Multi-stage pressure reduction cage guided control valve

Body: WCB, CF8, CF8M, CF3M
Body type: cage guided
balanced trim structure
balanced seal ring structure(normal temperature)
metal seal ring structure (high temperature)
Ends: Flange, SW
Seat: PTFE
Size: 1/2″ – 16″ (15mm – 400mm)
End connections:
ASME B16.34 class 150-600
DIN PN16-PN100
Actuator: pneumatic actuator, electric actuator

    Category: Control valve


    Multi-stage pressure reduction control valve features a cage guided structure and pressure balanced plug, making it ideal for high differential pressure conditions and applications prone to flash evaporation and cavitation. Designed with various pressure reduction cages, Cage control valve forms a multi-stage pressure reduction trim tailored to specific parameters. These cages prevent flash evaporation and cavitation by gradually reducing high inlet differential pressure through multiple stages of throttling. This ensures that the media always flows above saturated vapor pressure, extending the service life of the control valve in harsh operating conditions.

    Parameters of control valves

    Trim features: cage guided
    balanced trim structure
    balanced seal ring structure(normal temperature)
    metal seal ring structure (high temperature)
    Body type: straight-through type  /  angle type
    Bonnet type: standard type
    heat dissipation type
    Flow characteristic: equal percentage
    quick open
    Size: DN40-400(1.5”-16”)
    Pressure class: PN1.6、4.0、6.3Mpa(ANSI 150、300、600LB)
    Leakage class: ASME B16.104 Ⅴ(standard type metal seat)
    ASME B16.104 Ⅵ(shut-off soft seat)
    Pipe connection type: flange type
    butt welding type
    Applicable temperature range: -30C° ~ 260C°(balanced seal ring structure)
    -196C° ~ 550C°(metal seal ring structure)
    Actuator type: pneumatic diaphragm actuator
    pneumatic piston actuator
    electric actuator


    What is cage guided control valve?

    Cage guided control valve is a sophisticated type of control valve designed for precise flow regulation in various industrial applications. The distinctive feature of this valve lies in its cage structure, which surrounds the valve plug and provides stability and guidance during operation.

    multi-stage pressure reduction cage control valve

    These valves are often utilized in high-pressure and severe service applications where reliability and precision are paramount. The robust design and advanced engineering of cage guided control valves make them ideal for industries such as oil and gas, chemical processing, and power generation, where stringent quality standards and operational efficiency are essential.

    Why is a cage used in a control valve?

    The implementation of a cage in a control valve is central to enhancing its performance and reliability, particularly in demanding industrial applications.

    1. Stability and Guidance: The cage structure provides robust mechanical guidance to the valve plug, ensuring stable and precise movement during operation. This stability minimizes the risk of vibration and enhances the accuracy of flow control.

    2. Flow Characterization: The cage acts as a critical element in defining the flow characteristics of the valve. It allows for customized flow patterns, improving the valve’s ability to regulate fluid dynamics effectively across varying operational conditions.

    3. Reduced Wear and Tear: By guiding the valve plug, the cage significantly reduces lateral forces that can cause wear and tear. This leads to an extended service life of the valve components, ensuring long-term durability and reliability.

    4. Tight Shutoff Capability: The design of the cage facilitates a tight shutoff by maintaining proper alignment between the plug and seat. This capability is essential for achieving effective isolation and preventing leakage in critical applications.

    5. Enhanced Pressure Management: In high-pressure environments, the cage helps distribute fluid pressure more evenly across the valve internals. This distribution mitigates the risk of damage due to pressure fluctuations and contributes to safer operational conditions.