Power Generation

Below you will find white papers on topics involving process control and automation.

Rising Stem Valve vs. Rotary Valve

Submitted by Dr. Jon Monsen

This white paper discusses the rising stem valve and compares it to the rotary valve. The reader will learn what to consider to ensure the lowest overall life cycle cost and best possible degree of process control.

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Filtration in Peaker Plants

Submitted by Greg Neneman, Valin Corporation

Proper filtration has always been a critical component of operating an efficient power plant. Surprisingly, however, staying up to date on filtration maintenance is all too often ignored in todays typical plant. Additionally, the modern plant continues to evolve. Read Valin's white paper to learn more about filtration in peaker plants and why ensuring proper ammonia filtration means more now than it ever has before.

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Using Input and Output Filters on Watlow Multi-Channel Controllers

Submitted by Watlow

The use of INPUT/OUTPUT software filters can provide enhanced performance of controllers to process systems conditions. The use of Input filters are to reduce the erratic fluctuations of the analog input signal due to either electrical noise conditions or rapid fluctuations of the analog input signal. It accomplishes this by slowing down the response of the analog input to a change.

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When to Select a Limit, Versus an Alarm Controller

Submitted by Watlow

In Watlow catalogs, brochures and web pages there is a category of controllers listed as Limits and Alarms. It is not always clear to everyone when to use these controllers or which type of controller to use. This document is an attempt to clear up some of these issues.

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Calibration of Watlow Controllers

Submitted by Watlow

Occasionally questions come up with regard to calibration of Watlow controllers. This paper will attempt to address some of the more common questions on this subject. Many people want to jump in right away and begin performing a calibration procedure before verification. Before you would attempt to calibrate a Watlow controller, verify that the controller is in need of calibration. If you verify that readings of the controller first, you may not have to go through the more involved process of ch...

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Developments in Stainless Steel Instrumentation Tube Fittings

Submitted by Parker

This article discusses the evolution of ferrule design and hardening technology, using the example of the Parker Hannifin CPI™ single ferrule compression fitting, but the basic principles also apply to two ferrule compression fittings, such as Parker Hannifin's A-LOK®, as well as the high pressure design.

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Choosing Two-LEG vs Three-LEG Control for 3-phase Applications

Submitted by Watlow

Customers who wish to control three phase heaters require power controllers. How do you decide which method of control to select? Two-leg versus three-leg control and zero cross versus phase-angle control need to be considered. The following will help you decide when each method is appropriate.

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Controls Integration White Paper

Submitted by Watlow

In today's world, there is an ever increasing awareness and focus on safety. A system designer needs to understand all aspects of design that can affect the safety and reliability of the system they are implementing.

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Choosing the Correct Chemical Metering Pump for your Application

Submitted by Mike Price || Walchem

Selecting the correct chemical metering pump can be a daunting task because of the variations and types of chemical pumps available. In order to pick the best metering pump for the application you will need to consider several factors. For the sake of simplicity, we will limit our discussion to pumps that deliver no more than 50 gph and pressures of less than 250 psi.

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Taking Fluid Cleanliness to the Next Level with Permanent Offline Filtration

Submitted by Des-Case

In recent years, portable filtration units, often referred to as filter carts, have become a common tool in the lubrication professional's arsenal. Increasing demand for these systems has led to the development of a wide range of new products and driven down prices, which is a good thing. When filter carts first came onto the scene they were primarily used by service providers for decontaminating large systems. These early models were typically designed for low viscosity oils in large volume sys...

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Three Key Factors to Create Leak-Free Fitting Assemblies for Fluid Processing Applications

Submitted by Fit-LINE

Operational efficiency is a critical factor in the fluid processing industry. The synergy of fitting components and assembly technology to achieve this objective is the focus of Fit-LINE, Inc. Applying extensive polymer technology and injection molding expertise, the company has analyzed the design, tooling and manufacturing processes required to create high-performance solutions for demanding high-purity fluid processing applications. Through extensive R&D, testing and evaluation, Fit-LINE ...

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Filter Ratings

Submitted by Tim Tritch

The purpose of a filter is to remove contaminants from a fluid stream either completely, or at least down to a given rating or specification. Filters are used to help control contaminants and are rated according to their ability to remove these contaminants from a liquid, gas or air stream. There are different methods in which the performance of filters are specified.

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Valve Aerodynamic Noise Reduction Strategies

Submitted by Jon Monsen, Ph.D., Valin Corporation

There are two strategies for reducing control valve noise:

1. Source control, that is doing something to the valve to make it less noisy, and

2. Path control, that is doing something to prevent the noise from reaching the people who would be bothered by it.

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Choose the Correct Level Sensor

Submitted by Brian Sullivan

Answer a number of key questions to identify the most appropriate choice

At process plants, a significant percentage of measurement devices aren't correctly matched to their application, leading to decreased quality and consistency of the operation. Often, the source of this problem is the assumption that one type of level measurement sensor suits multiple applications.

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