on Tue, 08/11/2020
Most people who are familiar with control valves have seen the formula for calculating the valve capacity (Cv) required to pass a given flow rate of water. This seems fairly straightforward until you ask yourself, what is the correct value of differential pressure to use?
on Tue, 08/11/2020
In terms of what matters to most in the field today, it is safe to assume that reliability, flexibility, accuracy and cost are at the top of the list. With these factors in mind, implementing a silicon-controlled rectifier (SCR) control system for an electric heater is often an optimal approach.
on Tue, 03/17/2020
There are several different processes that require a product to flow through a pipe from one piece of equipment to another. A certain level of heat is often required for this process piping, and this heat must be at very high levels for many applications.
on Wed, 03/04/2020
Proper filtration is essential to process flow operation. Improper filtration or lack of filtration can wreak havoc on components, reducing their life and changing the final product. If left unaddressed, this can lead to equipment failure, process upsets, increased quality issues and in some cases, unplanned shutdown. Thus, making an investment in the correct filter for the process is a wise choice.
on Wed, 02/12/2020
Achieving effective catalyst regeneration requires a process that produces a very high level of heat in a very efficient manner. Over the years, there have been several different approaches to create this required heat. Traditional steam has been a popular choice as well as heated transfer media. However, these methods have limitations.
on Wed, 12/18/2019
The devastating effects cavitation can have on control valve internals is widely appreciated. In this article, the authors therefore explain the origins of cavitation, provide an easyto-use method to estimate cavitation sound levels and conclude with approaches to reduce or even avoid cavitation.
on Wed, 11/20/2019
Laying out an effective heat tracing design requires careful attention to detail. Every aspect of the system must be meticulously considered, including both the temperature requirements of the fluids being protected as well as the physical characteristics of the equipment being heat traced.
on Mon, 11/18/2019
In the world of instrumentation, there are a number of different topics discussed and analyzed. However, one that should not be overlooked is that of instrumentation fittings. Do you know what technologies are available? Do you know the strengths and /weaknesses? Are there any new trends?
on Tue, 06/18/2019
Premature heater failures can lead to unexpected process downtime. Tactics such as testing, planned replacement programs and preventing moisture ingress can help prevent premature heater failures.
on Mon, 04/22/2019
A plant operator’s biggest fear is an unplanned shutdown. The process can place a heavy amount of stress on both operations and maintenance personnel. Alternatively, taking full advantage of a planned shutdown or turnaround is critical.
on Wed, 03/06/2019
Developing a strong preventative maintenance plan for plant shutdowns and turnarounds is the best way for operators to minimize the risk of equipment failure, which can lead to unnecessary shutdowns and ultimately, higher costs.
on Sun, 01/20/2019
Specifying control valves and engineering a system in which the flow of a particular product is completely optimized for superior performance and yield can be a challenging process. A number of factors must be considered during this practice, not the least of which is trying to prevent any system or process-destroying problems that may arise.
on Mon, 12/17/2018
Many engineers may wonder if it is possible to have flashing liquid flow in a control valve even if flow is not choked. The short answer is yes, but it is not very common. This article provides a more detailed answer to this question.
on Wed, 12/12/2018
Within a refinery, four main utilities are considered essential to operations: electricity, natural gas, water and compressed air.
on Wed, 11/21/2018
With the cold months on the precipice, November is a great time to review the actions that plant managers and operators should take to better ensure a winter free from incident.
on Fri, 09/28/2018
I was recently asked how the installed flow characteristic of an equal percentage valve in a system that includes a significant amount of pipe or other pressure-consuming elements “magically” becomes a linear, or approximately linear, installed flow characteristic.
on Mon, 06/18/2018
Thermocouples and controllers themselves do not prevent a failure from occurring. What they can do is create a temperature profile for a heater that can be used as a maintenance log.
on Mon, 06/18/2018
In the last ten years, the design of pneumatic systems has changed dramatically. Pneumatic manufacturers’ online tools for sizing components have evolved, the fieldbus systems are ever-changing, component designs are constantly improving, and network devices such as the Industrial Internet of Things have reshaped the industry.
on Thu, 01/04/2018
Valve sizing and proper application of control valves have always gone hand-in-hand. However, the tools available to valve users have changed and improved significantly over time.
on Tue, 11/21/2017
Despite the demand for standardized communication protocols among manufacturers, both the manufacturers and end users face challenges when it comes to agreeing on a path.
on Wed, 11/01/2017
Proper filtration is one of the most important functions performed inside refineries. Filtration is the removal of contaminants through some type of synthetic, paper, pleated or wound media. The goal of this process is to achieve a specific level of cleanliness.
on Mon, 06/05/2017
Inside of plants today, AC motors are becoming the industry standard. Many plants are shifting to AC motors from hydraulic motors and in some cases DC motors when powering heavy loads, which were more popular in the past. This shift can be attributed to a variety of reasons and most have to do with cost.
on Mon, 04/03/2017
When selecting the pipes and valves to be included in a cooling system, it is important to understand the options available — and the possible outcomes associated with each selection. The selection process is often overlooked or is not given proper attention by designers and contractors. Many factors can impact the effectiveness, longevity and quality of the overall cooling system.
on Fri, 07/01/2016
The Internet of Things (IoT) is a phrase that describes the connectivity between physical objects networked together using an Internet connection. These networks have a wide range of capabilities, mostly centered on collecting or exchanging data. A specialized version of the IoT, referred to as the Industrial Internet of Things (IIoT), enables industrial application engineers to implement new or retrofitted systems with upgraded levels of connectivity that allow more advanced process control.
on Mon, 11/30/2015
Oil and gas engineers face a major problem in accurately and reliably measuring and monitoring the various fluids that are introduced into oil pipelines from well site pumping stations. A thorough understanding of both the oil separation process and the properties of valves and actuators is required to correctly specify a system.
United Electric Controls has introduced a unique new family of HART capable transmitters that provides programmable switching functionality for industrial process monitoring applications. The new One Series 1XTXSW transmitter line is the first to integrate HART 7 compatible 4-20 mA output and two solid-state programmable relays for monitoring temperature or pressure in safety, alarm and emergency shutdown applications.
Workplace safety is—or should be—a primary focus of every organization, regardless of whether we’re talking about a classroom, an office, a manufacturing facility, or an oil rig. Employees deserve a workspace that is as safe and secure as it can possibly be.
on Tue, 07/14/2015
Precise combinations of valves and other equipment lead to process success. A biopolymer fermentation process provides an example of proper valve selection.
on Wed, 06/17/2015
Plant engineers often fail to incorporate correct lubrication into system processes and do not realize its critical importance until something goes wrong.
on Wed, 06/17/2015
This is Part IV in a four-part series based on the contents of the new textbook, “Control Valve Application Technology, Techniques and Considerations for Properly Selecting the Right Control Valve.”
on Tue, 06/09/2015
Cavitation is the 2nd leading cause of a pump system failure. It’s for this reason that a full understanding of what cavitation is, how it is caused and how it can be prevented is critical in the fluid power industry.
on Thu, 05/21/2015
In order to get good control with stability throughout the full range of required flow rates, one must use a control valve that has an installed flow characteristic that is linear, or at least as close to linear as possible in most systems.
on Tue, 04/14/2015
Tasked with increased demand for high power output, many operators in North American sectors such as power generation, oil and gas, petrochemical and chemical have been challenged by low-voltage solutions and their associated logistical challenges.
on Wed, 04/01/2015
When addressing the needs of measurement operations involving various densities and amounts of liquid, Coriolis mass flowmeters are often chosen for their accuracy, durability and reduced maintenance costs. Applications involving custody transfer benefit from their simple and dependable characteristics.
on Thu, 03/05/2015
This is Part II in a four-part series based on the contents of the new textbook, “Control Valve Application Technology, Techniques and Considerations for Properly Selecting the Right Control Valve.”
on Tue, 02/24/2015
This article discusses the importance of selecting the correct flow characteristic and correctly sizing the valve in order for the valve to properly control the process.
on Tue, 02/03/2015
Considering the number of variables present, gaining precise control of a process heating application can be a difficult task. In industries with a low tolerance for irregularities and a high demand for consistent quality, controlling the temperature of a substance from the start to the finish of a process is an absolute necessity.
on Thu, 12/11/2014
Loss of containment is one of the costliest things that can go wrong at a plant. Accordingly, smart enterprises employ a variety of measures that ensure loss of containment just doesn’t happen – or when it does, the adverse circumstances are kept to a minimum.
on Thu, 12/11/2014
The noise abatement laws and health and safety legislation are becoming increasingly strict. Metso introduces Q2- Trim, the optimum solution for noise problems, that at the same time fulfills all legislative requirements and customer needs.
on Tue, 12/09/2014
Emergency order required all rail shippers to test products from the Bakken to ensure proper classifications of the oil within federal regulations before it's transported. The intent was to ensure shippers properly classified crude oil for transportation and to quantify the range of physical and chemical properties.
on Mon, 11/03/2014
Valin introduced its new lease automatic-custody-transfer (LACT) configurator tool. This new software-application tool assists customers in LACT specification, quotes, component data, and reference documentation.
on Mon, 10/06/2014
When developing a practical approach to leakage and pollution prevention, plant managers have a variety of options available in terms of instrumentation and equipment. Depending on the particular process, materials, and type of operation, the method of ensuring the containment of potential contaminants will vary widely.
on Tue, 02/04/2014
Standard practices today simply use human machine interfaces (HMI) as windows into a system by allowing some information to be passed back and forth through those windows. This method anticipates the user having the knowledge to use that information both in and out of the system.
on Wed, 01/08/2014
The future of the petrochemical refining industry will be driven by human-machine interfaces (HMIs) pushing information to where it is needed. An HMI that pushes production, quality and alarm information to the right level of user or management anywhere in the world has the ability to increase the visibility and reaction time.
on Tue, 08/27/2013
A temperature sensor is a key component of any process heating application as it provides temperature feedback about the process, which can be used to monitor or control the process
on Mon, 06/17/2013
Just as sound can have negative effects on the human body, certain frequencies can play havoc on industrial equipment. When control valves are not selected appropriately, there is an increased risk for cavitation, which causes high noise and vibration levels, resulting in very rapid damage to the valve's internals and/or the downstream piping.
on Thu, 08/16/2012
When control valve professionals talk about "control valve sizing," they really mean the entire process of selecting the valve that will do the best job of controlling the process. Selecting the right size valve is an important part of the process, but there are other equally important considerations as well.
Valin provides outstanding solutions and are very responsive to our needs.