ChinaGateValveSuppliers Private individual

ChinaGateValveSuppliers Carbon steel gate valve suitable for industrial, process, offshore and petrochemical use. Manually operated, supplied with a handwheel (gearbox). carbon steel bolted bonnet gate valve is suited for process, off shore and petro-chemical industry use. They are robustly constructed having a flexible wedge which gives a positive shut off even when the pipework in which the valve is fitted, is stressed. These valves are usually flanged to ANSI B16.5 standards but can also be supplied to BS4504 & BS10 standards Features, Benefits & Approvals 鈼?Outside screw & yoke 鈥?Rising stem with flexible wedge 鈼?Handwheel operated as standard 鈼?Gearbox & actuator options available - Carbon Steel Gate Valve Trim 8 ANSI Class 150 / 300 /600 RF - Also known as Cast Steel, WCB, CS Gate Valve. - Standard Graphite Packing. - Other gasket material can be made available. - Design and Manufacture according to API 600 or API 602. - Face-to-Face dimensions according to ASME B16.10 - 2009. - End Flange Dimension according to ASME B16.5 - 2009. - Inspection and Test according to API 598 - 2009. Technical Data Design StandardAPI600, API6D, DIN3352, EN10434 Body MaterialWCB, LCB, LCC, WC6, WC9 NACE MR-01-75/NACE MR-01-03 Special Requirements Pressures rangeANSI 150 ~ANSI 2500 ,PN10~PN420 Size rangeDN50(2") ~DN1200 (48") Face to FaceANSI1B 16.10 ,EN 558,DIN3202 Flanged RF, FF, RTJ EndsASME B16.5 鈮?DN600 (24") ASME B16.47 A 鈮?DN650 (26") BS 4504,DIN 2543-2545,EN1092 Butt-Weld BW EndsASME B16.25 ,DIN 3239,BS 2080, EN 12627 Temperature range-29掳~ 425掳C Design Feature ConstructionPressure seal锛孊olted Bonnet, Welded bonnet Wedge Typeflexible wedge, solid wedge, double wedge etc Stem DesignRising stem,Non-rising stem Seat SealingIntegral body seat ,seat welded and overlaid Valve OperationBevel gear, handwheel, bare shaft By passes,locking devices,extended stem,etc Fire Safe DesignAPI 607,BS 6755 Inspection and Test Visual InspectionMSS SP-55 Material InspectionPMI Test----Chemical Analysis HB Test---Hardness Test UT---Ultrasonic Test RT---RadiographicTest MT---Magnetic Test NDT Test Non-destructive Dimention inspcetionAccording to drawings Valve Inspection and TestAPI 598,DIN 3230,EN 12266,BS 5146 Summary of gate valve A gate valve is designed for a fully open and or a fully closed service. They act as an isolating valve since its only function is either to stop or to let the flow go through. It allows minimal dirt from entering the pipe. Gate valves have 2 main parts which are parallel and wedge-shaped. For the parallel shape, it鈥檚 a flat gate valve with 2 parallel seats that has a sharp edge at the bottom. The wedge shape valve has 2 inclined seats but the gate tends to mismatched. There are 3 types of gate valves: the solid taper wedge, the flexible wedge, and the split wedge or parallel disk valve. A solid tape wedge is the most common. Due to its simplicity and strength, it can be installed in any position. It's good for all types of fluid, but this type of design does have some leakage. A flexible wedge is a one piece solid disk with a cut around the perimeter, which is good for thermal binding. It has better seat alignment which helps prevent leaks and are mostly used in steam systems. A split wedge has 2 discs and holds together with a special mechanism which allows a disc that's out of alignment to adjust back into place while the other disc holds up everything. The parallel disk have 2 discs that are spring loaded.They are mostly used in non-condensing gasses and liquids at normal and high temperatures without the valve being affected. How to Use a Gate Valve Gate valve operation is simple, only requiring the user to turn the handwheel in the correct direction to open or close the valve as necessary. Closing or opening a gate valve involves rotating the wheel through 360 degrees in the required direction - this, in turn, rotates the threaded valve stem, and thus raises or lowers the attached gate disk. How to Tell If a Gate Valve is Open or Closed Unlike with certain other flow valve types, it is not always easy to tell whether a gate valve is open or not. Ball valves and butterfly valves, for example, will usually be closed when the handle is perpendicular to the pipeline or flow direction. Since gate valve wheels sit above or to the side of the pipe and rotate through 360 degrees to open and close, you cannot always tell which position they are in at a glance. In most cases, turning a gate valve anticlockwise will open it, while turning it clockwise will close it. These directions will normally be marked on the handwheel or elsewhere on the outer body of the valve. Unless you know for a fact that a gate valve is jammed or bound, you should always stop turning them when you start to feel significant resistance. Continuing to turn a gate valve against resistance can damage it, or the plumbing or ducting it is installed on. It may therefore be necessary to try turning a gate valve in either direction to ascertain which position it is currently in. What are Gate Valves Used for? Most types of gate valve can be thought of simply as a sluice valve or control valve for water supply. Gate valves are used for starting or stopping the flow of liquid (or steam/gas) through a section of pipeline, allowing that section to be completely shut off and isolated when necessary. They are among the most common sorts of valves and taps you will find in most pipeline applications, and are used in a wide range of industrial settings. These might typically include: 鈼?Oil and gas extraction 鈼?Processing plants and water treatment facilities 鈼?Various types of factories and production environments 鈼?Medical and laboratory uses 鈼?Food production and catering 鈼?Auto