Industrial valve types and applications the eagle group. Different types of valves with pdf file engineering. To make your selection easier, nibco offers specification and submittal assistance. The gate acts like a shutter that separates the inside of a house from the outside or a door that separates two rooms. Globe valve, gate valve, butterfly valve, check valve, ball valve, disk valve, diaphragm valve, linear valve,rotary valve. Check valves are used in systems employing gate valves because they prevent the reversal of flow in the piping system and there is a low pressure drop across the valve. Wear in the bores for the poppets of the valve guard can limit its lifetime.
Gate valves are widely used for all types of applications and are suitable for both. The knife gate valve is different from other gate valves in that the gate is not totally enclosed within the body, see figure 3. Control valves are an increasingly vital component of modern manufacturing around the world. They are designed such that if the air supply fails, the control valve will be either fully open, or fully closed, depending upon the safety requirement of the process. Ball valves are made with a rotating sphere that has a hole in it.
The gate valves are delivered with a handwheel, a manual bevel gear, an electric actuator or. Classification of valvesthe following are some of the commonly used valve classifications, based onmechanical motion. Aerosol valves are used for dispensing the contents of aerosol cans. Different types of valves used in piping mech4study.
In service, these valves are either in fully open or fully closed position. Control valves are available in different types and shapes. In such a design, a wedge slides cross a general passageway in order to control fluid flow like a sliding gate hence, the name. The closure member of gate valves either stops or allows flow through the valve and acts somewhat like the opening or closing of a gate. Most valves employ a threaded stem to move the flow element. One of the most significant characteristics of this type of valves is its. Since the ball moves across the seats in a wiping motion, ball valve is an excellent and cheapest shut off device for dn50 and lesser chw pip. Plumbing valves are controlled liquid passes from one pipe to another, can be found throughout a home. Avk offers gate valves with bypass in dimensions from dn 450, see series. A valve which is used for cleaning sludge from a boiler. The following valve types represent the most commonly seen valve types used in industrial applications around the world. The pressure of the fluid through the system opens the system, while the weight of the check mechanism will close the valve if the flow is reversed.
Ranging of the gate valves is usually made by the type of wedge used. Our company can offer customized valves service according to your requirement too. The following article will cover the general mechanism and function of the most typical of these valves used in steam systems, such as ball valves, butterfly valves, globe valves, gate valves, and diaphragm valves. Gate valve types, construction, applications and advantages. Learn about 9 different types of valves used in piping such as gate valve, globe valve, check valve, plug valve, ball valve, butterfly valve, needle valve, pinch valve and. The parallel gate valves use a flat gate between two parallel seats, and a popular type is the knife gate valve designed with a sharp edge on the bottom of the gate. Based on function of valves i isolation type valves. Gate valves are available with different disks or wedges. Although there are exceptions, such as safety valves and check valves, most valves have stems that extend to the outside of the valve. A third type of gate valve, called conduit valve, is shown in fig. Control valves operated through pneumatic actuators can be either. Ideal for quick shutoff, since a 90 turn completely shutsoff, compared to multiple 360 turns for other manual valves. Many different types of manual valves are used in industrial applications worldwide.
In the 19th century, intensive development of gate valves moved quickly. Important gaskets used are nonmetallic, spiralwound and ringjoint type fig. Gate valves should not be used in the regulation or throttling of flow because. They are used for steam, water, oil, gas, and chemical liquid service. They are mechanical seals, generally ringshaped type and fitted for sealing flange joints. A gate valve is the most common type of valve that used in any process plant. Knifegate valves should never be used in a restrictive role ie half open as the base of the knifegate will wear rapidly and not seal properly when closed. Cannot be used as a pipe end or as end of line service. Types of manual valves tlv a steam specialist company. The wedgeshaped gate valves use two inclined seats and a slightly mismatched inclined gate.
Types of gate valve and parts a complete guide for engineer. As a chinabased gate valve factory with over 15 years api certification, we offer wide range gate valves in various materials like cast steel, stainless steel and forged steel etc. Each of these types has a number of models, each with different features and functional capabilities. Types of industrial valves applications, advantages, and. Rotate a disc or ellipse about a shaft extending across the diameter of an orifice for example, a butterfly or ball valve. Types of valves classification and description valvias. Ball valve, for onoff control without pressure drop. There are several different types that are typically used in pipelines, some of the most popular include balls, butterfly, check and gate valves.
To select the correct valve to fulfill these functions properly, an outline of the different types of valves and their features is given below. Nov 04, 20 gate valves come in a few different varieties that include rising stems or nonrising stems, and they can also come with solid wedges, flexible wedges or split wedges. May 22, 2018 learn about 9 different types of valves used in piping such as gate valve, globe valve, check valve, plug valve, ball valve, butterfly valve, needle valve, pinch valve and pressure relief valve. Different types of valves used in piping a complete guide. The following article will cover the general mechanism and function of the most typical of these valves used in steam systems, such as ball valves, butterfly valves, globe valves, gate valves, and diaphragm valves according to jis, a valve is defined as. The most common applications in valves are, for stem material in butterfly valves, and trim components such as seat, backseat bushings, discs, wedges etc.
Valves can be categorized into the following types, based on their operating mechanism. What is difference between api 6d and api 600 for design. Gate valves are multipurpose bidirectional shutoff valves for commercial and industrial applications. They are 2way inlet and outlet, 2position open and closed valves that are used for shutoff or isolation of a system, or a loop or component within a system. Valves are quite diverse and may be classified into a number types. Gate valve, ball valve, plug valve, piston valve, diaphragm valve, butterfly valve, pinch valve. A gate valve can be defined as a type of valve that used a gate or wedge type disk and the disk moves perpendicular to flow to start or stop the fluid flow in piping.
Nevertheless, in some applications, specially designed plugs are. Classification of gate valves is usually made by the type disk used. Different types of control valves instrumentation tools. They are specially developed for applications where a lowpressure loss is essential. The valves are suitable to mounting between weld neck or slip on type companion flanges of different standards. A motorized valve is one which opens or shuts by remote means, typically an electric, pneumatic, or hydraulic actuator.
Regulates the flow of fluid depending upon the necessity. Furthermore, each of these valves comes in many sizes, con. Some valves are capable of throttling flow, other valve types can only stop flow, others work well in corrosive systems, and others handle high pressure fluids. Different types of valve bodies bonnets and wedges 7. When raised, the gate clears the channel and allows flow. The principle is simply a knife or gate which is dropped in front of the flow. Types of valve used in piping learn about 9 types of valves. Gate valves are linear motion devices used open and close the flow of the fluid shutoff valve. Types of valves and their applications aerosol valves. Slide a flat, cylindrical, or spherical surface across an orifice for example, gate and plug valves. This is the simplest design available and it is used for.
Gate valve manufacturer china valve industrial valve. Industrial valves are built to handle high pressure, either from fluid or gas, and to last through years of use in harsh environments. A gate valve consists of a channel that can be opened or closed by moving a metal gate up and down. Oct 26, 2016 the most common applications in valves are, for stem material in butterfly valves, and trim components such as seat, backseat bushings, discs, wedges etc. Features two or more centering holes to help with installation. Types of check valves different check valves types of.
A rotating stem provides movement for nonrisingstem gate valves, ball valves, rotatingdisc gate valves, butterfly valves, and most plug valves. They consist of two primary components, the housing and the stem. Opening and closing of the valve will take place at an extremely lowpressure difference over the valve disc. Gate valves cannot be used for throttling applications, i. Types of check valves different check valves inst tools. Valve types and configurations gate valves kitz corporation. Most of avks gate valves are of the solid wedgeshaped design, but we also offer knife. Types of gate valve based on body, bonnet connection. Valves guide valves are mechanical devices that controls. Plug valves, also called cocks, generally are used for the same fullflow service as gate valves, where quick shutoff is required. A closer look at 10 different types of valves world wide. Ball valves are quarter turn valves, commonly used for bidirectional isolation applications.
This type is the most used in piping and pipeline applications. It is a linear motion valve used to start or stop fluid flow. Ball valves quarterturn 2way ball valves are by far the most common type of process control valve. Ball valve, butterfly valve, plug valve, spherical. Pressure binding sometimes in hightemperature applications, the flow medium, such as water or steam, is trapped in the valve bonnet area when the valve is closed for system shutdown. Types of valves and their applications and selection criteria. Each type of valve has been designed to meet specific needs. Bfe reserves the right to change designs, dimensions or specifications w ithout notice. Gate valves are used in almost all fluid services such as air, fuel gas, feedwater, steam, lube oil, hydrocarbon, and all most any services. Gate valve is the most common type of valve in any process plant.
Most often considered isolation, or onoff valves, gate valves have been around for decades. In this article, i have covered classifications of valves and functions of valves. Classification of control valves valve types different. Glands cannot be of screwed or union types and are always bolted. The following types of valves are used in a variety of applications, these descriptions may provide a basic guideline in the. Move a flexible material into the flow passage for example, diaphragm and pinch valves.
Valves common types knifegate valves often just called gate valves, these are used as isolation valves. An automatic type of air valve preventing the formation of vacuum in tanks or pipelines. The control valve handbook has been a primary reference since its first printing in 1965. The pros and cons of each type are identified below. Gate valves come in a few different varieties that include rising stems or nonrising stems, and they can also come with solid wedges, flexible wedges or split wedges.
Properly selected and maintained control valves increase efficiency, safety, profitability, and ecology. The control valves are basically classified into two types. Gaskets are made as per by construction, materials and features. Get the assurance of the nibco warranty, along with superior customer service expertise. Valve types and features the three basic functions of valves are. Some valves are selfoperated while others manually or with an actuator or pneumatic or hydraulic is. Plug valves types, construction, applications and advantages. A flange joint is a plate or ring to form a rim at the end of a pipe when fastened to the pipe. A valve in which a ball is free to rotate in any direction. Aug 30, 2019 plumbing valves are controlled liquid passes from one pipe to another, can be found throughout a home. There are a number of different plumbing valves used to control the flow of water in a building.
Gate valves standard configurations basic cryogenic bellow seal gate valve description gate valves are primarily designed for onoff services when a straightline flow of fluid and minimum restriction is desired. The different motorized valves include the gate, ball, butterfly, and globe variants, each having its own advantages and specific areas of use. In addition, they are typically operated in a fully open or fully closed position with minimal restriction and obstruction through the borebody. Two basic types of gate valves are the manufacturedwedge type and the doubledisc type, and there are several variations within each of these types. Two basic types of gate valves are the manufacturedwedge type and the. This job is easier than it is for the plate and ring type valves. The packing seals the gate itself against the body. Gate valve, globe valve, fixed cone valve, needle valve and pinch valve. Spec a job, find your distributor, get catalogs and submittals, place. Valve is a device that regulates, controls or directs the flow of a fluid by opening. Splitwedge or flexiblewedge type gate valves are expected to perform better than solidwedge gate valves when thermal binding is a concern. Plug valves are not generally designed for the regulation of flow.