Inst Tools - Instrumentation, Electrical, PLC Tutorials

Control Valve Failure Rate Calculation

Suppose a control valve manufacturer produces a large number of valves, which are then sold to customers and used in

Suppose a semiconductor manufacturer creates a microprocessor “chip” containing 2500000 transistors, each of which is virtually identical to the next

In reliability engineering, it is important to be able to quantity the reliability (or conversely, the probability of failure) for

The relatively simple concepts of AND and OR Boolean functions become surprisingly complicated when applying them to real-life measures of

While the term “probability” may evoke images of imprecision, probability is in fact an exact mathematical concept: the ratio a

A troublesome phenomenon in severe services is the audible noise produced by turbulence as the fluid moves through a control

A problem common to control valves used in slurry service (where the process fluid is a liquid containing a substantial

Fluid passing through a control valve experiences changes in velocity as it enters the narrow constriction of the valve trim

When a fluid passes through the constrictive passageways of a control valve, its average velocity increases. This is predicted by

The root cause of the problem – a varying pressure drop caused by frictional losses in the piping and other