — as an alternative to traditional oil-lubricated wet seals [ 2] — have helped to improve the reliability and efficiency of compressors throughout the chemical process industries (CPI). One of the major design considerations in mechanical seals is how to protect seal faces from wear, as one face rotates close to a static face...
June 1, 2013
Calculating the volume of a liquid in a vessel of a complex shape is a common task for chemical engineers. However, there are several difficulties associated with accurately carrying out this calculation. In my own experience as a chemical engineer, I have become familiar with the complexities of calculations related to determining the volume of a liquid contained in a vessel with an irregular shape...
May 1, 2013
A variety of technologies, methods and best practices are available to obtain the lowest total cost of ownership for compressors used in plants throughout the chemical process industries (CPI). This article discusses several critical areas in which concerted effort can help to reduce the overall cost of ownership.    Specifying compressors The ability to carry out proper shop-based performance...
May 1, 2013
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...
May 1, 2013
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...
May 1, 2013
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...
May 1, 2013
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...
May 1, 2013
Minimizing process variability is an important component of a plant’s profitability. The performance of control valves within process control loops has a significant impact on maintaining consistent processes. This refresher outlines some of the important aspects of control-valve performance, including parameters of both the static response and the dynamic response. Static response A valve’s...
May 1, 2013
For 40 years, this company has developed and manufactured bellows-sealed globe valves (photo) for hazardous applications in the chemical, petrochemical and nuclear industries. The...
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