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Large Guiding Area: The valve plug is closely guided inside the sleeve, providing a much larger guiding area compared to ordinary single-seat or double-seat valves.
Strong Vibration Resistance: This solid guidance significantly reduces vibration and wobble of the valve plug caused by high-pressure differentials and high-flow fluid impact, ensuring stable valve operation and extending service life.
Multi-Hole Design: The sleeve sidewall is typically designed with multiple, specially shaped windows or small holes (multi-stage pressure reduction).
Staged Pressure Reduction: As fluid passes through the sleeve, the pressure is broken down into multiple stages and reduced step-by-step, avoiding the intense energy release that can occur with single-stage pressure reduction.
Effect: This effectively reduces noise and prevents or mitigates damage to valve internals from cavitation and flashing, making it particularly suitable for high-pressure differential conditions.
Large Flow Coefficient (Cv): Since the flow area of the sleeve windows can be designed to be very large, sleeve valves typically have a high flow coefficient and can handle greater flow rates.
Wide Adjustable Range: By altering the shape of the sleeve windows, a wider, linear, or equal percentage flow characteristic can be achieved, meeting a broader range of process control requirements.
Dynamic Pressure Balance: Pressure balance holes are typically designed in the sleeve and plug, causing fluid pressure on the upper and lower sides of the plug to cancel each other out.
Benefits:
Smaller Actuator Thrust Required: Since most of the unbalance force is offset, less air supply pressure is needed to actuate the valve, allowing for the selection of smaller, more economical actuators.
High Shutoff Capability: Even under high pressure differentials, the valve can achieve tight shutoff (especially when paired with a soft seat).
Quick Disassembly and Assembly: The sleeve is typically pressed inside the valve body, allowing the entire trim (plug, sleeve, seat assembly) to be removed from the top without disassembling the valve body.
Modular Design: The trim assembly is easy to replace, making maintenance and overhaul very convenient and significantly reducing downtime.
Interchangeable Parts: By replacing the sleeve and plug with different window characteristics, the valve's flow characteristic or capacity can be changed without altering the valve body, offering great flexibility.
Wide Applicability: Capable of handling control tasks from to high temperatures, low to high pressure, and various corrosive and clean media.
Rugged and Durable: Its robust structural design makes it ideal for heavy-duty applications such as boiler feedwater control, steam pressure regulation, and high-pressure gas transmission.
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