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Process Control Fundamentals

Process Control

In almost all industrial process applications, control of process variables is critical to the safe and efficient operation of the process. The most common variables controlled are pressure, level, temperature, and flow. Even though there are many different methods used to control these processes, this monitoring and control is generically called process control. Level, pressure, temperature, and flow are all controlled in a Read more…

Powerful Training

Technology Transfer Services is pleased to announce our complete list of dates for open enrollment training in 2014 at our Houston training facility. For additional information, contact sales@techtransfer.com.

Month Date Topic
April 22nd – 24th Planning and Scheduling
July 15th – 17th Hands on Process Instruments for Engineers
September 23rd – 25th Combined Cycle Heat Rate
October 21st – 23rd Controllogix

Control Valve Basics – Types

Valves are used for thousands of purposes, from simple and mundane tasks, such as turning on the water in a kitchen sink, to tasks as important and difficult as controlling water flow through a nuclear Read more…

In: Blog 26 Mar 2013 Tags: , , , ,

Control valves must be selected for their intended application, and advantages must be weighed against limitations to ensure that the correct valve is selected. Different valve types are suited to perform different duties while valve characteristics, including fluid flow, shut off, and noise, can be manipulated by choosing specific valve components. When installing a control valve in a location where it may encounter extreme conditions, such as cryogenic temperatures or high differential pressures, proper valve assemblies should be specified to handle anticipated conditions.

The type of control valve chosen for a specific application will depend on the anticipated conditions and service. For instance, when slurry or entrapped solids are expected to flow through a control valve, a knife-type gate valve can be used, due to its ability to slice through foreign objects in the fluid, and thereby offer tight shut-off. While knife-type gate valves offer good sealing capabilities, they would not fare quite as well when called upon to throttle that flow due to the inherent vibration of the gate at partially open conditions. Advantages and disadvantages of each type of valve must be considered to select the proper type for the intended application. Read more…