What Are Instrumentation Valves?

The instrument valve is a piping accessory. There are many instruments and valves on the market, and how to select high-quality products from them requires more knowledge. In this article I will take you through the different types of instrument valves.

Introduction to instrument valves

The universal instrument valve is made of stainless steel. It is a device used to change the cross section of the passage and the direction of medium flow, and control the flow of the conveying medium. The sealing performance of the instrument valve refers to the ability of each sealing part of the instrument valve to prevent medium leakage. It is the most important technical performance indicator of the instrument valve. There are three sealing positions of the instrument valve: the contact between the opening and closing member and the two sealing surfaces of the valve seat; the combination of the packing with the stem and the stuffing box; the previous leak is called internal leakage, which is commonly referred to as improper closing. It will affect the ability of the instrument valve to cut off the medium. For shut-off valves, internal leakage is not allowed. The latter two leaks are called external leaks, that is, the medium leaks from the inside of the valve to the outside of the valve. Leakage can cause material loss, pollute the environment, and cause accidents if it is serious. For flammable, explosive, toxic or radioactive media, leakage is not allowed, so the instrument valve must have reliable sealing performance.

Various types of instrument valves

According to the role of instrument valves, instrument valves can be divided into the following categories:

According to the purpose, it can be divided into: shut-off valve, check valve, safety valve, regulating valve and diverter valve.

According to the different nominal pressures in use, it can be divided into: vacuum valve, low pressure valve, medium pressure valve, high pressure valve, ultra high pressure valve.

According to the working temperature classification during normal use, it can be divided into: ultra-low temperature valve, low temperature valve, normal temperature valve, medium temperature valve, high temperature valve.

According to the different braking methods, it can be divided into: automatic valve, automatic valve (safety valve, pressure reducing valve, trap, check valve, automatic regulating valve); drive valve. The drive valve can also be divided into electric valve, pneumatic valve, hydraulic valve and manual valve according to different power sources.

According to the diameter of the fluid passing through the instrument valve, it can be divided into: small diameter instrument valve, medium diameter instrument valve, large diameter instrument valve, extra large diameter instrument valve.

According to the different structural shapes of the instrument valve, it can be divided into: gate, plug, plug valve, swing valve, butterfly line, slide valve line.

According to the different connection methods of instrument valves and other pipe fittings, it can be divided into: threaded instrument valves, flange-connected instrument valves, welded instrument valves, clamp-connected instrument valves, clamp-connected instrument valves, and wafer-connected instrument valves.

According to the materials used in the manufacture of instrument valves, it is divided into metal instrument valves, non-metal material instrument valves, and metal valve-lined instrument valves.

There are too many types of instrument valves, and there may be other classifications, but they are still suitable for industrial pipelines.

Instrument valves have different functions and various types. You can purchase the corresponding valve according to your needs. Knowing the relevant knowledge of instrument valve can make you handy before and during the purchase.