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. The mechanical characteristics make the scv wedge gate valve are ideal for bidirectional total flow system openshutoff applications with minimal. Using an internal screw type nonrising stem may disable opening and closing. Check valve is used to stop back flow in a piping system. Unit 571 new smyrna beach, fl 32128 386882ezce3923. Commonly used in industrial piping for stop or isolating to turn on and shut off the flow as opposed to regulating flow. Types of gate valve and parts a complete guide for engineer. Jun 25, 2018 learn about different types of valves that used in piping in hindi.
Here is a list of symbols for various types of valves used in process industry. Get the assurance of the nibco warranty, along with superior customer service expertise. In case of gate valves equipped with an electric actuator or a pneumatic actuator, must you follow instructions of the manufacturer of actuators. Valves for api temperature ratings of x and y are pressure. These valve types are commonly used for flow control applications. This is the simplest design available and it is used for inexpensive valves. Common types knifegate valves often just called gate valves, these are used as isolation valves.
The valve trim consists of the stem, the gate, the wedge, or disc, and the seat rings. A manual gate valve is a handoperated valve that uses a wheel or gear to open and close media flow. With stem square cap with handwheel a sealing types. The gate design is always of the through conduit type incorporating an aperture the same diameter as the valve bore. Gate valves are multipurpose bidirectional shutoff valves for commercial and industrial applications. Gate valve, globe valve, fixed cone valve, needle valve and pinch valve. Flow is blocked by using the wedgelock effect of the valves disc. Fl api 6a slabstyle gate valve schlumberger products. Ball valve, butterfly valve, plug valve, spherical. Gate valves are sometimes used for regulating flow, but many are not suited for that purpose, having been designed to be fully opened or closed. The valve guard, poppets, springs and wear shims are conventional. A gate valve is the most common type of valve that used in any process plant.
In the fully closed position, gate valves provide a positive seal under pressure. This is the most popular design and used in a large number of gate valves. The principle is simply a knife or gate which is dropped in front of the flow. A third type of gate valve, called conduit valve, is shown in fig. When the gate valve is laid underground or it exposes with concrete fig. Multiturn rising stem valves move the obstructer by the rotation of a threaded rod stem which is attached to the obstructer examples of multiturn valves are gate valves, globe valves, pinch valves, diaphragm valves, and needle valves. Following is a section describing the disassembly procedure for the various valve components. Spacer ring in conjunction with packing is used in gate valves of 300 class and above while 150class valve is only fitted with packing. Model csr gate valve for actuators 14 omni gate valves. In the above chart, you can see the types of valves and their function. Gate valves are used in many industrial applications including the oil and gas industry, pharmaceuticals, manufacturing, automotive, and marine. Types of valves classification and description valvias.
Different types of valves with pdf file engineering. The gate acts like a shutter that separates the inside of a house from the outside or a door. Isolation valve isolates or cuts the supply of fluid when needed. Fundamentals of valves and their types instrumentation tools. Globe valve inlet and outlet openings are arranged in several ways to suit varying.
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. It has served the industry with distinction for many years across a range of application types worldwide and is well tested, both in assembly and component qualification testing. The bolted bonnet joint design valve uses a contained, controlled compression, spiral wound type gasket. Valve is a device that regulates, controls or directs the flow of a fluid by opening. They are operated by a threaded stem which connects the actuator generally a hand wheel or motor to the stem of the gate. Slab gate valve slab gate valve outside screw this valve has a single parallel faced slab gate, which slides over floating seats. While they all perform the same function of connecting the valve into the piping system and allowing it to perform its function, each connection type has its own pros and cons. To make your selection easier, nibco offers specification and submittal assistance. Spec a job, find your distributor, get catalogs and submittals, place.
Many different types of manual valves are used in industrial applications worldwide. 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. Valve types and configurations gate valves kitz corporation. Gate valves require very little space along the pipe axis and hardly restrict the flow of fluid when the gate is fully opened. Gate valves can be used in demanding environments such as high temperature and high pressure environments. Gate valves gear operated bare stem for actuation 2 piece bonnet design 4 pdf machine is a pdf writer that produces quality pdf files with ease. Chapter 4 describes digital valve controllers, analog positioners, boosters, and other control valve accessories. Class 150 gate valves consist of a square joint in 2 and an oval one for all other sizes. The fl gate valve is the standard product offering for 5,000psi 34. Downstream sealing slab gate valve upstream and downstream sealing slab gate valve the latter design may be used to provide double isolation in which the gate is free to float on the end of the stem, but operating forces are higher than for.
Knife valve, similar to a gate valve, but usually more compact. High quality packing for reliable tightness and low emission performance. Thus it is used either in the fully closed or fully open positions. Chapter 6 addresses the selection and use of special control valves. There are many valve designs and types that satisfy one or more of the functions identified above. Class 300 and 600 valves consist of a circular spiral wound gasket.
Classification of gate valves is usually made by the type disk used. Types of gate valve based on body, bonnet connection 1 st is screwed bonnet. Two basic types of gate valves are the manufacturedwedge type and the doubledisc type, and there are several variations within each of these types. Types of valve used in piping learn about 9 types of valves. Butterfly valve butterfly valve and globe valve butterfly valve and ball valve butterfly valve and gate valve check valve gate valve globe valve ball valve valve shaped like a. It is made from stainless steel, carbon steel, brass, cast iron, and certain types of plastic. Gate, ball, plug, piston, diaphragm, butterfly and pinch valve falls under this category. Depending on the valve service it can be supplied flatface gasket with graphite or ptfe. Pinch valve, for slurry flow regulation and control. The seat rings are steel and makeup part of the valve trim.
A gate valve, also known as a sluice valve, is a valve that opens by lifting a barrier gate out of the path of the fluid. Globe valve, gate valve, butterfly valve, check valve. The globe valve derives its name from the globular shape of the valve body. Modulate the flow of the fluid through the pipeline example. Download ebook stress analysis on gate valve in solidworks stress analysis on gate valve in solidworks gate valve and types of gate valve a detailed explanation learn about gate valves and types of gate valve that used in piping. Types of industrial valves applications, advantages, and. Many types of valves are required in a process plant for flow regulation or onoff purpose. Piston valve, for regulating fluids that carry solids in suspension.
The different types of valves used in the petrochemical industry suit any of the following applications. Valves common types knifegate valves often just called gate valves, these are used as isolation valves. The bonnet, containing the moving parts, is joined to the body, generally with bolts, to permit cleaning and maintenance. 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. Market segment commercial valves industrial valves severe ball valves. Steel wedge gate valves are classified by wedge type. Plug valve, slim valve for onoff control but with some pressure drop. Part material specification 1 body bronze astm b62.
Different types of valves used in piping a complete. Types of manual valves tlv a steam specialist company. Ppt valves gate and globe valves powerpoint presentation. 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 and is called, appropriately, the gate valve. I can use acrobat distiller or the acrobat pdfwriter but i consider your product a lot easier to use and much preferable to adobes a. Different types of valves used in piping a complete guide. These valves contain a gate mechanism that when lifted opens the valve and when lowered closes it. Closure is obtained by driving a taper wedge gate between two similar taper wedge seats. A multitude of valve types and designs safely accommodate a wide variety of industrial applications. The bonnet bolting is manufactured of alloy steel in accordance with the requirements of the applicable specifications such as api 602 and asme b16.
Valve design testing manufacturing international standard download free. Fugitive emissions api 624 and iso 158481 gate valves tested to api 624 at yarmouth research lab, maine, usa body gasket leakage gate valve repair or maintenance problem that may arise. Types of check valves different check valves types of. A control valve that regulates the flow of fluid falls in the regulation category. In this article, i have covered classifications of valves and functions of valves. Bury the gate valve after putting the hand wheel into the state of shut close position. It provides accurate blocking and releasing of process flow. When the gate is in the fully open position it allows free. Types of check valves are swing,tilting, disk, wafer, disk and piston check valves. Gate valve types, construction, applications and advantages. These brands are available in various sizes, end configurations and operating pressures up to 2400 kpa24 barg 350psi. Chapter 5 is a comprehensive guide to selecting the best control valve for an application. There is very little pressure loss through a gate valve.
They are often seen in power plants, water treatments, mining, and offshore applications. If the valve has a rising stem its position can be seen just by looking at the position of the stem. The following types of valves are used in a variety of applications, these descriptions may provide a basic guideline in the. A gate valve consists of a valve body, seat and disc, a spindle, gland, and a wheel for operating the valve. The everbilt lead free gate valves feature a the everbilt lead free gate valves feature a simple design that can quickly and reliably block or permit the flow of fluids, gases, or fumes. Gate valves globe valves check valves ball valves butterfly valves. A manual gate valve is generally sturdy and is often used in critical working conditions. Different types of valves with pdf file engineering discoveries. Gate valves are not suitable for throttling purposes. The valve seat on the other hand is made of two pieces. Mkp gate valves are hydrostatically tested at assembly.
To select the correct valve to fulfill these functions properly, an outline of the different types of valves and their features is given below. A gate valve is generally used to completely shut off fluid flow or, in the fully open position, provide full flow in a pipeline. 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. Gate valves work by inserting a rectangular gate or wedge into the path of a flowing fluid. Class 900 and above gate valves consist of a ring type joint. It is a linear motion valve used to start or stop fluid flow. Solid wedges, flexible wedges, and split wedges are used in valves having inclined seats. A gate valve is a valve that opens by lifting a round or rectangular gate out of the path of the fluid.
For more information, see ieee globalspecs valve applications page. The body is generally connected to the piping by means of flanged, screwed, or welded connections. However, positive identification of a globe valve must be made internally because other valve types may have globular appearing bodies. Download valve catalogue, pdf drawing, ga drawing, cross sectional arrangement design drawing, 3d model drawing, valve strainer filter sight glass flow indicator operation and maintenance manual download from here free. Type of valve employed depends on nature of fluid, flow control required, operating pressure and temperatures as well as surround atmosphere. There are quite a few different types of connections used to install valves and other process components in piping of process systems. Gate valve description gate valves are primarily designed for onoff services when a straightline flow of fluid and minimum restriction is desired. Standard gasket design for bolted bonnet valves is spiral wound type up to class asme 1500. Standard features sizes 112 14 straight through flow with minimal pressure drop unique sliding cylindrical plug design provides larger seating area than conventional gate valves made of durable, corrosion resistant plastic no metal to media contact anywhere in valve.
966 323 931 1615 1657 849 1679 1576 1106 34 243 182 1067 115 1281 852 370 186 511 794 1042 257 951 809 859 1272 970 311 967 851 116 1012 655 1131 741 1447 486 1097 1424