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Plunger Valve is a precision control valve
The Plunger Valve is a precision control valve designed for regulating flow rates and reducing pressure heads in various fluid systems. Here's a core description of this product:
1. Design and Construction: Plunger valves feature a one-piece, compact body for all diameters, reducing the number of components and eliminating sealing points. They are constructed with high-strength ductile iron bodies, ANSI class 150 to 300, with larger sizes and higher pressure ratings available upon request. Internal components are made of stainless steel for corrosion resistance and long life, especially in sizes 6” to 24”.
2. Advantages: These valves offer operation against pressure-balanced conditions, ensuring efficient flow control. The plunger valve's design provides superior linear flow control characteristics by directing the flow around the inner core within the body, balancing the pressure within the valve and preventing damaging cavitation and vibration.
3. Sealing and Maintenance: The valve features primary and secondary sealing of the shaft by multiple O-ring seals, allowing for maintenance and disassembly in accessible pipelines without dismantling the valve from the pipeline.
4. Flow Characteristics: The plunger valve offers superior linear flow control by converting the rotary movement of the actuator shaft into linear movement, ensuring a well-defined ring-shaped cross-section in every position. This design reliably prevents cavitation damage to the valve and provides a ring-shaped cross-section in every piston position.
5. Drip-Tight Shut-Off: The unique plunger seating profile creates a drip-tight shut-off with a downstream profile ring and a piston O-ring, ensuring maximum service life.
6. Applications: Plunger valves are used in a variety of applications, including agricultural irrigation systems for managing water distribution, pump start-up and control valves, reservoir inlets, bottom outlet valves for dams, turbine bypass, and pressure control and flow regulation.
7. Material and Corrosion Resistance: The valves are made with materials like ductile iron, stainless steel for the plunger, EPDM for the quad O-ring and sealing ring, and bronze for the bushing. The body is coated with high-strength epoxy for additional corrosion protection.
8. Performance: Plunger valves are known for their low operating torque due to pressure balance within the chamber, and they have a low head loss coefficient in the fully open position due to optimized internal body shape.
9. Versatility: They can be actuated by self-locking worm gear with a constant transmission ratio to achieve a linear control curve in connection with an optimal control insert, suitable for both manual operation and electric actuation.
In summary, the Plunger Valve is a robust, precise, and reliable valve designed for linear flow control and pressure reduction, offering a range of features that ensure efficient operation and long-term durability in various industrial and agricultural applications.
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