These valves are installed in demanding, high pressuretemperature applications around the world for a variety of services, including main steam, reheat, feedwater, catalytic reforming, as well as other tough applications in power, refining, petrochemical, marine and process industries. Datasheets for industrial valves valves are mechanical devices that control the flow and pressure of liquids, gases, and slurries within a system. V3p velan valvac threepiece full port general purpose ball valve 1. This is only practical in manual valves or electronically controlled motor. Velan abv actuators have their own trademark, moss. Switching to velan power ball valves offered a low torque, easy to operate solution. Bellows seal valves steam traps quality all major certi. Velan holds all major applicable approvals, including. E m i s s i onva cast steel valves w l e on gate, globe, and. Velan power ball valve in high pressure steam service. A considerable leap forward in velan technology was the introduction of forgings for valves larger than 2 50 mm, and up to 24 600 mm, for higher safety applications. Velan forged steel gate, globe and check valves have been proven in critical service applications for over 50 years. However, it is wise to stock packing for each valve. Velan stem seal offers tight seal with little to no maintenance over long periods of time.
Global pressure seal valves market 2020 information. Velan valves are manufactured in 12 specialized plants, including five in canada, two in korea and one each in the u. Velan valves can be equipped with a variety of manual gear, electric. The velan design provides freedom for thermal expansion of the ball without jamming, even at extreme temperatures. Founded in 1950, velan earned a reputation for excellence as a major supplier of forged valves for nuclear power plants and the u.
Search in velan catalogs and technical brochures on directindustry and find the information you need in 1 click. Body made of superior strength forgings and optional cast steel. Valves with cavity relief system are unidirectional. Although rigid metallurgical, radiographic, physical, and visual inspection is the standard procedure for all edward products, it is inevitable that. Stem the stems of jc gate valves are forged from one piece and acme threaded, then mechanized and finally provided with a smooth finishing in order to minimize friction. Pressure seal construction is adopted for valves for high pressure service, typically in excess of above 170 bar. All velan catalogs and technical brochures catalogs directindustry. Over 150 cnc machines are in operation in velans north american plants. Velan is a world leader in the design and production of a wide range of cast and forged steel gate, globe, check, ball, tripleoffset butterfly, knife gate, highly engineered severe service valves, and steam traps offering superior performance across all major industrial applications. Velans power ball valve is a highly advanced, patented, forged, onepiece metalseated valve. As the system pressure increases, the force on the pressure seal. Unique parallel slide forged cage unit design comprises all operating parts of the slide discs. Velans power ball valve joins a long list of proven products for power, including our forged bolted bonnet and pressure seal valves, bonnetless ypattern globe valves, cast steel valves, small forged valves, large metalseated ball valves, and bimetallic steam traps. Only velan offers the advantages of onepiece forged valves.
Gate valve dimensions size asme class 150 asme class 300 asme class 600 asme class 900 asme class 1500 nps dn. Production testing equipment is designed to safely and efficiently test highpressure valves in strict accordance. Velan concaveconvex flexible intension seats with induced sealing memory u. Velans comprehensive quality program is fully compliant with the most stringent industry standards and has been surveyed and audited by leading organizations, regulatory bodies, utilities, and architectengineers from around the world. Superior performance based on 45 years of experience velan bellows seal valves 2500 class hpht bonnetless globe valves in power stations see page 12. The velan design provides freedom for thermal expansion of the ball without jamming, even at. Velan pressure seals with p in part number are forged body, k in the part number is cast body. Velan qualification testing program with lectricit. Asme section 8 mid flanges and bolting eliminates weak center section. They are also known as regulators and are used in a wide variety of applications. Liveloaded thrust washer prevents galling and provides secondary stem seal. E m i s s i onva cast steel valves w l e on gate, globe. 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.
Special power tools are available for cutting seal weld. At 700 valve supply, we maintain an extensive inventory of globe, gate, and check valves to serve the oil and gas energy sector. Positive closing the bimetallic element is a function of the saturated steam curve and its sensitivity to the temperature change assures an immediate reaction to both steam and condensate for the entire pressure range. Manufacturing north america manufacturing europe velan. Back pressure in the discharge pipe, a sudden drop or rapid fluctuation in steam pressure, or discharging to. Electrodes produced in these furnaces are remelted in vacuum with electrodes pressed directly from chemical powders. The velan stem seal evolved from these test findings. Velan reserves the right to change this information without notice. Velan pressure seal parallel slide gate valves are ideal for clean service and steam. A complete range of gate, globe, and check valves for all of your high pressure and high temperature applications, proven over years of service in conventional thermal and nuclear power plants as well as other hp steam services around the world. A slight interference angle produces a line contact and high sealing pressure. It uses the valve system pressure to provide sufficient forces against the valve bodys internal diameter id and the bonnet surfaces. Global pressure seal valves market 2020 with potential. Pressure seal and bolted bonnet valves velan pdf catalogs.
The main design features of xanik pressure seal valves are. Products pressure seal forged and cast steel valves. Resilientseated ball valves featuring memoryseal seating technology, low emissions packing chambers, and other valueadded technical features for superior performance. Velan abv manufactures actuators as part of our valve control system packages, which are specifically designed to operate quarterturn valves i.
Velan forged valves offer greater strength and increased toughness for maximum reliability and safety. The velan singleseat ball valve has a flat spring set acting through a hardfaced bearing against the bottom ball shaft which provides sufficient initial ballseat load for valve tightness, even at low. Before removing a valve from a line, line pressure must be relieved with no exception. The unique feature about the pressure seal bonnet is that the bodybonnet joints seals improves as the internal pressure in the valve increases, compared to other constructions where the increase in internal pressure tends to create leaks in the bodybonnet joint. Consult velans entire knife gate valves catalogue on directindustry. Testing a 24 pressure seal valve please note this is a condensed catalog.
Oct 12, 2017 setting the standard for high quality valves in power generation. Under internal pressure, the bonnet is forced against the pressure seal gasket, wedging it against the body neck wall. Today velans comprehensive range of api 602 gate, globe, check, angle, and bellows seal valves remain the leading choice for high performance in virtually any industrial application. Velan products pressure seal forged and cast steel. Fully enclosed spiral wound graphite filled stainless body gasket. All welding techniques employed at velan are in accordance with qualified welding procedures for smaw, gtaw, gmaw, ptaw, and saw processes. The performance of velans forged pressure seal and bolted bonnet gate, globe and check valves is legendary. A type of connection a special c combination r flanged, ring joint w socket weld b butt weld f flanged, b16. Velan cast steel api 600 gate valves ks distribution. Also preferred in high pressure, high temperature hydrocarbon or petrochemical processing services.
Our products are available in a variety of standard and unique materials such as duplex, super duplex, inconel, titanium, and monel. If you are using internet explorer 6, you may have to right click and select save as. Velan abvs moss actuators have a scotch yoke modulartype. Cast steel valves gate, globe, and check zenith supply company. At time of printing velan is performing tests on a graphite gasket recommended by a major oil company. It is designed to help you obtain the most satisfactory service from these valves.
If the tests are satisfactory then velan may standardize on the new graphite gasket reinforced with stainless steel. Velan design and built top quality products in high pressure with an emphasis on weight and space savings, low emissions, safety, ontime delivery, easy in installation, low maintenance and long and reliable service life. Pressure seal valves used in oil and gas applications. On sealwelded valves, removal and replacement of weld is necessary. Velan flexible wedge offers superior tightness of seats and freedom from sticking. Forecast till 2028, also offering latest industry research value according. The greater the valve pressure the tighter the metaltametal seal. When the system pressure is turned on, the seal becomes a permanent part of the valve until it requires. The pressure seal gasket is placed just below the keeper ring. Patent 3,384,341 the intension seats, when flattened during the ball valve assembly strech somewhat like an elastic band, ensuring reliable seat tightness even at low pressure. You need 19 types of hermetically sealed stainless steel inverted bucket steam traps to cover the range of this 1 velan steam trap for 0250 psi 017 bar and 2000 lbhr 907 kghr capacity type size in mm a face to face b center to bottom c center to top weight ib kg. Consult velans entire pressure seal and bolted bonnet valves catalogue on directindustry.
Bellows seal gate and globe valves pdf nuclear parts center. With enough force, the metal will move into its correct position and force the toe between the body id and the bonnet surface. Advanced pressure seal design standard design new liveloaded design liveloading maintains bonnet seal regardless of pressure temperature fluctuations a a bonnet seal decreases with bonnet seal loss of pressure increases with pressure a a b c system pressure b d d c c sealing forces due to pressure. Seal offers the advantage of flexible graphite 014ph. Velan valves ltd leicester, england installation, servicing and maintenance instructions contents page 5 5 5 6 6 7 7 3.