Chemical Process Industries Benefit From Liquid Level Control

Level measurement is critically important for chemical process industries and the safety of the equipment they use. Technologies such as chemical reactors, fermentation vessels, and steam and surge drums benefit from accurate level instrumentation. In this blog post, part of Magnetrol’s series on chemical processing applications, we will explore how chemical process industries can utilize level control instrumentation to aid their efficiency. Don’t forget to check out the other blog posts in this series if you missed them. We discussed level and flow solutions for the distilling process on February 10 and solutions for liquid extraction, mixing and blending, and other processes on February 17.

Chemical Reactor

Chemical_Process_Industries_1Application: Chemical, polymerization and pharmaceutical processes utilize reactor vessels to contain chemical reactions. Chemical reaction speed and product quality are frequently controlled by an external heat exchanger for elevating temperature and a cryogenic system for lowering temperature. Reactors typically contain impellers for product mixing.

Challenges: Level instrumentation in a tank-type reactor vessel must contend with diverse and often aggressive product chemistries, agitation, mixing, surface foam and temperature and pressure variations. Low level monitoring in the discharge line, high level monitoring in the vessel, and interfacial measurement of the foam/emulsion interface is recommended.

Level Technologies:
-Series 3 Float-Actuated External Cage Level Switch for point level
– Eclipse® Model 706 Guided Wave Radar Transmitter for continuous level
– Orion Instruments® Atlas™ or Aurora® Magnetic Level Indicators for visual indication

Fermentation Vessel

Application: Industrial fermentation is the process of breaking down organic substancesChemical_Process_Industries_2 and re-assembling them in order to produce other chemical compounds. Alternative fuels like ethanol and chemicals such as methanol and a wide range of acids can be developed using this process. Chemical fermentation takes place in large tanks called fermenters in a process that can either be aerobic or anaerobic.

Challenges: Depending upon the type of fermentation vessel and the media being processed, the level control often must contend with agitation and aeration. Froth or foam is typically generated because fermentation agents have surfactant properties. When processing acids, contact level controls must tolerate the very aggressive media.

Level Technologies:
- Echotel® Model 961 Ultrasonic Level Switch for point level
- ECLIPSE Model 706 Guided Wave Radar Transmitter for continuous level
- ORION INSTRUMENTS ATLAS or AURORA Magnetic Level Indicators for visual indication

Steam Drum

Chemical_Process_Industries_3Application: Chemical manufacturers are major users of steam for cleaning, drying, fermentation, steam stripping, and chemical recovery. Steaming-in-place (SIP) is a widely used method for in-line sterilization of vessels, valves, process lines, and filter assemblies. Steam is created in a boiler where heat transforms water under pressure into steam.

Challenges: Boiler drum level control is critical for safe and efficient steam generation. Drum level control maintains level at constant steam load. Too low a level may expose boiler tubes, which will overheat and sustain damage. Too high a level may interfere with separating moisture from steam, which reduces boiler efficiency and carries moisture into the process.

Level Technologies:
- Series 3 Float-Actuated External Cage Level Switch for point level
– ECLIPSE Model 706 Guided Wave Radar Transmitter or E3 Modulevel® Displacer-Actuated Transmitter for continuous level
– ORION INSTRUMENTS ATLAS or AURORA Magnetic Level Indicators for visual indication

Surge Drum

Application: Surge drums are frequently located between process units to help reduce Chemical_Process_Industries_4the effect of flow rate variations between interconnected process units. A low surge drum level can result in reduced capacity while a high level can cause liquid carry-over. In an application characterized by alternating inertia and turbulence, stable level output is highly desirable.

Challenges: Contrary to the normal control objective of keeping a measurement at set point, the purpose of a surge drum level control is to dampen the changes in controlled flow while keeping the liquid level in the vessel between limits. For surge drums it is generally more important to allow levels to “float” in order to minimize flow rate variations.

Level Technologies:
- Model A15 Displacer-Actuated Level Switch for point level
– ECLIPSE Model 706 Guided Wave Radar Transmitter or E3 MODULEVEL Displacer-Actuated Transmitter for continuous level
– ORION INSTRUMENTS ATLAS or AURORA Magnetic Level Indicators for visual indication

Be sure to follow our blog as we continue to discuss important level control applications for equipment in the chemical process industries, including catalysis vessels, the chlor-alkali process, chemical injection, and deionization. 

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The Buncefield Report and API RP 2350: Comparing Standards for Overfill Prevention

Buncefield_Report_API_2350_WhitePaperThe explosion in 2005 at the Buncefield Oil Depot in Hertfordshire, England was the largest fire in Europe since World War II. The effects of the accident, caused by the overfill of an outdoor petroleum storage tank, have reverberated in the oil and gas industry ever since.

In the wake of the incident, the American Petroleum Institute (API) and the United Kingdom’s Major Incident Investigation Board (MIIB) developed extensive standards revisions to establish good practices for overfill prevention. The MIIB’s Buncefield Report was finalized in 2008, and in 2012, the API Recommended Practice 2350 was released. While the reports reflect the findings of the individual investigations, both the Buncefield Report and the API RP 2350 cover similar topics relating to overfill prevention.

Magnetrol has produced “The Buncefield Report (MIIB) & API RP 2350: A Comparison of Recommendations for Overfill Prevention.” In this white paper, the two documents are compared to identify overlapping recommended practices for the establishment of an effective overfill prevention system. The comparison shows that the action levels and responses assigned to a particular oil storage tank are consistent between the two sets of guidelines.

Magnetrol has also created the API 2350 Readiness Kit, which provides information and insight into overfill prevention compliance. The API 2350 Readiness Kit not only outlines details of an overfill prevention system covered by API RP 2350, it also complements the recommendations of the Buncefield Report. For more information about effective overfill prevention methods, download “The Buncefield Report & API RP 2350: A Comparison” white paper or the API 2350 Readiness Kit.

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Level and Flow Solutions for Chemical Process Equipment

Level measurement plays a critical role in ensuring the safety and efficiency of the chemical process equipment utilized in the chemical industry, including liquid extraction, vapor/liquid separation, and mixing and blending. In this post, part of our series on chemical processing applications, Magnetrol® explores how level control instrumentation can improve the efficiency and safety of chemical process equipment. If you missed our first blog post, on level measurement solutions for the distilling process, you can read it here.

Liquid Extraction

Liquid_ExtractionApplication: Liquid-liquid extraction (LLX), or solvent extraction or partitioning, is a selective separation procedure for isolating and concentrating a valuable substance from an aqueous solution by using an organic solvent. LLX can serve as an alternative when distillation is ineffective. LLX is used in pharmaceutical, food and agricultural processing, organic and inorganic chemistry, hydrometallurgy and fragrances.

Challenges: In mixer-settler type extraction, feed and solvent tanks are monitored for level. The feed and solvent are thoroughly blended in a mixer-settler chamber and the mixture overflows into a separation chamber where it settles into light and heavy phases. The separate phases are monitored and removed on interfacial level control.

Level Technologies:
- Series 3 Float-Actuated External Cage Level Switch or Thermatel® Model TD1/TD2 Thermal Dispersion Switch for point level
– Eclipse® Model 705 Guided Wave Radar Transmitter or E3 Modulevel® Displacer-Actuated Transmitter for continuous level
– Orion® Instruments Atlas™ or Aurora® Magnetic Level Indicators for visual indication

Vapor/Liquid Separation

Application: Where the separation of vapors and liquids is required, a separator drum, or knockout pot, flash drum, or compressor suction drum, is integrated into the process unit. The separation vessel receives the flashing liquid mixture where the liquid is Vapor_Liquid_Separationsubsequently gravity separated and falls to the bottom as the vapor exits at the top.

Challenges: Typically, a collection tank located beneath the separation chamber collects the liquid by gravity flow and utilizes a liquid level control for liquid withdrawal. The control also maintains a vapor barrier while discharging the collected liquid at the same rate of accumulation. In some separators, such as flash drums, liquid level must be kept within an extremely narrow span for very tight control.

Level Technologies:
- Echotel® Model 961 Ultrasonic Switch or THERMATEL Model TD1/TD2 Switch for point level
– ECLIPSE Model 705 Guided Wave Radar Transmitter or ORION Instruments Jupiter® Magnetostrictive Level Transmitter for continuous level
– ORION Instruments ATLAS or AURORA Magnetic Level Indicators for visual indication

Scrubber Vessel

Scrubber_VesselApplication: Scrubbers remove odors, pollutants, acid gases and chemical wastes from air and liquid streams. In a wet scrubber, the polluted stream flows counter currently past water or a liquid chemical which removes the undesirable component of the gas or liquid. Chemical scrubbing typically requires large amounts of caustic chemicals.

Challenges: Accurate level monitoring of the scrubbing water necessitates a control to automatically feed the correct amount of make-up water to the recycle reservoir either continuously or on a periodic basis. Located in the wet scrubber shell, the level monitoring device for water-out control should be equipped with a level alarm.

Level Technologies:
- ECHOTEL Model 961 Ultrasonic Switch or THERMATEL Model TD1/TD2 Switch for point level
– ECLIPSE Model 705 Guided Wave Radar Transmitter or ORION Instruments JUPITER Magnetostrictive Level Transmitter for continuous level
– ORION Instruments ATLAS or AURORA Magnetic Level Indicators for visual indication

Mixing and Blending

Application: Mixing and blending of liquid ingredients is essential throughout the broader chemical industry. In-line and skid mounted systems include batch and continuous mixing for liquid/liquid formulation and blending. An impeller in the process vessel accomplishes the mixing of miscible liquids.Mixing_and_Blending

Challenges: A mixing and blending system can be as simple as a vessel with an agitator and graduate in complexity to a fully skid-mounted PLC controlled system with heating, cooling, homogenization and steam injection capabilities. Level controls monitor tank and vessel levels and trigger alarms in underfill and overfill incidents.

Level Instruments:
- Series 3 Float-Actuated External Cage Level Switch for point level
– Pulsar® Model RX5 Pulse Burst Radar Transmitter for continuous level
– ORION Instruments ATLAS or AURORA Magnetic Level Indicators for visual indication

Be sure to follow our blog in the coming weeks as we discuss level control for other chemical process equipment, including fermentation vessels, steam and surge drums, catalysis vessels, and the chlor-alkali process.

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Chemical Process Technology: Level and Flow Solutions

The chemical industry continues to be a crucial component of the world economy. The high demand and essential nature of chemicals to modern life increases the need for efficiency in chemical process technology. Concerns about safety and environmental impact also create a need to prevent leakage or spilling of potentially harmful substances. In addition, many governments are imposing new regulations on chemical production. Today’s chemical processors need to be productive, creative and efficient to stay competitive in their market.

Level measurement plays a critical role in improving efficiency in chemical processing. In this post and others in a short series of blogs from Magnetrol, we will explore the ways that chemical process technology can benefit from level control instrumentation. This post will focus on various level measurement applications for the distilling process.

Distillation Tower

Screen Shot 2015-02-04 at 2.04.17 PMApplication: Selecting a separation technology from among 20 leading varieties depends upon a chemical’s nature, the number of phases, and the capacity, speed and efficiency required. Distillation—separating substances based on differences in volatilities—is the most widely used separation and purification method. Today, approximately 40,000 distillation towers are operating in U.S. chemical plants.

Challenges: Level measurement at the bottom of a distillation tower controls the “bottoms” product rate. Poor level control could allow liquid to back up over the stripping trays causing damage and reduced yields. Too low level may cause pump cavitation. In related extraction towers, interface level control provides optimal separation from associated substances.

Level Technologies:
- Series 3 Float-Actuated External Cage Level Switch for point level
– Eclipse® Model 705 Guided Wave Radar or E3 Modulevel® Displacer-Actuated Transmitter for continuous level
– Orion® Instruments Atlas™ or Aurora® Magnetic Level Indicators for visual indication

Reboiler

Application: Reboilers, or vaporizers, are heat exchangers that provide heat to the bottom of a distillation tower. They boil the bottom liquid to generate vapors which are returned to the tower to drive the distillation separation process. The reboiler mayScreen Shot 2015-02-04 at 2.04.26 PM partially or completely vaporize the stream it receives from the bottom of the tower.

Challenges: Excess reboiler liquids (bottoms or blow-down) overflow a baffle where level is controlled by means of a level controller. If the reboiler level becomes too low, it will affect the maximum flow rate of bottoms product that can be drawn off. Inaccurate reboiler level can also degrade composition control for material balance control configurations.

Level Technologies:
-Series 3 Float-Actuated External Cage Level Switch or Tuffy® II Float-Actuated Switch for point level
-ECLIPSE Model 705 Guided Wave Radar or E3 MODULEVEL Displacer-Actuated Transmitter for continuous level
-ORION Instruments ATLAS or AURORA Magnetic Level Indicators for visual indication

Condenser

chemical_process_technology_3Application: A heat transfer process that changes a gas or vapor to a liquid, condensation is employed in the reflux process to improve the efficiency of distillation. Condensation can also be employed for producing saturated liquid products, for sub-cooling, or to serve an environmental or vapor recovery function. Condensation is carried out in a variety of configurations.

Challenges: In the distillation process, tower vapors are condensed prior to entering an accumulator. The condenser’s level can be used to control tower pressure where the liquid level set point serves as the manipulated variable (MV) for the pressure controller. Adjusting liquid level in the condenser changes the effective heat-transfer area.

Level Technologies:
- Series 3 Float-Actuated External Cage Level Switch for point level
– ECLIPSE Model 705 Guided Wave Radar Transmitter for continuous level
– ORION Instruments ATLAS or AURORA Magnetic Level Indicators for visual indication

Reflux Drum

Application: Large-scale distillation towers use a reflux system to achieve a more complete product separation. Reflux is that portion of a tower’s condensed overhead liquid product that is cycled back to the top of the tower where it flows downward to provide chemical_process_engineering_4cooling and condensation of the upflowing vapors.

Challenges: The reflux drum, or accumulator, is the piece of chemical process technology that serves as a distribution point for reflux and distillate. Condensed liquid leaves the reflux drum under level control. Drum level control is critical to ensure that the proper amount of reflux will return to the distillation tower. Poor liquid level indication can cause expensive operating problems and product degradation.

Level Technologies:
- Series 3 Float-Actuated External Cage Level Switch for point level
– ECLIPSE Model 705 Guided Wave Radar Transmitter or E3 MODULEVEL Displacer-Actuated Transmitter for continuous level
– ORION Instruments ATLAS or AURORA Magnetic Level Indicators for visual indication

Be sure to follow our blog in the coming weeks as we discuss level control for many chemical processing applications, including liquid extraction and separation, mixing and blending, chemical reactors, and scrubber vessels.

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Optimizing Level Control to Improve Power Plant Efficiency

Optimizing Level Control WebcastThe addition of non-conventional, renewable generation to the energy mix and the ongoing development of climate change protocols are having a significant impact on the operation of conventional fossil plants. Addressing limitations in flexible operation (cycling, ramp rates, load following, etc.) attributed to critical level controls with enhanced technologies can help ensure rapid response to market demands, while mitigating system stress, unit trips and other negative consequences on heat rate.

Donald Hite, development manager for the power industry at Magnetrol®, discusses the effects of advanced level control solutions on the evolving power generation sector in the informative webcast “Optimizing Level Control to Meet New Generation Demands.” In the free webcast, he discusses:

  • Level Control Concerns for Steam Drums and Feedwater Heaters
  • Effects on Ramp Rates and Cycling
  • Cost of Heat Rate Deviation
  • Eliminating Instrument-Induced Error
  • Optimizing Performance
  • Power Plant Efficiency Case Study

MAGNETROL is pleased to share this webcast with instrumentation and control professionals. To view the on-demand webcast, click here.

Heat Rate Webcast

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Thermatel® TA2 Thermal Mass Flow Meter with FOUNDATION fieldbus™ Released

Magnetrol® is pleased to announce the sales release of the Thermatel® TA2 thermal mass flow meter with FOUNDATION fieldbus™ digital output communications. This addition signifies the growth of the TA2 and the MAGNETROL commitment to continued success in flow. The TA2 with FOUNDATION fieldbus™ offers all of the advantages of the standard TA2, such as:

Thermatel_TA2

  • Dual gas calibration with two unique curves (example: propane and natural gas)
  • Field adjustability to install in different gas types or adjust for different gas mixes
  • Calibration verification procedure provides cost savings due to decreased process downtime and unnecessary recalibrations
  • Internal resettable and non-resettable totalizers
  • Strong signal at low flows and low pressures with high turndown
  • ISO 17025 and NIST traceable calibrations

THERMATEL TA2, in conjunction with the Eclipse® Model 706 guided wave radar, E3 Modulevel® and Orion® Enhanced Jupiter® magnetostrictive level transmitters, form the MAGNETROL fieldbus™ family.

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Advantages of the Magnetic Level Indicator

The magnetic level indicator is now widely used throughout process industries as an effective level control device (see our recent article on MLI technology and principle of operation for more information).

A magnetic level indicator is often used in applications where a sight glass (or glass sight gauge) is either ill-suited based on process variables or is underperforming based on plant requirements. These can include enhanced safety for personnel; environmentally risky situations including media leakage or fugitive emissions; need for maintenance reduction; or need for high visibility from a distance. Typical shortcomings of glass sight gauges include:

  • High pressures, extreme temperatures, deteriorating seals/rings/gaskets, and toxic or corrosive materials may cause a risk of fugitive emission of dangerous substances.
  • The glass in a sight glass can become quickly discolored, thus decreasing level visibility, or it can acquire microfractures, which can become a personnel safety issue if left undetected.
  • Liquid/liquid interfaces can be very difficult to read in a sight glass particularly if the liquids are of similar color. Clear liquids can also be difficult to see in a sight glass.
  • Liquids that tend to coat or build-up on surfaces can hinder visibility by forming an opaque film on the glass.
  • To cover a large measuring span, sight glass assemblies typically must be staggered using multiple sections.

Common MLI Tank Configurations

 

The key reasons for selecting a magnetic level indicator over a sight glass are:

  • Improved safety due to the absence of fragile glass and a substantially reduced number of potential leak points.
  • Greatly increased visibility.
  • Reduced maintenance.
  • Easier initial installation and addition of transmitters and switches without interrupting the process.
  • Dual-technology redundancy, with the addition of transmitters or switches, for improved safety.
  • Lower long-term cost of ownership and legitimate return-on-investment benefits.
  • Single chamber measurement over 20 ft. (6 m) without staggering chambers.

Safety
The obvious safety benefit of the MLI over a sight glass is reduced chance of breakage. If the process fluid is under extreme pressure or temperature, the likelihood of sight glass breakage is increased. The pressure boundary of an MLI is made of robust metal, frequently the same as the vessel piping, making MLIs as safe as the surrounding piping system itself. The indicators, transmitters, and switches are all mounted externally and, therefore, are unaffected by toxicity, corrosiveness, or other process fluid characteristics.

Another safety benefit is that the chemical compatibility with the fluid in an MLI is restricted to only three components, the metallic chamber, gaskets and float. With glass sight gauges, the process fluid may have chemical compatibility issues with any of the wetted materials—glass, metal, or sealants.

Maintenance
MLIs are virtually maintenance free once installed because the indicator never touches the process fluid. With sight glasses, the gauges must be periodically checked for leaks and cleaned on a regular basis. Scaling, etching and build-up on the glass from the process fluid can cause the sight glass to become unreadable.

Visibility
Visibility of the fluid level from long distances is another major reason for selecting an MLI over a sight glass gauge. Sight gauge level indicators are intended to be viewed at maximum distances of around 10 feet (3 meters). However, the bright contrasting colors of the flags or a fluorescent shuttle on an MLI permit visible level indication at distances up to 100 feet (30 meters) or greater. Newer, more advanced visual indicators, such as those from Orion Instruments®, have viewing ranges up to 200 ft. (60 m).

Visit Orion Website

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The Magnetic Level Indicator: A Technology Overview

Demands for increased safety and improved efficiency in processing facilities have made the magnetic level indicator an indispensable level control device. With the ability to perform reliably under extreme process conditions, as well as offer dual-technology redundancy for safety critical applications, magnetic level indicators, or MLIs, such as those manufactured by Orion® Instruments, can make a smart alternative for a wide range of level measurement and control needs. Here’s a closer look at the applications and operating principle of MLI technology. In our next blog article, we’ll feature the advantages for using MLIs.

Overview
The magnetic level indicator, also called a magnetically coupled liquid level indicator or a magnetic level gauge, is in widespread use throughout process industries around the world. Originally designed as an alternative to sight glass gauges, MLIs are now commonly utilized in both new construction and plant expansions.

Magnetic_Level_Indicators

Magnetic Level Indicators

Typical applications/locations include:

  • Alkylation units
  • Boiler drums
  • Feedwater heaters
  • Industrial boilers
  • LNG facilities
  • NGL storage vessels
  • Oil / Water separators
  • Process vessels
  • Propane vessels
  • Storage tanks
  • Surge tanks
  • Wastewater tanks

Principle of Operation
Magnetic level indicators use the law of magnetism to provide liquid level information. They can activate a switch or provide continuous level data via a transmitter. Unlike a sight glass, magnetic coupling allows the MLI to measure liquid levels without direct contact between the externally mounted visual indicator and the fluid in the vessel.

A magnetic level indicator is mounted in-line with its respective process vessel.  It is exposed to the process media inside the vessel along with the process pressure and temperature. A float containing an array of magnets is sealed inside the MLI chamber. The float’s magnetic field interacts with the flags located in the visual indicator securely mounted on the outside of the chamber. As liquid rises and falls within the MLI, the float follows the changing level with the magnets remaining in the same plane as the liquid surface. The magnetic field causes the visual indicator flags to rotate, thereby revealing the liquid level inside the MLI.

In an MLI, the magnets within a float and an indicator are magnetically coupled. The float, located inside the chamber, dynamically tracks the surface of the liquid as it rises and falls. The magnet assembly inside the float generates a magnetic field that penetrates through the chamber wall to couple with the visual indicator.

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Safety Standards of Level Control Devices

Level Control Devices and SILMalfunctioning level controls allegedly contributed to the 1986 Chernobyl meltdown and the 2005 Buncefield depot explosion north of London, to name just two of the more notorious incidents. For decades, the industrial firewall against safety incidents as they relate to level controls has been governmental and professional association standards that require manufacturers to make their products according to safety guidelines. The International Standards Association, however, lists some 180,000 varieties of international standards. The key health and safety standards that can affect level control devices and applications fall into three categories: (1) Instrument and Component Standards, (2) Safety Integrity Levels, and (3) Hygienic Standards.

Instrument Standards. The largest group of standards relates to equipment, component and enclosure performance. These standards are authorized by NEMA (National Electrical Manufacturers Association—USA); Underwriters Laboratories (UL—USA); American National Standards Institute (ANSI); American Society of Mechanical Engineers (ASME); The Instrumentation, Systems, and Automation Society (ISA—originally named the Instrument Society of America); Canadian Standards Association (CSA); the European EN 60529 = DIN VDE 0470; IEC (International Electrotechnical Commission); VDE (Institute of German Electronics Engineers); the International Electromechanical Commission (IEC); and TÜV (Germany). Principal organizations with market-relevant technical standards for materials, products, and systems also include the European Union’s ATEX directives (ATmosphere EXplosion); America’s OSHA (Occupational Safety and Health Administration); the American Society for Testing and Materials (ASTM), and the United Kingdom’s Health and Safety Executive (HSE).

Safety Integrity Level (SIL). Another group of directives that relate specifically to level control safety performance are those of the IEC concerning risk reduction. These directives refer to the classification of Safety Instrumented Systems (SISs) according to their Safety Integrity Level (SIL)—that is, according to their potential risk for people, manufacturing processes, and the environment in case of a malfunction. Four SIL levels are defined in these directives, with SIL 4 being the most stringent and SIL 1 being the least. (No standard process controls have yet been defined and tested for SIL 4).

There are two ways an instrument manufacturer can determine and declare their devices suitable for a SIL level. For pre-existing devices, the supplier takes over the “proven in use” procedure, in which the instruments are tested and described according to IEC 61508 and 61511. For new devices, the supplier makes a direct declaration to IEC. This declaration comprises an evaluation of the device based partly on a Failure Modes, Effects and Diagnostics Analysis (FMEDA) and partly on an assessment of the proven-in-use documentation.

Today, many instrument and plant engineers use an instrument’s SIL suitability level as “shorthand” for an instrument’s overall reliability.

Hygienic Standards. A third group of standards relates to hygienic issues concerning the food, beverage, dairy and pharmaceutical industries. These include the Federal Drug Administration (USA authority), the 3-A Sanitary Standards (a group of three USA milk and dairy authorities), the European Hygienic Equipment Design Group (EHEDG—a consortium of European equipment manufacturers, food industries, research institutes, and public health authorities), and the Federal Health Department (Germany).

Understanding Safety Integrity Level SIL

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Wishing You The Best in 2015

MAG_2015_GreetingsMagnetrol International offers our deepest gratitude for your continued support in 2014 and our sincerest wishes for a prosperous 2015.

 

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