March 2019

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Feature Report
Facts at Your Fingertips
Technology Profile
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Game Changers
The technologies associated with the Industrial Internet of Things, and…

COVER STORY

Non-Destructive Testing: Managing Corrosion Under Insulation
Corrosion under insulation (CUI) creates a pervasive and versatile challenge…

Using Corrosion as a Process Variable
Monitoring and analyzing historical corrosion data can provide insights not…

IN THE NEWSNEWSFRONTS

Flow Monitoring for Today's Chemical Processes
New technologies provide diagnostics and calibration verification to improve maintenance…

Chemical Recycling Makes Waste Plastic a Resource
With an eye toward a circular economy, technology developers are…

CHEMENTATOR + Show More

Accelerated electrons unlock sugars from cellulosic biomass
Obtaining sugars from cellulosic biomass cost-effectively is difficult because the…

Selective oxidation of methane makes formaldehyde, without generating CO2
Researchers from South Korea have discovered a high-performance catalyst for…

Chementator Briefs
ANG fueling station Ingevity (North Charleston, S.C.; www.ingevity.com) has completed…

Process intensification for carbon capture could reduce costs
In conventional solvent-based carbon-capture systems, CO2-rich exhaust gas contacts gravity-driven…

Mechanical CO2 sequestration improves algae production
A new, mechanical method for sequestration of carbon dioxide into…

A single process to handle hydraulic fracturing produced water and offgases
Two major concerns in hydraulic fracturing operations are finding efficient…

New membranes resist biofouling using sunlight
Membranes in large-scale water-treatment processes are often fouled by accumulation…

Gas analysis made easier for high-dust areas
A collaboration between Servomex (Surrey, U.K.; www.servomex.com) and FLO2R (Hadsund,…

A new, more comprehensive electronegativity scale
The electronegativity of atoms is one of the most well-known…

BUSINESS NEWS

Plant Watch: March 2019
Plant Watch Sasol begins operating LLDPE unit at Lake Charles…

TECHNICAL & PRACTICALFEATURE REPORT

Unified Operational Environment Improves Process Safety
A unified gateway station and related components increase availability to…

The Value of Safety Instrumented Systems
A safety instrumented system (SIS) is important to ensure the…

FACTS AT YOUR FINGERTIPS

Facts at your Fingertips: Hygienic Process Equipment Fabrication
In hygienic process operations, proper system construction and fabrication has…

TECHNOLOGY PROFILE

Technology Profile: Calcium Carbide Production from Limestone
This column is based on “Calcium Carbide Production from Limestone…

SOLIDS PROCESSING

Design and Calculation Methods for Uniflow Cyclones
Uniflow cyclones can be effective solid-gas separation equipment when space…

EQUIPMENT & SERVICESFOCUS

Focus on Air Pollution Control
These ceramic filters have catalysts built-in The BisCat filter system…

NEW PRODUCTS + Show More

Spraying and drying systems improve pharma R&D
At Interphex, these companies will showcase a wide range of…

Monitor CFATS compliance with this new software module
This company’s Compliance Manager software module aids chemical processors in…

These compressors are designed to reduce energy use
The new SM 7.5, SM 10, SM 15, and SFC…

Simplify screen changing for separator systems
The Electro-Lift system (photo) assists in expediting change times for…

A three-in-one biogas-measurement device
The MGP261 (photo) is said to be the world’s first…

This new heat exchanger makes use of exhaust gases
The new Exhaust Gas Heat Exchanger (EGHE; photo) transfers heat…

These versatile wastewater samplers are portable
The AQUA Series of portable wastewater samplers (photo) consists of…

This mixer is designed for hot melts and viscous dispersions
The Model CDA-800 multi-shaft mixer (photo) has a special triple-shaft…

Use this mobile app to optimize penetration-seal selection
This company has launched a new mobile application (app) to…

SHOW PREVIEWS

Show Preview-Interphex 2019
Interphex 2019 will take place April 2–4 at the Jacob…

Show Preview-Powtech 2019
Powtech 2019 (www.powtech.de) takes place from April 9–11 at the…

Highlights Non-Destructive Testing: Managing Corrosion Under Insulation Chemical Engineering Bookshelf: CPI Booklist for March 2019 Facts at your Fingertips: Hygienic Process Equipment Fabrication The 2019 Kirkpatrick Award: Nominations are now open The Value of Safety Instrumented Systems

Comment PDF Automation & Control

Feature Report: Part 1: Using Installed Gain to Improve Valve Selection

By Melissa Niesen, Emerson Process Management | October 15, 2008

The perfect valve to control your process has been selected. The valve will pass your maximum flow. Everything is great, right? In some cases digging a little deeper might help. The control valve usually should not be the most restrictive element of the process, but it also should not be oversized or have performance issues that do not mesh well with the process characteristics. Typically when a valve is selected, attention is paid to whether the valve is the correct size by determining the travel of the valve (openness) at several operating points. Often these are labeled minimum, normal and maximum. From these conditions, suitability can be judged by seeing that certain rules of thumb are followed. For example Click here for full pdf version of this article – includes all graphs, charts, tables, and author information

Reduce Explosion Risk in 2 Seconds with In Situ Oxygen Analysis

Changing to GPro® 500 in situ TDL sensors has reduced measurement time from 20 seconds to 2, and almost eliminated analyzer maintenance.

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Reduce Explosion Risk in 2 Seconds with In Situ Oxygen Analysis

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