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A gate valve is a gate plate of an opening and closing part. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact of the valve seat and the gate plate. Usually, the sealing surface will be welded with metal materials to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. The gate has a rigid gate and an elastic gate. According to the different gate plates, the gate valve is divided into a rigid gate valve and an elastic gate valve. Area of application Marine industry, Water supply & drainage, fire fighting, shipbuilding, water treatment, power stations, energy, food, chemical, and other systems Data sheet of gate valve: TYPE: Wafer, double flange SIZE & CONNECTIONS: Resilient seated: DN50 to D600 Metal seated: DN50 to DN1200 MEDIUM: Waste water, Water, Seawater, Air, Inert Gas, Oil. MATERIALS: Cast Iron / Ductile Iron/ Carbon Steel / Stainless Steel / Alu Bronze PRESSURE RATING: PN10, PN16, PN25 TEMPERATURE: -30°C to 200°C SEAT/LINING: Replaceable Liner / Bonded Liner NBR/EPDM/VITON; SS/BRONZE CERTIFICATES & APPROVALS: DNV-GL, Lloyds, DNV, ABS, BV Type Approval 3.1 & 3.2 Cert (on request) Standards Design and Manufacture Conform to AWWA, BS5163, DIN-F4,F5 Dimensions Conform to EN1092-2,ANSI B16.5 Face to Face dimensions Conform to EN558-1, API 594, DIN3202 Testing Conform to EN12266-1, API598 Material of gate valve Parts PART NAME Material BODY Cast Iron; Ductile Iron; Stainless Steel; Carbon steel DISC / FLAP Stainless Steel; Carbon steel; Bronze SHAFT / STEM Brass, Stainless Steel Monel; Stainless Steel Inconel SEAT / LINING NBR/EPDM/VITON SS/BRONZE BOLTS Carbon steel NUTS Stainless steel GASKET/PACKING Graphite NAME PLATE Aluminum WASHER Steel HANDWHEEL Cast Iron BUSHING/RING Cast Brass Actuation Worm-gear/hand-wheel Electric-actuator Pneumatic-actuator Hydraulic-actuator Gate valve features Advantages: Low flow resistance. Less effort when opening and closing. Large height and long opening and closing time. Water hammer phenomenon is not easy to produce. The reason is the long shutdown time. The medium can flow in any direction on both sides, easy to install. The structure length is small. The shape is simple, the structure length is short, the manufacturing process is good, and the application range is wide. The structure is compact, the valve has good rigidity, the channel is smooth, the flow resistance is small, the sealing surface is made of stainless steel and hard alloy, and the service life is long. The use of PTFE packing is reliable and easy to operate. Disadvantages The overall dimensions and opening height are large. The space required for installation is large. During the opening and closing process, there is relative friction between the sealing surfaces, which can easily cause scratches. Gate valves generally have two sealing surfaces, adding some difficulties to processing, grinding and maintenance. Related types of valves: We can also produce check valve, globe valve, knife gate valve and ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D, More video of gate valve, please see: https://www.youtube.com/watch?v=AI-LT1dy2sU