Showing posts with label pressure. Show all posts
Showing posts with label pressure. Show all posts

Simplified Operation and Reduced Cost With Safety Transmitters and Switches

Series One Safety TransmittersProcess safety experts continually seek sustainable ways to improve the performance of safety critical loops, achieving risk reduction and safety goals in a cost-effective manner. Some view a reduction in complexity of safety related protocols to be a positive development. Traditional or historical approaches to deploying full blown safety systems were generally associated with great expense and high complexity, and still came up short on delivering the needed levels of risk reduction. Process control device and equipment manufacturers have responded with newer technologies and products that better address the safety needs of industrial processing.

In sensor subsystems, United Electric’s certified safety transmitter for pressure or temperature provides a less costly, simple path for process designers, instrument and control engineers, and maintenance personnel. The Series One Safety Transmitters combine several useful safety and monitoring functions into a single, easy to deploy device. Products are available for gauge pressure, differential pressure, and temperature applications. In addition to a 4-20 mA process variable output, the Series One has an embedded programmable high-capacity relay certified as a safety variable output. The Series One Safety Transmitter provides designers the option of a hard wired trip in less than 100 milliseconds, with a tenth of a percent repeatability, along with the monitoring functions of a traditional continuous analog output.

For equipment under control requiring protection, or processes where rapid excursions can initiate dangerous events, this unique pressure and temperature transmitter is addressing process safety time constraints, coupling issues with PLC and DCS units, and adding diversity to the safety instrumented function.

There is a whole lot more to learn about these "Safety right out of the box" industrial pressure and temperature safety transmitters. A product data sheet is provided below, but you can get the latest and most detailed product and application information from a specialist in industrial process measurement and control. Share your safety instrumentation challenges with them, combining your process expertise with their product application knowledge to develop effective solutions.

Learn more about the UEC One Series by visiting this page on the Miller Energy web site.




How Do Pilot Operated Tank Relief Valves Work?

Storage tanks become pressurized when liquid is pumped in and compresses the existing tank vapor. Tanks also become pressurized due to increasing ambient temperatures, which cause the tank vapor to expand. To mitigate damage from these expanding tank vapors, pressure relief valves are installed on tanks to prevent structural damage resulting from over-pressure.

Here is an excellent animation, courtesy of Cashco, that shows how a pilot operated relief vent protects a storage tank from over pressurizing during a pump-in situation or during thermal heating conditions.


For more information on tank relief valves, contact Miller Energy at www.millerenergy.com or by calling 908-755-6700.

Register Early for the Yokogawa Users Conference 2018

Yokogawa Users Conference North America
The Yokogawa Users Conference for North America will be held
on September 10 - 13 in Orlando, FL
Yokogawa is hosting its Users Conference in Orlando FL for 2018. This excellent event enables attendees to:

  • Learn how to maximize the value of their measurement and control investment.
  • View and learn about the latest products and solutions for process measurement and control.
  • Interact with subject experts and Yokogawa partners.
  • Network with industry peers.
  • Build knowledge of best practices for particular industries and measurement and control in general.
There will be panel discussions, technical sessions, exhibits and more. The event is scheduled for September 10th through 13th, and early registration has started. Make plans to attend and build your knowledge base. You can find the registration information at the conference website, or reach out to a Yokogawa representative to find out more.

Focus Your Product Selection Quickly With This Useful Tool

Yokogawa Process Instrumentation Selection Tool
The Process Instrumentation Selection Tool from Yokogawa
enables the user to make detailed product selections
with a few clicks.
Image courtesy Yokogawa
In the process measurement sphere, manufacturers respond to market demand and their own growth goals by offering integrated product solutions. This can result in a product offering that is extensive, with many different products that can be applied to the same task. There are often several, or many, choices to winnow down to a final selection. Product research and evaluation for application suitability takes time. In today's business environment, time is what we never seem to have in sufficient quantity. Finding ways to streamline any process can be beneficial.

Yokogawa is one of those companies that manufactures a broad range of products for process measurement. Whatever your process measurement needs, it is likely the Yokogawa has an effective solution that delivers solid quality and performance.

In a past blog posting, we introduced readers to Process Instrument Selection Tool. With some basic information about your application, a few clicks can quickly deliver access to the best product selection for an application. It is simple, rapid and accurate. The product selector covers 24 basic measurement and instrumentation classifications. We are posting about it again because it has been so successful in helping customers zoom in on the right product solutions for their process measurement applications.

The Product Finder is accessible through a number of links throughout Yokogawa's network of representatives. Clicking the link lands you on the start page of the Product Finder. Try it out, and share your process measurement and control challenges with application specialists for even more leveraging of your own process knowledge and experience toward an effective solution.

Wireless Transmitters In Process Measurement and Control

industrial wireless temperature transmitter
Wireless industrial temperature transmitter
Courtesy Yokogawa
In process control, various devices produce signals which represent flow, temperature, pressure, and other measurable elements of the process. In delivering the process value from the measurement point to the point of decision, also known as the controller, systems have traditionally relied on wires. More recently, industrial wireless networks have evolved, though point-to-point wireless systems are still available and in use. A common operating protocol today is known as WirelessHARTTM, which features the same hallmarks of control and diagnostics featured in wired systems without any accompanying cables. Other wireless standards are employed in industrial settings, as well.

Wireless devices and wired devices can cohabitate the same network. The installation costs of wireless networks are decidedly lower than wired networks due to the reduction in labor and materials for the wireless arrangement. Wireless networks are also more efficient than their wired peers in regards to auxiliary measurements, involving measurement of substances at several points. Adding robustness to wireless, self-organizing networks is easy, because when new wireless components are introduced to a network, they can link to the existing network without needing to be reconfigured manually. Gateways can accommodate a large number of devices, allowing a very elastic range for expansion.

In a coal fired plant, plant operators walk a tightrope in monitoring multiple elements of the process. They calibrate limestone feed rates in conjunction with desulfurization systems, using target values determined experientially. A difficult process environment results from elevated slurry temperature, and the associated pH sensors can only last for a limited time under such conditions. Thanks to the expandability of wireless transmitters, the incremental cost is reduced thanks to the flexibility of installing new measurement loops. In regards to maintenance, the status of wireless devices is consistently transmitted alongside the process variable. Fewer manual checks are needed, and preventative measures may be reduced compared to wired networks.

Time Synchronized Mesh Protocol (TSMP) ensures correct timing for individual transmissions, which lets every transmitter’s radio and processor ‘rest’ between either sending or receiving a transmission. To compensate for the lack of a physical wire, in terms of security, wireless networks are equipped with a combination of authentication, encryption, verification, and key management. The amalgamation of these security practices delivers wireless network security equal to that of a wired system. The multilayered approach, anchored by gateway key-management, presents a defense sequence. Thanks to the advancements in modern field networking technology, interference due to noise from other networks has been minimized to the point of being a rare concern. Even with the rarity, fail-safes are included in WirelessHARTTM.

All security functions are handled by the network autonomously, meaning manual configuration is unnecessary. In addition to process control environments, power plants will typically use two simultaneous wireless networks. Transmitters allow both safety showers and eyewash stations to trigger an alarm at the point of control when activated. Thanks to reduced cost, and their ease of applicability in environments challenging to wired systems, along with their developed performance and security, wireless industrial connectivity will continue to expand.

Share your process measurement and control challenges with knowledgeable professionals, combining your own process knowledge and experience with their product application expertise to develop effective solutions.

Diaphragm Seals For Protection of Process and Pressure Instruments

diaphragm seal for industrial process pressure sensor or gauge
One of many diaphragm seal variants
Courtesy Wika
Pressure measurement is a common element industrial operations or control systems. Fluid processing can often involve media that is potentially harmful to pressure sensing devices. The media may be corrosive to the sensor material, or other media properties may impact the performance or usable life of the instrument. In process control environments, diaphragm seals play a role in protecting items like pressure sensors from damage by process fluids. The diaphragm seal is a flexible membrane that seals across the connecting path to a sensor and isolates the sensor from the process media. System pressure crosses the barrier without inhibition, enabling accurate measurement, but the process fluid does not. Typical materials composing diaphragm seals are elastomers, with a wide variety of specific materials available to accommodate almost every application.

In the operating principle of the diaphragm seal, the sealed chamber created between the diaphragm and the instrument is filled with an appropriate fluid, allowing for the transfer of pressure from the process media to the protected sensor. The seals are attached to the process by threaded, open flange, sanitary, or other connections.  Diaphragm seals are sometimes referred to as chemical seals or gauge guards. Stainless steel, Hastelloy, Monel, Inconel, and titanium are used in high pressure environments, and some materials are known to work better when paired with certain chemicals.

Sanitary processes, such as food, beverage, and pharmaceuticals, use diaphragm seals to prevent the accumulation of process fluid in pressure ports, a possible source of contamination. If such a buildup were to occur, such as milk invading and lodging in a port on a pressure gauge, the resulting contamination compromises the quality and purity of successive batches. Extremely pure process fluids, like ultra-pure water, could be contaminated by the metal surface of a process sensor. Some pneumatic systems rely on the elimination of even the smallest pressure fluctuations, and diaphragm seals prevent those by ensuring the separation of the process materials from the sensors.

Diaphragm seals are not without some application concerns, and devices are now built to address and counter many potential issues related to the use of diaphragm seals with process monitoring instruments and equipment. Products seek to eliminate any and all dead space, allow for continuous process flow, and are self-cleaning thanks to continuous flow design. Some high pressure seals come equipped with anti-clogging features, accomplished by the elimination of internal cavities while protecting gauges. Multi-purpose seals reduce temperature influence and improve instrument performance while pinpointing and diffusing areas of high stress. These pre-emptive measures result in longer instrument life-cycles and improved performance while ensuring protection from corrosion.

There are numerous options and available diaphragm seal variants. Share your application specifics with a product specialist, combining your own process knowledge and experience with their product application expertise to develop an effective solution.

Quick Reference Guide for Pressure and Flow Instrumentation

Process mass flow controller
Mass Flow Controller
Courtesy Brooks Instrument
Brooks Instrument is a globally recognized manufacturer of flow and pressure instrumentation for scientific and industrial use. The company's product line ranges through:

Variable Area Flowmeters - Armored metal, glass tube and plastic for reliable measurement of liquids and gases

Mass Flow Controllers - Coriolis and thermal mass flow technology for precision fluid measurement and control

Pressure Controllers - Digital and mechanical pressure regulators and controllers deliver high precision gas control

Pressure and Vacuum Products - Pressure transducers, gauges, and capacitance manometers

Vaporization Products - Deliver controlled high purity vapor to processes from source liquid

There are many products and variants. The company developed a summary document that provides an overview of the various product types, enabling potential users to focus quickly on the instruments that will meet their requirements. The document is included below.

Share your pressure, vacuum, and flow measurement and control challenges with product application specialists, combining your process knowledge and experience with their product application expertise to develop effective solutions.





Diaphragm Pressure Gauges for Industrial Process Measurement

diaphragm pressure gauge for industrial process measurement
Example of a diaphragm pressure gauge
Courtesy Wika
Diaphragm pressure gauges, like every device and instrument intended for use in industrial process measurement and control, have their own set of attributes making them an advantageous choice for some range of applications. Silvia Weber, product manager at Wika, a globally recognized leader in the field of pressure and temperature gauges, wrote an article for Process Worldwide (process-worldwide.com/) about diaphragm pressure gauges.

The article is included below and provides a comparison of the differences between Bourdon tube and diaphragm operating mechanisms, focusing on design and operational features of diaphragm pressure gauges and the range of application criteria for which they may be the best choice.

Pressure gauges are utilized in most operations where fluids are moved through a system. Gauges, though mechanical in operation, remain a mainstay of fluid operations because of their reliability, local display, ruggedness, and lack of reliance on electric power for operation. There are countless pressure gauge configurations to suit every application. Specifying the best gauge configuration for an application is accomplished by combining your process knowledge with the application expertise of a product specialist.


Industrial Process Gauges - New Product Guide

industrial pressure gauge
One of the many pressure gauge versions
employed throughout industry
Courtesy Ametek - U.S. Gauge
Even with the large growth in the use of electronic measurement instruments throughout the process control sphere, mechanical gauges and indicators remain an important part of process measurement and control operations.

A broad line of industrial gauges and diaphragm seals is available from U.S. Gauge. The company has consolidated its offering into a product guide that provides simple and quick reference to the various product series.

For pressure:

  • Process Gauges
  • Liquid Filled Gauges
  • Test Gauges
  • General Equipment Gauges
  • Special Application Gauges

For temperature:

  • Adjustable Bimetallic Thermometers
  • Thermowells
  • Industrial Bimetallic Thermometers
  • Multi-Angle Industrial Thermometers
  • Digital Thermometers
  • Glass Tube Thermometers
The product guide also includes diaphragm seals and a range of electronic indicators, as well.

The guide illustrates gauges for every industrial application. Share your process measurement and control challenges with product application specialists, combining your process knowledge with their product application expertise to develop effective solutions.



Basic Guide to Understanding Pressure

absolute pressure transmitter for industrial process measurement control
One style of absolute pressure transmitter
Courtesy Yokogawa
The impact of pressure on industrial processes would be difficult to understate. Pressure is an element of process control that can affect performance and safety. Understanding pressure concepts and how to effectively measure pressure within a process are key to any operator's success.

Yokogawa, a globally recognized leader in process measurement and control, has made available a handbook on pressure that covers a range of useful topics. The content starts with the very basic concepts and moves quickly to practical subjects related to process measurement and control.

The handbook will prove useful to readers at all levels of expertise. Share your process measurement challenges with application specialists, combining your process knowledge with their product application expertise to develop effective solutions.



Use Manifold Valves With Pressure Transmitters

manifold valves for pressure transmitters and gauges
Manifold Valves for Pressure Gauges and Transmitters
Pentair - Anderson Greenwood
Pressure transmitters are generally fixed in place, but require regular access for calibration and operational testing. Unlike instruments used to measure some other process conditions, a pressure transmitter is directly connected to the process, making it's removal problematical. Manifold valves provide a compact and effective means of access and isolation needed to perform regular maintenance and calibration operations while maintaining the pressure transmitter in place.

A single pressure transmitter or gauge can be served by a simple 2-valve manifold. One valve provides isolation of the instrument from the process. The second valve opens to atmosphere on the instrument side of the isolation valve. This allows the pressure transmitter or gauge to be isolated from the process and connected to a calibration source. Here is a schematic example.
Certainly, any qualified technician can cobble together this arrangement from a pile of valves and fittings. The advantages of using a manifold valve are several.
  • High pressure rating
  • Reduced leakage potential
  • Compact size
  • Comparatively rapid installation
There are numerous manifold valve configurations to accommodate any valve and gauge requirement. Manifold valves can also be used in other applications for making effective and convenient connection arrangements between instruments and processes. Share your connectivity challenges and requirements with process instrumentation specialists, combining your process knowledge with their product application expertise to develop the best solutions.



Setting Up the United Electric Controls Series One Safety Transmitter

Here is a two part tutorial showing how to setup your United Electric Series One Safety Transmitter. If you need any additional help or product information, reach out to a product specialist.

Part One Video

Part Two Video

Safety Transmitters For Temperature and Pressure

safety transmitter for industrial process control pressure temperature
Series One Safety Transmitter
United Electric Controls
Industrial history is replete with examples of catastrophic accidents. New safety technologies exist today that can prevent or mitigate mishap and disaster in fluid processing and other operations. Modern philosophy of plant safety brings a focus on a proactive approach. Process operators have a new sense of urgency to bring increased levels of safety to their operations.

The United Electric Controls (UE) Series One is a SIL-certified (Safety Integrity Level) transmitter designed solely for safety, alarm, and shutdown. With reliability, speed, and reduced nuisance trips an integral part of its design, the Series One is suitable for application in new installations, or easily integrated into existing operations.

A typical safety loop consists of sensors (such as a pressure or temperature transmitter), controllers, and final control elements. Most SIL-rated pressure transmitters require 300ms to communicate with the controller, then up to 500ms for the controller to send a signal to the final control element (such as a valve). This combined response time may insufficient for some applications. Incorporating the One Series Safety Transmitter, directly connected to the final control element, the total signal time is reduced to 100ms - a large and significant time savings when safe operating conditions have been breached. When used with blowers, pumps and compressors, the One Series makes up a complete safety system with a self-contained sensor, controller, and final control element (the switch) capable of SIL2 without additional safety instrumented function (SIF) components.

The below document provides detailed information about the Series One. Share your process safety challenges with the instrumentation specialists and combine your process knowledge with their product application expertise to produce effective solutions.



Miller Energy Introductory Video

Miller Energy is a Manufacturer's Representative and Distributor of Industrial Instrumentation and Process Control Equipment. Since 1958, Miller been committed to exceeding our customers expectations by providing an unparalleled level of customer service and local technical support. Miller Energy maintains two office locations in NJ and PA. The South Plainfield, NJ operation services the areas of Northern NJ, New York, and Fairfield County Connecticut and serves as our corporate headquarters. The Exton PA office serves the areas of Southern NJ, Eastern PA, Delaware and Maryland.


Safety Transmitters Achieve Safety Goals With Reduced Cost and Complexity


safety transmitter for temperature, pressure, differential pressure applications in industrial process control
Series One Safety Transmitter
United Electric Controls
Process safety experts continually seek sustainable ways to improve the performance of safety critical loops, achieving risk reduction and safety goals in a cost-effective manner. Some view a reduction in complexity of safety related protocols to be a positive development. Traditional or historical approaches to deploying full blown safety systems were generally associated with great expense and high complexity, and still came up short on delivering the needed levels of risk reduction. Process control device and equipment manufacturers have responded with newer technologies and products that better address the safety needs of industrial processing.

In sensor subsystems, United Electric’s certified safety transmitter for pressure or temperature provides a less costly, simple path for process designers, instrument and control engineers, and maintenance personnel. The Series One Safety Transmitters combine several useful safety and monitoring functions into a single, easy to deploy device. Products are available for gauge pressure, differential pressure, and temperature applications. In addition to a 4-20 mA process variable output, the Series One has an embedded programmable high-capacity relay certified as a safety variable output. The Series One Safety Transmitter provides designers the option of a hard wired trip in less than 100 milliseconds, with a tenth of a percent repeatability, along with the monitoring functions of a traditional continuous analog output.

For equipment under control requiring protection, or processes where rapid excursions can initiate dangerous events, this unique pressure and temperature transmitter is addressing process safety time constraints, coupling issues with PLC and DCS units, and adding diversity to the safety instrumented function.

There is a whole lot more to learn about these "Safety right out of the box" industrial pressure and temperature safety transmitters. A product data sheet is provided below, but you can get the latest and most detailed product and application information from a specialist in industrial process measurement and control. Share your safety instrumentation challenges with them, combining your process expertise with their product application knowledge to develop effective solutions.



Pressure Relief Valve - Guardian of the Vessel

Gas fired industrial boiler
Pressure relief valves protect this industrial boiler
from conditions beyond maximum allowable working pressure
Danger and hazards are an integral part of industrial processes. The mitigation of these dangers and hazards, as well as reducing the probability of their occurrence, is the primary charge of industrial process engineering. Every product intended for use in a process control setting has safety and protection included in its design criteria. Pressure relief valves fall in that category of products designed and intended solely for safety purposes.

Manufacturers of what most generally refer to as pressure relief valves break the genre down into two distinct groups, relief valves and safety valves. One manufacturer, Anderson Greenwood (a Pentair brand), distinguishes the two valve types in their "Pentair Pressure Relief Valve Engineering Handbook"...
Relief Valve: A pressure relief valve characterized by gradual opening or closing generally proportional to the increase or decrease in pressure. It is normally used for incompressible fluids.
Safety Valve: A pressure relief valve characterized by rapid opening or closing and normally used to relieve compressible fluids.
The difference between the two valve types is found in their response to an excessive pressure condition. The relief valve, according to the definition, responds proportionally to the pressure increase, whereas the safety valve provides a non-proportional rapid response. Note also that the relief valve is generally intended for use with liquids (incompressible) and safety valves are commonly applied to compressible fluids, which would include steam and air.
pilot operated pressure relief valve
Pilot Operated Pressure Relief Valve
Courtesy Anderson Greenwood

Pressure relief valves are found anywhere pressure is contained, be it a piping system, vessel, even a
household pressure cooker. The purpose of the relief or safety valve is to protect a pressurized system or vessel, should the system pressure exceed the maximum allowable working pressure. Simply put, keep it from breaking apart.

Because of the potentially catastrophic nature of a pressurized system failure, there is a high level of scrutiny, regulation, and testing focused on pressure relief and safety valves. The proper sizing and selection of the valves is also critical to providing proper function.

I have included a product bulletin from Anderson Greenwood with this article. Browse through it. It provides solid technical information, along with some excellent cutaway illustrations showing how the valves function. You are bound to discover something you did not know about safety and relief valves and their proper application. You can also contact the specialists at Miller Energy for assistance in proper valve sizing and selection.



Data Acquisition - A Step in the Direction of Process Improvement

Data acquisition, like an equipment acquisition, is the procurement of an asset. Data is an asset. It helps an operator evaluate process or business conditions and make decisions that impact the success of the organization. Let’s define data acquisition as the sampling of signals that represent a measurement of physical conditions and the conversion of those signals into a numeric form that can be processed by a computer. A data acquisition system will generally consist of sensors, transmitters, converters, processors, and other devices which perform specialized functions in gathering measurements and transforming them into a usable form.

Industrial data acquisition equipment
DAQ incorporating data acquisition, process
control, recording, display and networking
in a single compact unit
Courtesy Yokogawa Corp.
Industrial process operators and stakeholders benefit from the collection and analysis of data by enhancing performance of valuable facets of the process or activity. Data acquisition, commonly known as DAQ, is widely employed in high stakes and sophisticated processes where there is a true need to know current conditions. A desire for increased profit drives the need for increased process output and efficiency. A desire to reduce risk of loss drives the need for reduced downtime and improved safety. Today, there are likely many useful applications for data acquisition that are not being tapped to their fullest potential. The modest cost and simplicity of putting a data acquisition system in place, compared to the benefits that can be derived from a useful analysis of the data for your operation or process, makes the installation of a data acquisition system a positive move for even small and unsophisticated operators in today’s market.

What we call DAQ today started in the 1960’s when computers became available to businesses of large scale and deep pockets. By the 1980’s, personal computers employed in the business environment could be outfitted with input cards that enabled the PC to read sensor data. Today, there is an immense array of measurement and data collection devices available, spanning the extremes of price points and technical capability. For a reasonable cost, you can measure and collect performance data on just about anything. You can get an impression of the simplicity, modularity, and compactness of a modern system with a quick review of this product.

Data acquisition has an application anywhere an operator or stakeholder can benefit from knowing what is occurring within the bounds of their process or operation. Here is a partial list of the many physical conditions that can be measured in industrial settings:


Industrial data acquisition equipment
Other examples of industrial data acquisition equipment
Courtesy Yokogawa Corp.
  • Temperature
  • Pressure
  • Flow
  • Force
  • Switch Open or Closed
  • Rotational or Linear Position
  • Light Intensity
  • Voltage
  • Current
  • Images
  • Rotational Speed

Consider your industrial process or operation. Are there things you would like to know about it that you do not? Would you like to increase your insight into the workings of the process, how changes in one condition may impact another? Do you know what operating condition of each component of your process will produce the best outcomes? Is reducing maintenance, or heading off a failure condition before it occurs something you would like to have in your operation? Applying your creativity, ingenuity and technical knowledge, along with the help of a product expert, will help you get the information you need to improve the outcomes from your industrial process or operation.

Welcome to the Process Measurement, Instrumentation and Control Blog, sponsored by Miller Energy

Welcome! We hope (over time) you find this blog interesting to visit and it becomes a trusted resource for process measurement and control. We plan on weekly educational and informative blog posts innovative process control solutions, insight to how industrial controls work, and new products that solve tough engineering challenges. Please come back often!