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. Some designs of gate valves are susceptible to thermal or pressure binding, depending upon the application. Options for manual overrides, atex, gas approval, media separation and more. May, 2017 gate valve is basically used in fluid pipelines for controlling the flow of fluid. They can be used to limit the amount of media going. If hydraulic pressure is bled off, the power spring and well pressure combine to.
Centertoend or endtoend dimensions for welding end valves same as centertocontact face. Move a flexible material into the flow passage for example, diaphragm and pinch valves. Angle pattern globe valve have ends that are at angle of 90 degree and fluid flow through this 90 degree turn. Valves common types check non return valves check valves or non return valves are designed to ensure one way flow only. You may see an occasional knife gate used, or if you work with crude oils, you may see a slab gate. The seat rings are steel and makeup part of the valve trim. 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. This article explains the construction, working and usage of gate valves and the usage of these types of valves in ships and marine vessels. Gate valves and knife valves are linear motion valves in which a flat closure element slides into the media stream to shut off flow. Good shutoff features gate valves are bidirectional and therefore they can be used in two directions pressure loss through the valve is minimal the major drawbacks to the use of a. The gate in a gate valve can come with several variations. In a conventional valve, packing consolidation takes place and the packing. Valves and types deataildescription linkedin slideshare.
Gate valve thermoplastic valves, actuators, plastic piping. To select the correct valve to fulfill these functions properly, an outline of the different types of valves and. All gate valves shall be constructed of high impact pvc and have no metal to media contact. British standard bs, oval, round and flat body gate valves with metal sealing and elliptical gate valve with resilient sealing. Abstract the suction and discharge valves are key parts of every reciprocating compressor. Just like the ball valve, the gate valve is an allornothing valve, designed to either allow full flow or shut it off completely. Usually used in water pipework systems and installed immediately after the pump. Gates gate valves are devices typically used in the wider sections of pipes to control the flow of heavy and solid liquids. To select the correct valve to fulfill these functions properly, an outline of the different types of valves and their features is given below. 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. High quality packing for reliable tightness and low emission performance.
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. Figure 196 illustrates two types of subsea gate valves. Angle pattern globe valve are useful in applications with pulsating flow. Tee pattern globe valve is mostly used in throttling application. Valves, in a myriad of designs and sizes, are an integral part of piped systems that convey gases and liquids. In such a design, a wedge slides cross a general passageway in order to control fluid flow like a sliding gate hence, the name. Ideal for quick shutoff, since a 90 turn completely shutsoff, compared to multiple 360 turns for other manual valves. A gate valve is designed to turn the flow of liquid through pipes on and off. Through conduit double expanding gate valve rays flow. Nov 04, 20 in our discussion of the world of maritime supplies, a detailed listing of valves is a necessary procedure. The model fc gate valve is a field proven valve which provides reliability and interchangeability. Gate valves are not suited for regulating flow as the gate arrangement allows the valve to. The bonnet bolting is manufactured of alloy steel in accordance with the requirements of the applicable specifications such as api 602 and asme b16. Gate valves are somewhat unusual in residential plumbing and are more common in industrial applications.
Shape of gate or wedge of gate valve will be a type of flat circular plate or rect. No special tools are needed to change gate and seat assembly. The valve manufacturers are constantly working to improve lifetime and performance of valves. They serve to control and regulate the flow of these substances in a safe, secure and prescribed manner. Valve types and configurations gate valves kitz corporation.
The ratio fl of the valve flow coefficient cv based on the pressure drop at the vena contracta, to the usual valve flow coefficient cv which is based on the overall pressure drop across the valve in nonvaporizing liquid service. Depending on the valve service it can be supplied flatface gasket with graphite or ptfe. The disk of a gate valve is completely removed when the valve is fully open. Valves are quite diverse and may be classified into a number types. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. White, mcgrawhill, 1999 butterfly valve used mainly for onoff lots of torque needed for high flow rates from chemical process control, by j. The fc valve has bidirectional sealing and a nonrising stem making it ideally suited for drilling manifolds, xmas trees, and severe service. Commission europeenne, dg comp merger registry, 1049. 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 check valve is the disc type horizontal or vertical. In service, these valves generally are either fully open or fully closed.
The gate acts like a shutter that separates the inside of a house from the outside or a door that separates two rooms. Gate valve types, construction, applications and advantages. When selecting a gate valve, the material used to construct the valve is a critical decision to prevent premature valve failure or system delays. The gate faces can be parallel but are most commonly wedgeshaped in order to be able to apply pressure on the sealing surface. Types of gate valve and parts a complete guide for engineer. Valve types and features the three basic functions of valves are. Features and description of edward equiwedge gate valves. Through conduit double expanding gate valve industrial valves. Also, like the ball valve, a gate valve is a large metal valve. Gate valves are used when a straightline flow of fluid and minimum restriction is desired. Additionally, the laboratory was equipped with a 100channel strain gage data acquisition.
Valve stem leakage is usually controlled by properly compressing the packing around the valve stem. Types of manual valves tlv a steam specialist company. Ball valves are quarter turn valves, commonly used for bidirectional isolation applications. A gate valve is the most common type of valve that used in any process plant.
One of the most significant characteristics of this type of valves is its. Ball valve, for onoff control without pressure drop. Onoff valves are used to either allow the media to flow through or to stop the media. Common types of rising stem valves are globe valves, gate valves, pinch valves diaphragm valves are a type of pinch valve, and needle valves. Please see the table below which gives an overview of gate valve types and their suggested applications. Gate valves come in a few different varieties that include rising stems or nonrising stems, and they can also come.
Gate valves are primarily designed to start or stop flow, and when a straightline flow of fluid and minimum flow restriction are needed. Api 6a slab gate valves are normally preferred with insidescrew. Their coefficient of flow is lower than wye pattern globe valves. Due to their material and construction, ball valves are not appropriate for use in applications that require partial opening of the valve. Gate valves are isolation valves with generally two seats and a gate moving up and down by use of a stem operated either by wheel, gear or actuator. Gate valves up to and including nominal size 1 14, 300 classes may be lifted or carried by the hand wheel without damage to the valve. There are several types of valves that are in common use, including but not limited to the gate, ball and butterfly valves. The principle is simply a knife or gate which is dropped in front of the flow. There will be one gate or wedge in gate valve and it will control the fluid flow. Control valves operated through pneumatic actuators can be either i air to open. Also known as a sluice valve, it controls flow by moving a round or rectangular wedge in and out of the liquid path. They are designed for tight sealing and ease of operation. Gate valves for cameron style fc gate valve drilling. Miv offers gate valves with metal and resilient sealing and versions with spindle.
Gate valves work by inserting a rectangular gate or wedge into the path of a flowing fluid. Gate valves are used in many industrial applications including the oil and gas industry, pharmaceuticals, manufacturing, automotive, and marine. Bfe reserves the right to change designs, dimensions or specifications w. Valve failure is the single most reason for a scheduled or unscheduled shut down. The gate shall be a tapered cylindrical plug design pvc shall conform to astm d1784 cell classification 12454a, and pp to astm d4101 cell classification sample specification pp0210b67272. As the gate can be opened to the full bore it provides very less frictional loss. Different types of control valves instrumentation tools. Semidirect acting solenoid valves combine the properties of direct and indirect valves. Replace cameron fc gate valves for a fraction of the price without sacrificing quality, reliability or durability.
Shashi menon, in transmission pipeline calculations and simulations manual, 2015. Each type of valve has been designed to meet specific needs. Some valves are capable of throttling flow, other valve types can only. Gate valves are so named because the part that either stops or allows flow of fluid through the valve. A gate valve can be used for a wide range of liquids and provides a tight seal when closed. Gate valves require very little space along the pipe axis and hardly restrict the flow of fluid when the gate is fully opened. Valve types and configurations ball valves kitz corporation. Valves can be categorized into the following types, based on their operating mechanism. Good shutoff features gate valves are bidirectional and therefore they can be used in two directions pressure loss through the valve is minimal the major drawbacks to the use of a gate valve are. 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. 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. It is a linear motion valve used to start or stop fluid flow. Gate valves are used in a wide variety of applications and may come into contact with an assortment of media. Gate valve thermoplastic valves, actuators, plastic.
Double block and bleed capability and high robustness are standard feature of this seat design. Affordable and search from millions of royalty free images, photos and vectors. Mar 16, 2011 gate valves globe valves plug valves diaphragm valves ball valves butterfly valves needle valves check valves pressure relief valves control valves s slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Gate valves also known as knife valves or slide valves are linear motion valves in which a flat closure element slides into the flow stream to provide shutoff. Class 300 and 600 valves consist of a circular spiral wound gasket. Valves common types knifegate valves often just called gate valves, these are used as isolation valves. The valves have performed well with no maintenance issues. An introduction to gate valve, selection, types, and. Portable document format pdf is an open standard for document exchange. They are designed specifically to control the opening and closing of liquid flow. Gate valves, also known as sluice valves are one of the most widely used valves in both domestic and industrial applications. Water valves can range from main water valve found near the water meter where water first enters your home to small individual fixture shutoff valves located just before the small supply tubes delivers water to faucets, toilets, or other appliances. In systems experiencing hightemperature fluctuations, wedge gate valves may have excessive leakage past the seats due to changes in the angular relationship between the wedge and the valve seats caused by piping loads on the valve.
Compare ball, gate and butterfly valves lockout tagout. Rotate a disc or ellipse about a shaft extending across the diameter of an orifice for example, a butterfly or ball valve. Gate valves are used in applications where a full unrestricted flow of the fluid is desired. 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 distinct feature of a gate valve is that the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straightline flow of fluid and minimum restriction is desired. 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. Types of valves a gate valve b globe valve c angle valve d swingcheck valve e disktype gate valve from fluid mechanics, by f. A closer look at 10 different types of valves world wide. Many different types of manual valves are used in industrial applications worldwide. A gate valve opens by lifting a gate out of the path of the fluid. In systems experiencing hightemperature fluctuations, wedgegate valves may have excessive leakage past the seats due to changes in the angular relationship between the wedge and the valve seats caused by piping loads on the valve.
Ball valves are suitable for use with fullon, fulloff flow control in general service. A triple offset valve for instance which is a type of control or isolation valve can be replaced by a ball valve or gate valve to perform the same function. Through innovative organic development and strategic acquisition, we have built a broad portfolio of asme and api valves that services the demands of global. In order to select the proper valve material there are several important criteria to be. Knifegate valves come in all sizes and can have manual hand wheels or pneumatic actuators to raise and. Gate valve is basically used in fluid pipelines for controlling the flow of fluid. It is also helpful in controlling the flow of pressure through the pipes and valves. Some of these valves are quite large, while others are quite small. It is generally used on a valve that is not used frequently.
Globe valve tee pattern angle globe wye globe valve. Gate valves are not suitable for throttling purposes. Gate valves looks similar to a globe valves from the outside due to the fact that they often are producers from the same body and it could be a challenge to. Class 900 and above gate valves consist of a ring type joint. The file format created by adobe systems in 1993 is used for representing twodimensional documents in a manner independent of the application software, hardware, and operating system. Gate valves are not intended to use for throttling flow, so dont leave them halfopen. Class 150 gate valves consist of a square joint in 2 and an oval one for all other sizes. 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.