Reliable, tight shutoff and lowpressure drop operation characterize the flowserve range of gate valves. Splitwedge or flexiblewedge type gate valves are expected to perform better than solidwedge gate valves when thermal binding is a concern. Wedge gate valves are commonly supplied with solid wedge up to 2 size and with flexible wedge for larger sizes. Flowspec is one special manufacturers in producing ball valve, gate valve, globe valve, check valve, pressure reducing valve, fire valve and fire valves for over 30 years. You can also choose from manual flexible wedge gate valve there are 240 suppliers who sells flexible wedge gate valve on, mainly located in asia. Gate valves fittings,parallel gate valve,wedgeshaped gate. Find here online price details of companies selling wedge gate valves. Aug 19, 1997 the flexible wedge gate valve shown in fig.
Among the objectives of this research program is a task to determine what. China flexible wedge api 6d rising stem flanged gate valve, find details about china flexible wedge gate valve, ansi standard gate valve from flexible wedge api 6d rising stem flanged gate valve shanghai yichen valve co. The professionals working with us manufacture these valves using high quality steel following industry set guidelines. If the fluid pressure is high, frequent valve operation may lead to excessive wear of the. With the addition of a groove or slot around its periphery, the flexible wedge gate valve can adapt to temperature changes and adverse piping stresses without binding. Jwedge integral guide rib faces assure selfcentering of wedge. The wedge is made in one solid piece being the downstream side the one which seals the valve when upstream pressure push the wedge againts te downstream seat. Equation 1 affect the stem forces during valve operation. Cast steel gate valves,flanged gate valves,flange gate valves,conduit gate valves, wedge gate valve, flexible wedge gate valve,solid wedge gate valve,renewable seat,steel gate valves,stainless steel gate valve, gate valves, gate valve manufacturers, gate valve supplier.
The api 600 gate valve supplied by metals valve is a typical wedge gate valve which uses two inclined seats and a slightly mismatched inclined gate that allows for tight shutoff, even against higher pressures. Velan pressure seal flexible wedge gate valves are ideal for high pressure steam main steam isolation, liquid feedwater isolation, catalytic reformers, hydrocrackers and other tough services. A large bore gate valve with body guided, split wedges, offering superior leak tightness and performance. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate. Solid wedge is the most commonly used disk by its simplicity and strength.
The flexible wedge shifts along the body of the valve during opening and closing, being held in position by a guide slot that minimizes the friction between body seat and wedge. Flexible wedge gate valves the velan flexible wedge, with round geometry and stem low in the cavity, was pioneered by velan in 1960. There will be one gate or wedge in gate valve and it will control the fluid flow. Flexible wedge all jc gate valves 3 and above valves feature a flexible wedge unless otherwise specified by the customer. Gate valves are available with different disks or wedges. Parallel slide gate valves inclined globe valve design. Solid wedges, flexible wedges, and split wedges are used in valves having inclined seats. As the name says the gate valve, a flat circular or rectangular plate acts as a gate in a pipeline. Gate valves also known as knife valves or slide valves are linear motion valves in which a flat closure. I disagree with both definitions for the flexible wedge. Wedge gate valves differ from parallel gate valves in that the closure member is wedge shaped instead of parallel, as shown in figure 334 through figure 345. Cast steel gate valves,wedge gate valve,flexible wedge gate. Gate valve flexible wedge gate valve products winning. You can see valves from household to some big industries.
Gate valves selection guide engineering360 globalspec. Wedge gate valves refer to conventional gate valves that have design features such as. Gate valve types, construction, applications and advantages. Cast steel wedged gate valve for oil and gas industry disks of a gate valve. The purpose of the wedge shape is to introduce a high supplementary seating load that enables metalseated wedge gate valves to seal not. Asme gate valve class 300 with flexible wedge werkstoffematerials.
Parallel disks are used in valves having parallel seats. A shallow, narrow cut gives little flexibility but retains strength. May 15, 2017 gate valve is basically used in fluid pipelines for controlling the flow of fluid. Gate valve is basically used in fluid pipelines for controlling the flow of fluid. Flexible wedge is a onepiece disc with a cut around the perimeter to improve the ability to correct mistakes or changes in the angle between the seats. Introduction gate valves play an important role in todays generation. What is gate valves types, application a gate valve, also known as a sluice valve, is a valve which opens by lifting a round or rectangular gatewedge out of the path of the fluid. Get info of suppliers, manufacturers, exporters, traders of wedge gate valves for buying in india. A correct profile of the disk half in the figure 6 flexible wedge gate valve flexible wedge design can give uniform deflection properties at the disk edge, so that the wedging force applied in seating will force the disk seating surface uniformly and tightly against the seat. When the valve actuates down the gate slice the fluid to total shut off. Bolted bonnet,threaded or welded seat ring, renewable seat ring. Flexible wedge gate valves flex wedge flowserve skip to main content. International journal of innovations in engineering and technology ijiet.
Because of the straight bore all impurities can pass through the valve without doing any harm. Flexible twindisc sealing, and minimum optroleum refineries, power power plants,and industrial service. Wedge gate valve bolted bonnet type rays flow control. Shape of gate or wedge of gate valve will be a type of flat circular plate or rect. Owing to our experienced team of professionals, we are able to manufacture, supply, trade and export qualitative wedge gate valves. Isolation valve double disc wedgewithinwedge engineering great solutions. The gate valve is a linear actuating valve used as flow isolater in a fluid pipeline. The flex wedge valve has a single piece, optimized gate design to provide minimized seat leakage.
Combined with the full bore it will prevent pressure loss caused by turbulence. Ranging of the gate valves is usually made by the type of wedge used. This design is little easier to manufacture and is the most common type seen on. 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. Flexible wedge, split wedge, slab gate and doubledisk configurations cover a range of requirements to meet any user need, from general service to severe conditions with gross thermal transients or dualphase fluids. The function of valves is to control the flow, pressure, velocity and direction of liquids. Flexible twindisc sealing, and minimum optroleum refineries, power. Classification of gate valves is usually made by the type disk used. Gate valve dn900 x 150 is designed and then analyzed using simulation software for agreeable results. Gate valve ball valve supplier,ball valve manufacturers. A wide variety of flexible wedge gate valve options are available to you, such as low pressure, high pressure. Manufacturing north america manufacturing europe head office montreal, canada velan inc.
Asme gate valve class 300 with flexible wedge 1 kitz fig. Classification of gate valves gate valve disk, stem. Pressure seal flexible wedge gate valves datasheet velan. The program should include at least factory testing of each valve for body and seat leakage. In a gate valve a flexible wedge has a cut around its perimeter. Wedge gate valve china valve manufacturer metals valve. Compliant with asme section iii and rccm design codes, this valve is the industry standard for fastacting, reliable isolation of main steam or main feedwater lines. Anchordarling gate valves are designed to provide isolation of a piping system or a component when closed. Cast steel gate valves,wedge gate valve,flexible wedge. Gate metal seated gate valve series 2 valve jfs feature solid wedge gate valves are the perfect solution as a closing device in pipeline systems. J wedge integral guide rib faces assure selfcentering of wedge.
Flexible wedge design the wedge has a machined groove in its central part providing flexibility at the disc. Gate valves may have either a solid or flexible wedge disk. Plant personnel are kept safe through the application of fastacting. Parallel slide gate valves inclined globe valve design available but not shown. A correct profile of the disk half in the flexible wedge design can give uniform deflection properties at the disk edge, so that the wedging force applied in seating will force the disk seating surface uniformly and tightly against the seat. Mcq, power plant, guest articles, online test, software, how it works, process fundamentals. Flexible wedge gate valve archives instrumentation tools. Jan 15, 2002 the flexible wedge gate valve shown in fig. China flexible wedge api 6d rising stem flanged gate valve. Flexible wedge gate valves are commonly used in steam systems. Program, aimed at improving production processes and was awarded.
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. Edward flexible split wedge gate valves valve sales and. The latter design consists of two independent and flexible wedge halves, that allow a relative movement to accommodate changes in the body seat angles. The flexible wedge gate valve illustrated in below figure is a onepiece disk with a cut around the. The function is to allow the seating surfaces of the disc to flex a bit so they can conform to the seats and shut off tightly, while allowing for a bit of deflection from piping loads, thermal distortion, machining tolerance. Velan flexible wedge offers superior tightness of seats and freedom from sticking. In this paper, gate valve dn900 x 150 is designed and then analyzed using simulation software for agreeable results. Pressure seal flexible wedge gate valves datasheet. The disc can moved up fully into the upper portion of the body and results no hindrance to. High pressure gate valve assembly animation duration. Flexible wedge gate valve the flexible wedge gate valve illustrated in below figure is a onepiece disk with a cut around the perimeter to improve the ability to match error or change in the angle between the seats. When full port gate valve is required or double block and bleed valve is mandatory this design must be used.
94 1205 1440 1218 174 1340 405 1238 237 945 15 1066 796 268 679 1091 1542 1246 1000 1565 892 1268 1250 309 386 788 256 1355 1237 909 714