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Flanged Gate Valves

Flanged gate valves are essential components in various industrial and municipal applications, renowned for their reliability and efficiency in controlling the flow of fluids. These valves feature a robust design, incorporating flanges that allow for easy installation and maintenance within piping systems. The flanged connection provides a secure seal, reducing the risk of leaks and ensuring the integrity of the system.

 

One of the primary advantages of flanged gate valves is their ability to provide a straight-line flow path, which minimizes pressure drops and turbulence. This characteristic makes them ideal for applications where maintaining consistent flow and pressure is critical, such as in water supply, oil and gas distribution, and chemical processing.

 

Flanged gate valves are typically operated using a handwheel or actuator, allowing for precise control over the opening and closing of the valve. When fully opened, the gate retracts completely into the valve body, providing unobstructed flow, while closing the valve involves lowering the gate back into position to block the flow. This design not only enhances operational efficiency but also helps in isolating sections of a pipeline for maintenance or repair.

 

These valves are available in various materials, including cast iron, stainless steel, and ductile iron, making them suitable for a wide range of media, including water, steam, oil, and corrosive fluids. Additionally, flanged gate valves are designed to withstand high pressures and temperatures, ensuring durability and longevity even in demanding environments.

 

Different Types of Flanged Gate Valves

Flanged Gate Valves Technical Specifications

Nominal diameter Unit Main connection dimension
Inch DN L D D1 D2 b z-∅d W
2" 50 mm 178 152 120.5 92 19.1 4 - 19 200
2-1/2" 65 mm 190 178 139.5 105 18 4 - 19 200
3" 80 mm 203 190 152.5 127 23.9 4 - 19 250
4" 100 mm 229 229 190.5 157 23.9 8 - 19 250
5" 125 mm 254 254 216 186 23.9 8 - 22 250
6" 150 mm 267 279 241.5 216 25.4 8 - 22 300
8" 200 mm 292 343 298.5 270 28.5 8 - 22 350
10" 250 mm 330 406 362 324 30.2 12 - 25.4 400
12" 300 mm 356 483 432 381 31.8 12 - 25.4 450
14" 250 mm 381 533 476.5 413 35 12 - 29 500
16" 400 mm 406 597 539.5 470 36.6 16 - 29 600
18" 450 mm 432 635 578 533 39.7 16 - 32 600
20" 500 mm 457 698 635 584 42.9 20 - 32 680
24" 600 mm 508 813 749.5 692 47.7 20 - 35 760

 

Flanged Gate Valves Dimensions and Info(e.g.)

Class Nominal diameter Unit Main connection dimension
150Lb (2.0Mpa) Inch DN L D D1 D2 b z-∅d W
2" 50 mm 178 152 120.5 92 19.1 4 - 19 200
2-1/2" 65 mm 190 178 139.5 105 18 4 - 19 200
3" 80 mm 203 190 152.5 127 23.9 4 - 19 250
4" 100 mm 229 229 190.5 157 23.9 8 - 19 250
5" 125 mm 254 254 216 186 23.9 8 - 22 250
6" 150 mm 267 279 241.5 216 25.4 8 - 22 300
8" 200 mm 292 343 298.5 270 28.5 8 - 22 350
10" 250 mm 330 406 362 324 30.2 12 - 25.4 400
12" 300 mm 356 483 432 381 31.8 12 - 25.4 450
14" 250 mm 381 533 476.5 413 35 12 - 29 500
16" 400 mm 406 597 539.5 470 36.6 16 - 29 600
18" 450 mm 432 635 578 533 39.7 16 - 32 600
20" 500 mm 457 698 635 584 42.9 20 - 32 680
24" 600 mm 508 813 749.5 692 47.7 20 - 35 760

 

Advantages of Flanged Gate Valves

  • The fluid resistance is minimal, resulting in reduced wear and erosion caused by the medium.

  • The operation of opening and closing requires less effort.

  • It does not interfere with the flow direction of the medium, preventing spoilage or pressure loss.

  • The design features a simple structure and a short face-to-face dimension.

Flanged Gate Valve Installation

  • Prior to valve installation, verify the model, connection size, and ensure the flow direction of the medium complies with the valve specifications.

  • During the installation process, make sure to leave sufficient space for the valve to operate effectively.

  • The wiring for the drive device should be done according to the provided wiring diagram.

  • Before installation, inspect the valve cavity, sealing surfaces, and other components to ensure they are clean and free of dirt or sand.

  • Tighten the bolts evenly at each connection point.

  •  Assess the packing's tightness to guarantee a proper seal and ensure that the wedge can move freely for opening and closing.

  • Regular maintenance of the gate valve is essential; avoid any collisions or excessive squeezing to prevent compromising the seal.

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