Metal-seated ball valves are a type of valve that utilizes metal sealing rings to achieve hard-sealing between the valve seats. They are specifically designed for harsh conditions, including high temperature, high pressure, corrosive environments, or media containing solid particles.
Structure
Composfed of:
- Valve body
- Valve cover
- Stem
- Ball
- Valve seat
- Sealing ring
Sealing Methods：
- Unidirectional sealing: Seals only in the specified direction (marked on the valve).
- Bidirectional sealing: Seals effectively in both directions.
Structural Types:
- Floating ball design
- Fixed ball design
Characteristics
1. High Temperature and Pressure Resistance:
- The valve seat features a spring- or plate-loaded metal sealing structure, ensuring smooth
operation even at high temperatures.
- The ball and seat undergo special hardening treatments, providing high hardness, wear
resistance, and the ability to withstand extreme pressures and temperatures.
2. Reliable Sealing Performance:
- Metal-to-metal sealing ensures minimal leakage, even under high temperature, high pressure, or corrosive conditions.
3. Easy Operation:
- The valve opens/closes with a 90-degree rotation, offering quick and efficient control.
- Low operating torque and lightweight design facilitate remote and automated operation.
4. Wide Applicability:
- Suitable for corrosive media, high-temperature/pressure gases/liquids, and more.
- Widely used in petroleum, chemical, natural gas, and power industries for demanding applications.
5. Optional Actuators:
- Can be equipped with manual handles, gear operators, electric actuators, or pneumatic
actuators to meet diverse operational needs.
Working Principle
- Spring-loaded sealing: Uniform spring force ensures the valve seat ring forms a tight seal with the ball
surface.
- Auxiliary sealing: The spring force expands auxiliary seals, achieving a leak-proof connection between
the valve body and seat.
- Sealant injection system: For low-pressure conditions, a sealant injection system can be integrated
between the seat and ball.
Applications
- Petrochemical Industry: Transporting corrosive media, high-temperature/pressure gases, and liquids.
- Natural Gas Extraction & Transmission: Ensuring safe and reliable pipeline operations.
- Power Industry: Critical component in steam turbines, boilers, and other key equipment.
- Metallurgical Industry: Ideal for high-temperature, high-pressure, and highly corrosive processes.
- Water Treatment & Environmental Engineering: Used in wastewater treatment, seawater desalination,
and other applications to ensure water quality safety.