Process measurement and control employs a wide array of gauges and instruments that may be permanently or temporarily connected to a piping system. Providing controlled isolation and connection of these instruments is the function of what is generically referred to as “instrument valves” or “gauge valves”. These valves are generally small, with connection sizes ranging from 1/8″ to 1″, though there are specialty variants outside this range. The predominant valve type is a needle valve, but ball valves and some other types are also used. Certain attributes of particular applications may weigh a selection decision toward a valve type. Widely used throughout the process industries, instrument valves are often designed to accommodate pressures as high as 6000 PSI and are intended for service with gaseous or liquid service.
When selecting instrumentation valve suppliers, consider construction materials that are compatible with the process media. Ball valves in this class do not provide the throttling accuracy of a needle valve but may provide some advantage with the use of certain media. The ball valve design, with its full-size port, enables easier cleaning and a lessened potential for clogging.
Configurations of Instrumental Valves
There are three basic configurations of instrumentation valves:
Some instrumentation valves supplied are designed to protect people, property, and processes. Also, the term safety valve refers to a failsafe, last resort valve that will release pressure to prevent a catastrophe, in the event that all other valves have failed to control pressure within a system.
Why are instrumental valves essential?
A butterfly valve is a rotary movement valve used for on/off flow control and especially in throttling applications. Ball valves are related to plugging valves and are used in situations where tight shut-off is required. Ball valves are rotational motion valves and are used for on/off and throttling service.
The instrument valve consists of Ball valves, needle valves, plug valves, pinch valves, diaphragm valve, gate valve, butterfly valve, and globe valves. Above is all the data explaining what instrument valves do, their benefits as well as their applications.