Monday, September 17, 2018

Non-invasive, Clamp-on Flowmeters for Boiler Feed Water, Fuel Oil, and Natural Gas Feeds in Power Plants

Clamp-on Flowmeters in Power Plants
Clamp-on Flowmeters in Power Plants
Natural gas fired plants burn the gas to heat boiler feed water up and convert it to steam for subsequent electricity generation. It is critical for the safety and performance of the power plant to monitoring and control the flow of boiler water feed lines.

FLEXIM, a manufacturer of clamp-on transit-time ultrasonic flowmeters, offers it's high temperature clamp-on WaveInjector mounting fixture as a very accurate and reliable device that accurately measures flow, even at pipe wall temperature of 400 °C / 750 °F. Since the measurement system is completely non-invasive, there is no concern about the pressurization levels within the pipe. Furthermore, Flexim's component design doesn’t cause any pressure drop and eliminates the need for process shut-downs for installation or service. Flexim also offers a unique integrated technology they call "HybridTrek mode" which can detect steam entrainment in the feed water flows – a clear cause for decreased plant performance.

Another area where non-invasive, clamp-on flowmeters are advantageous on fuel oil or feed gas supply. Flexim "Flexus" meters are also ideal to measure and monitor the flow of fuel oil or gas to the boilers to achieve the optimum efficiency.

Flexim flowmeter
Ultrasonic flowmeter for harsh environments.
(Flexim)
Historically, fuel oil feed lines are either monitored by the use of orifice plates and differential pressure or positive displacement meters, both of which require hours of maintenance due to wear and tear by the abrasive and partially clogging medium. A non-invasive ultrasonic clamp-on flow meter technology offers a much better solution. No pipe cutting or welding, zero contact with the process medium, matched and paired transducers, sophisticated high-speed flow calculations and very rugged stainless steel construction make the Flexim flowmeter an excellent choice, even in this harsh
environment.

For gas feed lines, FLEXIM developed a special transducer technology called Lamb wave transducers to offer the most accurate clamp-on flow measurement possible. The clamp-on measurement system is independent from pipe dimensions, material and wall thickness.  There are no upper pressure limits and even on very low pressure lines, the flow meter is capable of carrying out a bi-directional flow measurement over a wide turndown range. By factoring in pressure and temperature (as well as the individual gas composition if needed), the FLUXUS gas flow meter outputs normalized flow rates.

For more information on applying non-invasive ultrasonic clamp-on flow meters in power plants, contact Classic Controls by visiting https://classiccontrols.com or by calling 863-644-3642.




Wednesday, August 22, 2018

The Best Alternative for the Discontinued Moore / Siemens 353 SLC Controller

Siemens has discontinued their 353 SLC controller. The 353 was used in many process applications for many years. It's discontinuation leaves many companies without an alternative.

Don't worry - you don't have to turn to eBay looking for spare parts? There's a better solution - the Yokogawa YS1700 PID loop controller. The YS1700 is a drop-in SLC replacement for the Siemens 353 and will keep you off of eBay.

The YS1700’s powerful function block programming allows for custom strategies to control many demanding processes such as boilers and steam generators, PH control, dosing control, and many other demanding plant processes. For more information, visit this site.

Monday, August 13, 2018

Understanding How Radiometric (Radiation-based) Level Measurement Works

Radiometric (also known as radiation-based) level measurement uses a very slightly radioactive isotope that emits focused gamma rays. A sensor, which is mounted on the opposite side of the vessel, receives this radiation. Because gamma rays are attenuated when penetrating matter, the sensor can calculate level, point level, density or mass flow from the intensity of the incoming radiation.

Advantages are:
  • Maximum operational reliability even in the harshest environments
  • Measurement is independent of pressure, temperature and product aggressiveness
  • Measuring system can be installed on the outside of a vessel during ongoing production
Watch this video to understand more.

For more information contact:
https://classiccontrols.com
863-644-3642

Sunday, July 22, 2018

Classic Controls Becomes Associate Member of CARILEC

Caribbean Electric Utility Services Corporation
Classic Controls is very please to announce the company has been accepted as an Associate Member of CARILEC (Caribbean Electric Utility Services Corporation).

CARILEC is an association of electric services, dealers, manufactures and other stakeholders operating in the electricity industry in the Caribbean region, Central and South Americas and Globally.

CARILEC was established in 1989 with an original nine members as part of an electric utilities modernization project funded by USAID and implemented by NRECA under a five-year "Co-operative Agreement." Currently, CARILEC comprises a total of one hundred and six (106) members. This includes thirty five (35) Full Members that are electric utilities and sixty six (66) Associate Members that are companies involved in some aspect of servicing the electric utility business and four (5) Affiliate Members. The vision of CARILEC is "To be the Premier Association of Electric Utilities and Industry partners; facilitating the development of world class electric energy services for all peoples of the Caribbean."

Classic Controls Classic Controls is a total solutions, single-source provider of industrial process instruments for the entire Caribbean. Along with representing “best-in-class” manufacturers, Classic Control's employees are people driven by total customer satisfaction, with a field salesforce who are technically strong, conscientious, and who can properly apply, train, and support the products they apply.


Friday, July 13, 2018

Quarter Turn vs. Linear Industrial Valves

Linear valve
Linear control valve (Masoneilan)
Different types of valves are designed and applied for different roles in the process control. Linear valves and quarter-turn valves are two different types of valves utilized throughout industry to regulate and control fluid flow. Their design and construction reflect the intent of the valves application, with each being suited for a different class of use.

All valves operate by providing control of the position of an internal structure that impedes fluid passage to some degree. Generally, fluid flow at the valve can be characterized as one of three conditions, unrestricted (valve fully open), stopped (valve fully closed), and throttled (valve partially open). Process operational requirements will dictate whether just two (fully open and fully closed) or all three of those conditions will be needed. Many aspects of the fluid, the process, and the surrounding environment come into play when making an appropriate valve selection. Not always an easy task.
solenoid valve
Solenoid valves are
a type of linear valve.
(ASCO)

Linear valves are generally characterized by their straight line motion that is used to position the valve plug, disc, diaphragm or other flow controlling element. The shape, size, and arrangement of the linear valve trim is generally intended to empower the operator with a range of flow through the valve. Through its positioning, the linear valve is able to regulate fluid flow at a slower, but more accurate rate. The valves can move a disk or a plug into an orifice, or push a flexible material, such as a diaphragm, into the flow passage. Gate valves and globe valves are common examples of linear motion valves. A solenoid valve also acts as a specialized type of linear valve. Linear valves are best applied as flow controllers, and are often suited for frequent operation and repositioning.

Quarter turn valve
Ball valves are examples
of quarter turn valves.
(QTR)
Quarter turn valves traverse from fully open to fully closed by a 90 degree rotation of a shaft connected to the controlling element. Their comparatively simple operation allows for a design that is rugged and compact. One distinction of the quarter turn valves is their ability to quickly reposition from open to closed positions. Torque requirements to operate the valves are generally low to moderate. Ball and butterfly valves are examples of quarter turn valves.

Depending on the specific scenario, linear valves and quarter-turn valves are optimal choices for particular process environments. The accuracy of the linear valve and its ability to move in a linear fashion as opposed to a quarter-turn comes coupled with easy maintenance and decreased likelihood of cavitation. Both valve types enjoy widespread use and should generally not be viewed as competing designs for the same application. Each has a range of applications where it excels.

Contact Classic Controls for any industrial valve requirement by visiting https://classiccontrols.com or by calling 863-644-3642.

Tuesday, July 3, 2018

Happy 4th of July from Classic Controls

"America is much more than a geographical fact. It is a political and moral fact — the first community in which men set out in principle to institutionalize freedom, responsible government, and human equality."

Adlai Stevenson


Saturday, June 30, 2018

Drying Compressed Air In Hazardous Atmospheres

Compressed Air DryerIn many industries, the atmosphere, though safe to breath, may be unsafe for an electrical spark. These areas often have pneumatically operated equipment for safety. And that equipment needs a source of clean dry air or as it is called in the industry, Instrument Grade Air. Plants typically have a centralized instrument grade air line that delivers air to the instruments that need it. However, oftentimes the instrument grade air is of inferior quality and contaminated with water. This air will benefit from a point of use drying system that guarantees instrument grade air. Traditional drying systems using PSA (Pressure Swing Adsorption) or refrigerant require expensive modifications to operate within hazardous areas. Air dryers made from hollow fiber membranes can dry compressed air without the use of electricity and are therefore safe for hazardous environments.

Hazardous locations have or could potentially have high concentrations of flammable gases, vapors, combustible dusts or ignitable fibers and flyings. Refineries, chemical processing plants, mines and grain mills are examples of industries with hazardous atmospheres. Even a small spark can lead to a horrific explosion dangerous to equipment and workers in the area.

Read the rest of the Parker Balston white paper in the embedded document below, or download your PDF version of "Drying Compressed Air In Hazardous Atmospheres" here.

For more information, visit https://classiccontrols.com or call 863-644-3642.