Your browser is currently set to block JavaScript.

For full functionality of this site it is necessary to enable JavaScript. Here are the instructions how to enable JavaScript in your web browser.

After enabling javascript, please refresh the page to go back to experts.com site with full functionality

Would you turn off/on JavaScript?

It's a widely used language that makes the web what it is today, allowing for websites to be more responsive, dynamic, and interactive. Disabling JavaScript takes websites back to a time when they were simple documents without any other features.

What are the advantages of using JavaScript?

Speed. Since JavaScript is an 'interpreted' language, it reduces the time required by other programming languages like Java for compilation. JavaScript is also a client-side script, speeding up the execution of the program as it saves the time required to connect to the server.

banner ad
Experts Logo

articles

Anti-Scale Valves

By: Dr.-Ing. Dirk A. Lindenbeck
Stainless Valve Co.
Division of B+E Mfg. Co., Inc
4811 Persimmon Ct.
Monroe, NC 28110

Tel: (704) 953-2803
Email Dr.-Ing. Dirk A. Lindenbeck
Website: www.bemfg.com

Profile on Experts.com.



In various industries there are valve applications where the standard valves used do not function satisfactorily. When scale is formed on the moving elements of ball valves or gate valves the consequence is either blocking of the valve movement or damage to the valve seats and consequent leaking through the valves.

A development of AS Stargate-O-Port� valves was carried out in 1995, which lead to a good performance in pulp manufacturing. Later the same principle was used in the food industry. The most impressive application was in mining, where standard valves had to be exchanged every two weeks, whereas the Anti-Scale valves are in operation now for three to four years without any need for refurbishment. The increased production by eliminating downtime has paid many times already for the investment in the valves.

1. Introduction
In applications of valves in the process industry there are many challenges to be met, corrosion, abrasion, pressure shock waves, temperature shocks just to mention a few. Less frequently but often with more critical consequences an effect is found in scale formation in valves. Another problem is the dealing with sticky flow media. Both these effects usually lead to problems with the performance of valves and often also have a severe effect on the safety of personnel.

The consequences of these effects are often damage to the valve seats when the valves are actuated, which then leads to leakage through the valves. Deviation in the process, inconsistent quality of the produced material, loss of energy and increased production cost are the result.

The most critical consequence may be experienced when the valves cannot be operated at the required time. This can lead again to inconsistent quality of the produced material, possibly loss of a major amount of product and even worse possibly hurting persons when the valves have safety functions.

In any case the affected valve applications have to be analyzed and solutions to be found in order to minimize the effects of scaling and sticky materials.

2. Stargate-O-Port� Valves
About 30 years ago Stainless Valve Company first developed a valve called Big Blow. A pulp mill had a severe problem using ball valves on as blow valves on batch digesters. The life of the ball valves was between two months and two weeks. This unacceptable performance of the ball valves called for the development of a valve, which today usually has a service life between refurbishments of about 3 years or more, depending on the piping system.

Meanwhile the same basic principle is used for our OPort valves for other applications in many different industries, like power generation, food, oil and gas, petrochemical and others.

Much was learnt from the blow valves and applied to the development of modern O-port valves for other applications. The basic principle of the valves is the same.

. . . Continue to article and footnotes (PDF).


Dr.-Ing. Dirk A. Lindenbeck is a consultant for B+E Manufacturing Co., Inc. and Stainless Valve Co. B+E consists of Machining on computerized numerically controlled milling and turning centers, using computer aided design (CAD) and computer aided manufacturing (CAM) for programming the Machine Tools. B + E does machining service for customers and assembly work of machines and equipment of its own and customer design.



See Dr.-Ing. Dirk A. Lindenbeck's Profile on Experts.com.

©Copyright - All Rights Reserved

DO NOT REPRODUCE WITHOUT WRITTEN PERMISSION BY AUTHOR.

Related articles

Mechanical-Safety-Engineering-Logo.gif

7/27/2015· Engineering

Forensic Clues: Principles of Engineering Design

By: John Ryan, BSME, PE

The nursery rhyme involving Humpty Dumpty is a child's first lesson in safety. What would keep Humpty Dumpty safe as he is sitting on the wall? A warning or a railing?

ewen-todd-photo1.jpg

8/26/2014· Engineering

Outbreaks Where Food Workers Have Been Implicated in the Spread of Foodborne Disease. Part 10. Alcohol-Based Antiseptics for Hand Disinfection and a Comparison of Their Effectiveness with Soaps

By: Dr. Ewen Todd

Alcohol compounds are increasingly used as a substitute for hand washing in health care environments and some public places because these compounds are easy to use and do not require water or hand drying materials. However, the effectiveness of these compounds depends on how much soil (bioburden) is present on the hands. Workers in health care environments and other public places must wash their hands before using antiseptics and/or wearing gloves. However, alcohol-based antiseptics, also called rubs and sanitizers, can be very effective for rapidly destroying some pathogens by the action of the aqueous alcohol solution without the need for water or drying with towels.

Dick-Beaubien-Transportation-Engineer-photo.jpg

3/14/2016· Engineering

Reflecting on Engineering Practice

By: Richard Beaubien

When I was a boy, playing in the sandbox or building with blocks, I dreamed of building cities. I feel fortunate to be in a profession which allows me to fulfill that dream. To enjoy your job is a more important measure of success than the amount of money in your bank account. My favorite definition of success is borrowed from Ann Landers:

;
Experts.com-No broker Movie Ad

Follow us

linkedin logo youtube logo rss feed logo