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Predicting Cavitation Damage in Control Valves

Cavitation can occur when the pressure of the process media changes as it passes through a control valve, resulting in increased noise and possible damage of the valve....

Predicting Cavitation Damage in Control Valves

Cavitation can occur when the pressure of the process media changes as it passes through a control valve, resulting in increased noise and possible damage of the valve.

How Steam Conditioning Valves Improve Your Process

Steam Pressure and Temperature control – In one unit.

Improved Control Valve Sizing for Multiphase Flow

Process media in the chemical and petrochemical industries can be comprised of a gas/vapor and liquid phase as it enters a control valve. This article examines the calculations for sizing control valves that are used in such processes.

Safety in the Process Industry

Human error and technical failures have caused some of the worst chemical and petrochemical accidents. This article responds to the changing responsibilities and roles of the many entities involved in preventing such accidents.

Partial Stroke Testing for Final Elements

Partial stroke testing means partial movement of the safety valve without interfering with the operation process in any way.

Control Valves with Extremely Fast and Precise Positioning Capabilities

Some industrial processes, such as the Parex™ process in the petrochemical process or compressor bypass control in the energy sector, need valves with quick and precise acting movements. This article examines those processes and the control needs

Enhanced Reliability for Final Elements

Process valves can be the most decisive factor for measuring and calculating the SIL Level for the safety instrumented function (SIF).

Control Valve Design Aspects for Critical Applications in Petrochemical Plans

In the oil and gas market sector, many valves are high power [∆p x flow] converters and in combination with fluid corrosion and fluid contamination the valve body and trim may be parts subject to wear.

Diagnostic Tools for Control Valves

Digital positioners offer features regarding improved process plant reliability and maintenance.

Cutting Costs Using Self-Operated Regulators

Self-operating regulators have existed for over 100 years to control temperature and pressure of process media. This article outlines how cost effective these regulators can be.

Seat Leakage Detection

Seat leakage may not be detected from the outside of a valve if the tight shut-off is impaired causing deterioration of control.  This article examines how uncovering seat leakage can be done using appropriate sensors.

Plant Design and Control Valve Selection Under Increasing Cost and Time Pressure

Designing plants under current time constraints has proved difficult for engineers possibly resulting in "quick and dirty" sizing of control valves.

Control Valves for Critical Applications

In refineries the process media flowing through valves are primarily liquids. With liquids, critical operating conditions caused by cavitation or flashing may occur.

Implementation of Safety-Instrumented Systems in the Process Industry – SIL in Practice

Standards for handling safety-instrumented systems have become widely accepted, but when to implement them in daily operations can lead to uncertainty.