Construction:The valve seat and gate (wedge) are made of metal, typically stainless steel, carbon steel, or other hard alloys.

The valve body can be made from materials like cast iron, ductile iron, carbon steel, stainless steel, or other alloys, depending on the application requirements.

Sealing:Metal-to-metal sealing provides high strength and durability.The sealing surfaces are often hard-faced with materials like stellite or other hard alloys to enhance wear resistance and longevity.

Pressure and Temperature Ratings:Metal Seated Gate Valves are capable of handling high pressures, often ranging from Class 150 to Class 2500 or higher, depending on the design and application.They can operate at high temperatures, typically up to 500°C (932°F) or more, making them suitable for steam, hot water, and other high-temperature services.

Applications:These valves are widely used in industries such as oil and gas, petrochemical, power generation, water treatment, and mining.They are suitable for applications where high durability and resistance to abrasive or corrosive media are required.

Advantages:High durability and long service life due to the metal-to-metal sealing.Suitable for high-pressure and high-temperature applications.Can handle abrasive and corrosive fluids.

Disadvantages:Higher torque required for operation compared to resilient seated valves due to the metal-to-metal contact.

More expensive than soft-seated valves due to the materials and manufacturing process.

Maintenance:Regular inspection and maintenance are required to ensure the integrity of the sealing surfaces.Reconditioning or replacement of the sealing surfaces may be necessary over time due to wear.

In summary, a Metal Seated Gate Valve is a robust and durable valve suitable for demanding applications involving high pressure, high temperature, and abrasive or corrosive fluids.