Metal Seated Ball Valve
Metal seated ball valves are designed to withstand extreme conditions which demand durability and performance in the applications that involve high temperatures and pressures with the abrasive medium. When contrasted with soft-seated valves, metal seated ball valves seal from metal against metal and thus are ideal for use in areas subject to mining, petrochemical, slurry, pulp, and refining industries. Their robust construction is ideally suited to resist wear and corrosion as well as thermal expansion, all the while assuring reliable sealing and longevity. These ball valves are commonly applied wherever soft seats would be compromised, when dealing with abrasive fluids or extreme high temperatures. They perform in critical operations which provide the least amount of unnecessary maintenance and downtime. These valves, manufactured with precision and made from high-end materials, are a reliable choice for any industry where flow control needs to be reliable and efficient under rigged operating conditions.
| Material Grade | A105,F304,F316, F51,F55 (Duplex Stainless Steel), F22 (Chromium-Molybdenum Steel), and alloys like Inconel (625, 825) or Monel (K500, 400) |
| Size Range | From 1/2″ – 52″ Full Port and Reduced port |
| Pressure Rating | Class 150,Class 300,Class 600,Class 900,Class 1500,Class 2500 |
| Face To Face | ASME B16.10 Long Pattern,Custom to client request. |
| Flange End | ASME B16.5 Raised Face Standard, RTJ Available |
Different Types of Metal Seated Ball Valve
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Metal Seated Ball Valve
Figure 1: Metal seated Ball Valve Assembly
Metal seated ball valves are the superheroes of extreme industrial conditions: built to survive heat, pressure, and abrasives that would cause other to fail. Want fewer breakdowns; want greater efficiency, want valves that last? Read on to learn why they are your ultimate solution.
What is the metal seated valve?
Metal-seated valves are sealed by the contact of two metals; therefore, they can be applied broadly at a higher pressure or temperature than soft-seated types. Also, they last longer than soft-seated types despite external corrosion resistance. Developments in this category include: these valves are considered, in general, to operate High-Pressure products. They have ceramic or other hard alloy coatings; thus, they are suitable for wear resistance. One example is the metal-seated ball valve; this valve uses a ball and a seat that, when brought together, interrupt the escape of fluids. Such valves have applications in oil and gas, chemicals, and power generation, which require extreme temperatures or pressures that are not feasible for slurry applications.
Metal seat Ball Valve Types :
Metal-seat ball valves are meant for extreme conditions, extreme temperatures, abrasive materials, and critical applications. The difference between the soft seated and the metal seated sitting is that in a soft seated sitting, the sealing is maintained with the help of plastic or elastomeric material, while in metal seated sitting, it maintains the sealing with metal-to-metal contact. They are very durable for use in the oil and gas, petrochemical, power generation, and mining industries.
Metal seated Floating Ball Valve
The ball is not fixed and “floats” between the valve seats.
The sealing pressure is achieved when the upstream pressure pushes the ball against the downstream seat.
Best for smaller pipeline applications.
High resistance to wear and tear from abrasive media.
Common applications: steam systems, high-temperature pipelines, and processes involving particles or slurry.
Metal Seated Trunnion Ball Valve
The ball is then fixed in place using trunnions (mechanical anchors).
The valve seats press against the ball, forming a seal.
Minimal effort is needed to operate this valve in high-pressure applications.
This is highly suitable for larger pipelines and systems with pressure variations.
Common applications: oil and gas pipelines, LNG plants, and high-pressure steam lines.
Metal-seated valves: features
Temperatures First
The range of functioning of metal-seated valves normally exceeds 1000°F (538°C).
Special coatings such as tungsten carbide or chromium carbide enhance the resistant to heat.
They are well suited for steam systems, power plants, and molten salt applications in solar energy.
Dirt-carrying Slurries
Were designed to stand up to wear from slurries, sand, or other abrasive particles.
Used in mining, pulp and paper, and chemical processing.
Long Life
Hardened metal seats do not get deformed with time.
Coatings like Hvof High-Velocity Oxygen Fuel coatings provide extra toughness.
Working under Very High Pressure
The ability to operate at pressures greater than 10,000 psi is dependent on design.
Widely applicable for high pressures in oil and gas pipelines.
Fire Safe
This entails particular functional designs whereby the metal seat continues to function even in the case of fire, thus ensuring the integrity of the system.
Meets fire-safety standards such as API 607 or ISO 10497.
Very Low Leakage Rates
Machine cutting along with lapping techniques allow tight shutoffs.
Leak rates are finally as low as Class VI, as per ANSI/FCI standards.
Metal-seated valves: benefits
Metal Seated Valves are few of the advantages.
Withstands Harsh Conditions
Ideal for use in corrosive, abrasive, or high pressure / high temperature environments where soft seated valves fail.
Extend product life of critical systems and take down time and maintenance.
Cost Efficiency Over Time
Though the initial cost is high, it sustains long-term operational expenses as their durability is high.
It saves money by maintaining longer intervals between maintenance or replacement.
Versatility Across Industries
In the oil and gas industries, petrochemical, power generation, mining, and water treatment.
Will handle high pressure steam and abrasive slurries.
Reliable Shutoff Performance
Avoid leakage under extreme conditions, to maintain the system integrity and security.
It reduces the environmental risks in hazardous material leak more.
Automation-Friendly
Seamlessly works with actuators for automating the control in complex systems.
The most efficient automation takes place especially in the case of large pipelines for trunnion mounted designs.
Typical severe service of metal seated ball valves
Metal seated ball valves are used in severe service conditions where high temperature, aggressive fluids or severe conditions make soft seated valves unsuitable. Their robust construction and metal-to-metal sealing make them ideal for the following industries:
Power Generation:
Application includes high temperature steam service such as steam header, turbine by-pass, and superheated steam service where temperature is above 1000°F in power plants.
Oil and Gas Application:
Ideal for use in high pressure applications such as pipelines, separators and flare gas systems, the metal seated ball valves are designed to work under pressures of up to 10,000 PSI and are not affected by corrosive hydrocarbons.
Mining:
Common in slurry lines and in tailings application, they are suitable for abrasive materials such as ore, sand or grit.
Chemical industry:
Some of their applications include acid handling, alkali injection and high corrosion systems where their coatings for instance tungsten carbide offers excellent chemical inertness.
LNG and Cryogenics:
Work effectively in very low temperatures of -320°F for liquefied gas transfer.
These valves are ideal for use in tough conditions to guarantee reliability and reliability.
When it comes to high temperature, high pressure and abrasive environment, metal seated ball valve is a perfect choice. Soft-seated valves used in these industries tend to fail in extreme conditions.
Soft-seated valves are best for low temperature and low pressure applications because they use PTFE for sealing. While, Metal seated valves are used for severe conditions ,when valves are subjected to a combination of high temperature, high pressure, and possibly abrasive or corrosive fluids.
Common ball valve issues include leakage, wear and tear of seals, and difficulty operating due to debris buildup. Regular maintenance and selecting the right valve type for specific conditions can help prevent these problems and ensure optimal performance.