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Actuators Blog
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mark.nymeyer
10 Aug 2018
Article info: LNG Industry, Aug 2018, Optimizing Performance
The efficiency and availability of a plant’s compressors have a direct impact on the profitability of a liquified natural gas (LNG) facility. Downtime can affect the plant’s mixed refrigerant loops and lead to reduced LNG production, along with substantial contractual penalties. One cause of unexpected downtime is often poorly performing anti-surge valves. Joe DeMonte, Global Midstream Oil & Gas/LNG Industry...
mark.nymeyer
10 Aug 2018
Article: Control Engineering Europe, Jun 2018, Butterfly Valves Take Control
Subject: Butterfly valves are lighter, smaller and weigh less than other kinds of control valves—making them the best choice for regulating flow in many applications. This article looks at the advantages and limitations of high performance butterfly valves, and then describes developments making them more suitable for flow control. Standard butterfly valves have traditionally been used for automated on/off applications...
Jim Cahill
9 Jul 2018
Components in a Butterfly Valve
The team managing education services for the Fisher brand of valves and instrumentation has a lot of really good videos on valve basics. You’ll find these on Emerson’s Fisher Valves & Instruments YouTube channel. For example, a recently posted video, What are the Components of a Butterfly Valve? , provides an under 2-minute look at what makes up a butterfly valve and differences in types of valve. It opens describing...
Jim Cahill
15 Jun 2018
How to Setup Keystone Actuator Mechanical Limits
As part of Emerson’s acquisition of the Pentair Valves and Controls business , the Keystone brand of valves and actuators joined the final control area of Emerson Automation Solutions. Over on the Bettis YouTube channel, is a great series of videos in setting up Keystone EPI2 electric actuators . I’ll recap a few points made in the first video, Keystone EPI2 Setup & Commissioning Video 1 Setting Mechanical Limits...
Jim Cahill
4 May 2018
Improving Pressure Relief Valve Fugitive Emissions
In an earlier post, Creating Pressure Relief Valve Fugitive Emissions Testing , we described the advancement of this effect to create standards in this area. I joined Emerson’s Dr. Amr Gado and Calvin Deng as they presented this work in an Offshore Technology Conference (OTC) technical track, Striving Toward Safety Excellence in Offshore and Subsea Environments . Manufacturers and producers are seeking ways to...
Jim Cahill
3 May 2018
Filling Gaps in Global Safety Standards
A safety instrumented function (SIF)’s purpose is to reduce the risk of a specific hazard. For example, an upset condition in an oil and gas production separator may cause a series of SIFs within a safety instrumented system (SIS) to shut in the wells feeding the separator. A SIF contains a sensor, logic solver and final control element—often an emergency shutdown valve. As a mechanical component of this safety loop...
Jim Cahill
30 Apr 2018
Valves for Frequent Cycling, High Pressures and Temperatures
David Leavitt described an application of high-cycling valves in a dehydration process at the Offshore Technology Conference (OTC) in Houston, Texas. I recapped his presentation last week in a post, Triple Offset Valves and Molecular Sieve Adsorption Applications . He compared rising stem ball valves and triple offset valves (TOVs) used in these applications. David describe a concentric butterfly valve design, a dual...
Jim Cahill
25 Apr 2018
Triple Offset Valves and Molecular Sieve Adsorption Applications
Adsorption , different from absorption, is the process of the: … adhesion of atoms , ions or molecules from a gas, liquid or dissolved solid to a surface . [1] In process manufacturing operations, adsorption is sometimes used in dehydration or purification processes. In the oil & gas industry, this method is used to dehydrate and remove contaminants from natural gas. At next week’s 2018 Offshore Technology...
Jim Cahill
24 Apr 2018
Simplifying Oil and Gas Production Site Installations and Operations
Consider the flow path of oil & gas production from the well head. The first stop is typically the production separator where the oil, gas, condensation, water, brine and other fluids and sediment get separated. Traditionally, for multi-well sites, there is a test separator so that each well’s production composition can be assessed. In this arrangement the wells are connect to both a test and production manifold,...
mark.nymeyer
17 Apr 2018
Wellsite Valve Manifolds Simplified —By Joseph Zawacki
: Connecting multiple production wells or flowlines to a test separator normally requires multiple valves, each of which has to be opened by hand to connect each well in turn. In addition to valves and shutoff devices, such a system requires considerable piping. A multiport flow selector (MPFS)—with automatically actuated control—is safer, less expensive, lighter weight and more compact than conventional systems. The...
mark.nymeyer
17 Apr 2018
Analyzing Vibration in and Around Control Valves—By Shawn Anderson and Adin Mann
Excessive vibration can cause damage to a control valve, measurement equipment and the piping system. It’s often difficult to find the source of the vibration, which can originate not only with the control valve, but also with upstream and downstream piping and equipment. This article discusses modern techniques to help monitor, predict and solve problems caused by vibration. Solving valve vibration problems is difficult...
Jim Cahill
12 Apr 2018
Solving Control Valve Vibration Challenges
The production areas of many process manufacturing facilities can sometimes seem deafening. Some of this noise may be attributed to excessive vibration surround equipment such as control valves, piping and instrumentation. Emerson’s Adin Mann and Shawn Anderson have written a great Flow Control article, Analyzing Vibration in and Around Control Valves to look at the causes and remedies for excessive vibration. Many...
Jim Cahill
2 Apr 2018
Isolation Knife Gate Valve for Medium-Slurry Mining and Minerals Applications
Many manufacturing processes have challenging fluids flowing through their pipes and vessels. Mining and minerals have some of the most challenging with abrasive and corrosive solids in the flowing fluids. In a Valve magazine article, Challenges of Medium Density Slurry Service in Mining and Mineral Processing , Emerson’s Mike Gordon describes innovations in knife gate valve technology to address these slurries. ...
Jim Cahill
2 Apr 2018
Isolation Knife Gate Valve for Medium-Slurry Mining and Minerals Applications
Many manufacturing processes have challenging fluids flowing through their pipes and vessels. Mining and minerals have some of the most challenging with abrasive and corrosive solids in the flowing fluids. In a Valve magazine article, Challenges of Medium Density Slurry Service in Mining and Mineral Processing , Emerson’s Mike Gordon describes innovations in knife gate valve technology to address these slurries. ...
mark.nymeyer
16 Mar 2018
Valve World Feb 2018, Dangers of Non-OEM Valve Parts, by Karl Lanes
Although an inexpensive, replicated part may look the same as an original part and may fit into the valve being repaired, it does not meet the original valve manufacturer’s design specifications. This article describes the problems with non-OEM parts, and explains why parts from the original valve manufacturer are far superior. Non-OEMs supply valve parts to the process industry at prices up to 30 to 40 percent less...
mark.nymeyer
14 Mar 2018
Eliminating Troublesome Tubing
This article describes how valve actuator instrument tubing can be subject to abuse and damage from vibration and environmental extremes, and shows how Fisher actuators solve these types of problems. Valve actuator instrument tubing is often subject to abuse. It can be damaged by rough handling during shipping or transport. Workers tend to lean ladders against it, stand on it, pick up valves by grabbing onto the tubing...
Jim Cahill
14 Feb 2018
Control Valves and IIoT
At the 2018 ARC Industry Forum, ARC Advisory Group’s Ralph Rio led a session, How OEMs improve Customer Satisfaction and Revenue with IIoT. The description for the session was: Using IIoT to monitor the equipment allows the OEM to identify an issue at their customer’s site before it affects the end user. Condition monitoring helps prevent unplanned downtime and improve asset performance. Mitigating the problem before...
Jim Cahill
14 Feb 2018
Control Valves and IIoT
At the 2018 ARC Industry Forum, ARC Advisory Group’s Ralph Rio led a session, How OEMs improve Customer Satisfaction and Revenue with IIoT. The description for the session was: Using IIoT to monitor the equipment allows the OEM to identify an issue at their customer’s site before it affects the end user. Condition monitoring helps prevent unplanned downtime and improve asset performance. Mitigating the problem before...
Jim Cahill
6 Feb 2018
Saving Project Timelines and Costs by Avoiding Control Valve Over-specification
Control valves are a critical part of process manufacturing processes and require great care in selection and specification. But what if the specifications are too stringent impacting both cost and lead times? The costs and delays can have an impact on the overall performance of a capital project. In a Processing magazine article, How To Avoid Over-Specifying Control Valves , Emerson’s Janelle Prusha shares valuable...
Jim Cahill
1 Feb 2018
Planning and Tools for Successful Shutdowns, Turnarounds and Outages
No matter what you call them—shutdowns, turnarounds & outages (STO)—they are a time that manufacturers and producers must race the clock to repair and restore their production equipment to minimize financial losses from lost production. Valves are some of the critical assets that need to be checked and serviced. They touch the process directly and face the wear and tear caused by the fluids flowing through them over...
Jim Cahill
16 Jan 2018
IIoT in Steps for Monitoring Valve Health
Manufacturers and producers can improve safety, reliability and efficiency by applying additional sensors, analytics and experts. Difficulties in installation have held back these improvements, but the Industrial Internet of Things (IIoT) technologies have significantly reduced these barriers. One example of IIoT in action is featured in a Valve magazine article, Monitoring Valve Health via the Internet . Emerson...
mark.nymeyer
10 Jan 2018
Are your Control Valves Gold Plated? How to Avoid Over-Specifying Control Valves
This article describes issues often seen when reviewing end user technical specifications, and shows how process engineers can specify just what they need – and no more – when ordering valves, actuators, positioners and related accessories.
Jim Cahill
5 Jan 2018
Tank Blanketing Pressure Regulation Calculations
In an earlier post, Sizing Tank Blanketing Regulators , we described changes in the API Standard 2000 – Venting Atmosphere and Low-Pressure Storage Tanks with the release of the 7 th edition. Emerson’s Steve Attri highlighted the changes from the prior versions of the standard and how these changes affected the sizing requirements of tank blanketing pressure regulators. I received an email with some questions about...
Jim Cahill
2 Jan 2018
Low-Bleed or Standard Relays for Control Valves?
Happy New Year everyone! I hope your holidays helped to recharge your batteries and get you off to a great start for 2018. I saw this exchange in my email over the holidays about the effects of using low-bleed relays with Fisher DVC6200 digital valve controllers for control applications as compared to standard relays. This question was in response to a blog post from many years ago, Positioner Pneumatic Pressure Bleed...
Jim Cahill
18 Dec 2017
Control Valve Noise-Induced Vibration Solution
A presentation from this past October’s Emerson Exchange conference on control valve vibration problems was recently published by ControlGlobal.com. The article, Ethanol plant learns why pipe cracks , describes the problem-solving path to address this situation. Emerson’s Shawn Anderson and Adin Mann joined in an ethanol energy producer’s presentation to share the story of how the teamed with the plant staff to determine...
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