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An educational blog sponsored by Classic Controls focusing on education and training for the process control, instrumentation, and industrial valve community.
There are several industrial control valves, each with unique characteristics and uses. Some common types of control valves include:
Globe valves: Globe valves are typically used for regulating flow in pipelines and are known for their ability to handle high-pressure systems. They consist of a disk that moves up and down to block or allow flow through the valve. Industrial globe valves are mechanical devices that are used to regulate the flow of liquids or gases in a pipe. They consist of a cylindrical body with a disk-shaped element, called the plug or disc, that moves up and down to open and close the valve. The disk is connected to a stem, which is operated by a handwheel, lever or pneumatic or electric actuator. When the stem is turned, it raises or lowers the disk, allowing for the flow of fluid through the valve. Globe valves are typically used in industrial settings, where precise control over the flow of fluids is important. They are known for their durability and reliability and are often used in applications such as steam systems, water treatment plants, and chemical processing facilities.
Butterfly valves: Butterfly valves are used for controlling the flow of fluids in pipelines. They consist of a disk that rotates to block or allow flow through the valve. They are known for their low cost and ease of installation. Butterfly valves are a type of industrial valve that are typically used to regulate the flow of fluids, such as gases, liquids, and slurries, in a pipe. They are called butterfly valves because the mechanism that controls the flow of the fluid is a disc that is mounted on a shaft and rotates like a butterfly's wings.
Some of the key characteristics of industrial butterfly valves include:
Diaphragm valves: Diaphragm valves are used for controlling the flow of fluids in pipelines. They consist of a flexible diaphragm that moves to block or allow flow through the valve. They are often used in applications where the fluid being controlled is corrosive or dirty. Industrial diaphragm valves are valves that use a flexible membrane to control the flow of liquids or gases. The membrane is typically made of rubber or another flexible material and is positioned between the valve body and the valve seat. When the valve is open, the membrane flexes to allow the flow of fluid, and when the valve is closed, the membrane seals against the valve seat to stop the flow. Diaphragm valves are commonly used in industrial piping systems for a variety of applications, such as controlling the flow of chemicals, water, steam, and other liquids and gases. They are often used in situations where the fluid being controlled is corrosive or abrasive, as the flexible membrane helps to prevent damage to the valve body.
Plug valves: Plug valves are used for controlling the flow of fluids in pipelines. They consist of a plug that rotates to block or allow flow through the valve. They are known for their ability to handle high-pressure systems and are often used in applications where the fluid being controlled is viscous. Industrial plug valves are a type of quarter-turn valve that is used in various industrial applications to control the flow of liquids and gases. They are named for the plug-shaped component that is used to open and close the valve. Some of the key characteristics of industrial plug valves include:
Each type of control valve has its own unique advantages and disadvantages, and the best type of valve for a particular application will depend on the specific requirements of the system. Discuss your control valve requirements with professional, skilled application engineers. Classic Controls is available to assist in the application and specification of any valve application for any industrial or commercial process. Call them at 863-644-3642 or visit their website at https://classiccontrols.com.
In many industries, the atmosphere, though safe to breath, may be unsafe for an electrical spark. These areas often have pneumatically operated equipment for safety. And that equipment needs a source of clean dry air or as it is called in the industry, Instrument Grade Air. Plants typically have a centralized instrument grade air line that delivers air to the instruments that need it. However, oftentimes the instrument grade air is of inferior quality and contaminated with water. This air will benefit from a point of use drying system that guarantees instrument grade air. Traditional drying systems using PSA (Pressure Swing Adsorption) or refrigerant require expensive modifications to operate within hazardous areas. Air dryers made from hollow fiber membranes can dry compressed air without the use of electricity and are therefore safe for hazardous environments.