Activity
    • 21 Dec 2016

    Controlling Liquid Pipeline Surge Pressure

    The RBN Energy blog is a must read for those in the oil & gas upstream, midstream and downstream industries as they analyze the trends and global dynamics impacting companies. Posts such as The Flows They Are A-Changin’ – Westward Natural Gas Flows Into Texas On The Rise describe the flow reversals in natural gas in the U.S. as LNG plants are built along the Gulf coast and vast amounts of shale gas are produced in the...
    • 26 Oct 2016

    Selecting the Right Valve

    At the Emerson Exchange conference in Austin, Emerson’s Tony Foster and Leah Stanley and Vinson Supply’s Robert Lange presented, Selecting the Right Valve for Your Application to Reduce Cost and Increase Performance. Their abstract: Selecting the optimum valve for the application can sometimes be a daunting task, even with a “simple” on/off valve, especially when the process operates at high or low temperatures and...
    • 25 Oct 2016

    Mitigating Cavitation and Outgassing Control Valve Damage

    At the Emerson Exchange conference in Austin, Emerson’s Jonathan Vance presented Outgassing and Cavitation: Not So Good Vibrations. Here’s the abstract: Outgassing and cavitation are two of the most common issues associated with control valves. Both phenomena often occur in high pressure drop applications and result in excessive vibration; however, the solutions to combat these critical applications vary greatly....
    • 4 Oct 2016

    Safety Shutdown Valve Local Control Panel

    For process manufacturers and producers with safety shutdown applications, local control panels are often installed to provide visibility and control actions to operators locally out in the process area. Actions can be taken at these panels to initiate an emergency shutdown. I caught up with Emerson’s Riyaz Ali about how these local control panels work with safety shutdown valves (SSVs) and the digital valve controllers...
    • 26 Aug 2016

    Testing Valves in Safety Instrumented Functions

    Safety instrumented systems are a critical part of process manufacturers and producers overall process safety management in protecting personnel, environment, equipment, property, reputation and image. In an Offshore Engineer article, Safety Instrumented Function loop ‘final element’ problems and solutions , Emerson’s Riyaz Ali describes the importance and ways to test the final control elements in these safety loops...
    • 28 Jul 2016

    Stay on Top of Your Tanks

    For storage tanks, controlling emissions is a high priority concern. A pressure vacuum relief valve (PVRV) is a critical component in managing pressure. Knowing when and for how long it opens to release pressure also helps to determine what emissions occurred. In this quick 1:52 video, PVRV with Smart Wireless Technology , Emerson’s Steve Attri , explains how wireless technology can help determine if the PVRV is...
    • 27 Jul 2016

    Adsorption Process to Separate Fluid Components

    Many techniques are used to separate impurities in fluids. One common method is to use the process of adsorption. In an online document, Control Valve Sourcebook — Chemical Unit Operations , adsorption is defined as: …a typical mass transfer operation used in process plants to remove or separate specific components of a liquid or gaseous mixture. The specific definition of adsorption is the adhesion of atoms, ions...
    • 13 Jul 2016

    How to Disassemble a Daniel Digital Control Valve

    Let’s continue our series of practical “ How-to videos ” with a closer look at disassembling a Daniel V788 digital control valve . The valves are used effectively in loading and offloading applications that require precise flow rate control and batch delivery of fluid products. In this 7:36 video , Emerson’s Jerome Lopez demonstrates the disassembly process that may be done during service repair, refurbishing or preventive...
    • 11 Jul 2016

    Monitoring Storage Tank Emergency Vents

    You will find low-pressure storage tanks in many industries including oil and gas, chemical, petrochemical, pharmaceutical, and food and beverage. Emergency vents have traditionally been used as the last line of defense in overpressure situations. In a new whitepaper, Benefits of Wireless Monitoring of Storage Tank Emergency Vents , Emerson’s Steve Attri describes how the ability to monitor pressure release conditions...
    • 7 Jul 2016

    Surge Relief for Oil and Gas Liquids Pipelines

    Authors: Rossella Mimmi and Dave Seiler Petroleum commodity releases can have serious consequences, so ensuring pipeline integrity is crucial for operators. Pipeline integrity is not just about preventing incidents, but is a holistic approach to the prevention, detection, and mitigation of these undesired commodity release such as surge. In this two-part series, we will provide background information on surge relief...
    • 27 Jun 2016

    Sizing Control Valves for Outgassing Applications

    Ardent Photography . Some rights reserved. (CC BY-ND 2.0) Think about what occurs when you open a bottle of champagne. Immediately the pressure inside the bottle drops to atmospheric pressure. This is below the pressure that allows the dissolved carbon dioxide to remain in solution, thus the CO2 gas is released. This sudden release of the dissolved gas is referred to as “Outgassing.” You may have also noticed the rapid...
    • 26 May 2016

    Reducing Valve-Induced Unplanned Downtime

    Valves are the critical components in any process manufacturing and production operation that touches what is being produced. As such, they are subject to wear and tear. An ARC View report, Leveraging IIoT Technologies to Reduce Valve-Related Unplanned Downtime highlights key points from a presentation by Emerson’s Shawn Anderson at the ARC Advisory Group’s 20 th Annual Industry Forum. Here is the recap of the...
    • 29 Apr 2016

    Simplifying Pneumatic Valve Installation, Commissioning and Operation

    For many applications in the process manufacturing and production industries, solenoid valves are used to “shut off, release, dose, distribute or mix fluids.” Wikipedia defines a solenoid valve as: …an electromechanically operated valve . The valve is controlled by an electric current through a solenoid : in the case of a two-port valve the flow is switched on or off; in the case of a three-port valve, the outflow...
    • 26 Apr 2016

    Remotely Monitoring Storage Tank Pressure and Vacuum Relief Valves

    In current times where oil supply exceeds demand, storage tanks are filling. A recent Reuters article, Oil glut up close: How Cushing copes with full crude tanks notes: There may be no better place to witness what a world awash in crude looks like, and the 9 square-mile (23.3 square km)complex seems to bear out oil traders’ fears that the industry is running out of space to contain a historic supply glut that has...
    • 16 Mar 2016

    Pressure Regulators in Upstream Oil and Gas Processing Applications

    Managing pressures are a large part of the control strategies for upstream oil and gas applications. These pressures include those in the main processing lines, fuel lines and vapor spaces found in storage tanks. Emerson’s Thomas Weyer shared a new pressure regulator upstream oil and gas application map with me. It was designed to show the options of pressure regulators upstream and downstream of the equipment...
    • 15 Feb 2016

    Setting Up and Calibrating Valve Positioners

    Short videos are great ways to show how to perform an activity, such as calibrating a valve’s actuator to move the valve stem based on the 4-20mA signal it receives from the control system. In this under 5-minute “how-to” video , Emerson’s Alex Quah Shu Min demonstrates the setup and calibration procedure for the Fisher 3582i electro-pneumatic, single-acting positioner on a Fisher 667 Size 30 reverse-acting actuator...
    • 10 Feb 2016

    Value from Monitoring Control Valves

    As staff in process manufacturing and production facilities shrink due to economic or demographic conditions, on-site engineers, operations and maintenance personnel must increase their breadth of skills at the expense of skill depth. In a recent post, Monitoring Control Valves with Remote Expertise , we described how remote expertise could help augment local staff in the area of valve monitoring and maintenance. ...
    • 9 Feb 2016

    Online Pressure Regulator CAD Drawing Resource

    For process manufacturers and producers, regulating pressure throughout the process is important for safety, efficiency and reliability. We’ve highlighted the important role of pressure regulators in numerous posts . During the front end engineering design phase of a project, having good CAD ( computer-aided design ) drawings are important in determining the best regulator for the application given piping configurations...
    • 2 Feb 2016

    Monitoring Control Valves with Remote Expertise

    An ARC Advisory group study highlighted that “The global process industry loses $20 billion, or five percent of annual production, due to unscheduled downtime and poor quality. ARC estimates that almost 80 percent of these losses are preventable…” Key components in controlling a process are the control valves, which directly touch the process. As such, they can be subject to corrosive, erosive and other challenging...
    • 13 Jan 2016

    Control Valve and Control Performance at Instrumentation Symposium

    Instrumentation and automation professionals in the oil & gas industries along the Texas Gulf Coast have an excellent resource in the annual Instrumentation and Automation Symposium for the Process Industry . The 71 st edition of this 3-day symposium will be held January 26-28 at Texas A&M University in College Station, Texas. If you’re going, make sure to attend some of Emerson’s James Beall ‘s presentations and workshops...
    • 10 Dec 2015

    Separate versus Integral Final Element Accessories Questions

    A post from a few years ago, Separate Versus Integral Final Element Accessories in Safety Applications , continues to generate some good questions. I thought I’d make these questions and associated answers more visible in today’s post. Here’s the first question: I understood the whole description, But while calculating PFDavg, We will have to add the Failure rate of valve assembly (Valve+Actuator) which brings...
    • 10 Nov 2015

    Positioner-Only Configuration on Digital Valve Controller

    I wanted to share a quick question and answer in an email exchange in case you may have a similar question sometime down the road. The original question was: The Project is about installing two manual Fisher control valves but we want to modify it to include obtaining feedback positions back to the Control Room. ( ZSC/ZSO ). Can we configure the DVC6200 just for only positioning purposes only? If this is possible...
    • 5 Nov 2015

    Application Guide for Natural Gas Pressure Regulators

    I saw on my LinkedIn home page that my friends who manage Fisher Regulators have released the Natural Gas Technologies Application Guide – Edition VII , which is now available online in eBook format… very nice! This application guide is designed to help you quickly and easily select pressure regulator products for natural gas applications in transmission, distribution and utilization. If you don’t have great familiarity...
    • 3 Nov 2015

    When is a Safety Integrity Level Rating of a Valve Required?

    Control valves play a large role in process control. Emerson’s Riyaz Ali shared with me that he is often asked about their use in safety instrumented functions (also known as safety loops). When asked recently, he shared an ISA Safety Division newsletter from the fall of 2007. Unfortunately, I couldn’t find the newsletter in my Google searches. His article in this newsletter, When is a Safety Integrity Level (SIL)...
    • 14 Oct 2015

    Vibration Monitoring of Control Valves Prevents Unplanned Shutdowns

    Emerson’s Shawn Anderson teamed with a recycled paper mill staff member and their local business partner on an Emerson Exchange presentation, Vibration Monitoring of Control Valves Prevents Unplanned Shutdowns. Here is the presentation abstract: Two control valves in this recycled cardboard paper facility had experienced vibration related failures. These failures were difficult to detect and/or predict due to the...