A sliding-stem valve body is one where the moving parts slide with a linear motion. Some examples of…
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An on/off valve is the fluid equivalent of an electrical switch: a device that either allows unimpeded flow or…
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The following collection of photographs chronicles the complete disassembly of a Fisher E-body globe valve…
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Creative Commons Attribution 4.0 International Public License By exercising the Licensed Rights (defined…
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Some problem-solving techniques are unique to quantitative problems, involving mathematical calculations. In…
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Disconnect Switches Disconnects are switches designed to isolate sections of a power system in case of damage…
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A sliding-stem valve body is one where the moving parts slide with a linear motion. Some examples of…
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Valve actuators provide force to move control valve trim. For precise positioning of a control valve, there…
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A machine in the broad sense of the word is any device designed to translate some form of energy into useful…
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The disadvantages of pneumatic instruments are painfully evident to anyone familiar with both pneumatic and…
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To better understand the design and operation of self-balancing pneumatic mechanisms, it is helpful to examine…
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Perhaps the most important rule of controller tuning is to know the process before attempting to adjust the…
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The following collection of photographs chronicles the complete disassembly of a Fisher E-body globe valve…
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A fluid is any substance having the ability to flow: to freely change shape and move under the influence of a…
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As we have seen, the concept of integration is finding the accumulation of one variable multiplied by another…
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Self-balancing mechanisms consisting solely of a baffle/nozzle detector coupled to a feedback bellows, while…
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An important design parameter of a control valve is the position it will “fail” to if it loses…
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This section shows some of the many instrument symbols found in different types of technical diagrams used to…
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A damper (otherwise known as a louvre) is a multi-element flow control device generally used to throttle large…
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When a high-energy photon strikes an atom, it may eject one of the lower-level electrons from its shell,…
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Multiple accessories exist for pressure-sensing devices to function optimally in challenging process…
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Some analyzers measure the composition of a process stream by directly immersing the sensing element in that…
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A different strategy for controlling the flow of fluid is to insert a rotary element into the flow path.…
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The dispersion of visible light into its constituent colors goes all the way back to the 17th century with…
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Circuit breakers used in residential, commercial, and light industrial service are self-tripping devices: they…
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To better understand the design and operation of self-balancing pneumatic mechanisms, it is helpful to examine…
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The very purpose of physics is to quantitatively describe and explain the physical world in as few terms as…
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In November of 2007 a new computer virus was submitted to a virus scanning service. The purpose of this new…
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When I began teaching full-time in 1998, most of what I thought I understood about good teaching was actually…
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Any power grid large enough to meet the demand of an entire nation must have multiple generators drawing from…
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A very common method for directly controlling low flow rates of fluids is to use a device known as a metering…
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In this section I will show screenshots from a process loop simulation program illustrating the effectiveness…
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Perhaps the most important rule to obey when using pneumatic instruments is to maintain clean and dry…
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All masses require force to accelerate (we can also think of this in terms of the mass generating a reaction…
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(Will be addressed in future versions of this book)
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Every programmable logic controller must have some means of receiving and interpreting signals from real-world…
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Cyber-security seems to have its own vocabulary, ranging from unwieldy technical acronyms to slang terms…
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Diagnostic ability is arguably the most difficult skill to develop within a student, and also the most…
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A variety of problem-solving techniques have been presented for students over the years which are all helpful…
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Much has been written about the benefits of robust PID control. Increased productivity, decreased equipment…
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Learning is not merely a process of information transfer. It is first and foremost a transformation of…
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Any physical location in an industrial facility harboring the potential of explosion due to the presence of…
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A machine in the broad sense of the word is any device designed to translate some form of energy into useful…
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