Key Benefits and Advantages
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Advanced Debris Protection: The LR125 is built to thrive in “dirty” liquid service. It features a specially engineered flow path that naturally deflects debris and particulates away from the seating area. Additionally, an internal stainless steel inlet strainer captures large particles before they can enter the main valve, significantly reducing the risk of seat damage and erosion.
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Metal Plug Design: By utilizing a rugged metal plug instead of a flexible boot or sleeve, the LR125 eliminates common disadvantages like rubber degradation, tearing, or inconsistent performance in cold temperatures. This ensures a much longer service life and more reliable tight shutoff.
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Smooth and Quiet Operation: The pilot-operated mechanism provides highly stable control, preventing the “hunting” or pressure surges often seen in direct-operated liquid valves. This leads to smoother system operation and reduced water hammer effects.
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In-Service Travel Indicator: A visual travel indicator is a standard feature on the LR125. This allows maintenance crews to verify the valve’s position and monitor performance in real-time without taking the unit out of service or depressurizing the line.
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Thorough Laboratory Testing: Fisher products undergo rigorous flow and endurance testing in state-of-the-art labs. This ensures that the published flow capacities and pressure ratings are accurate and can be relied upon for critical system sizing.
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Easily Maintained Pilot: The regulator is paired with a pilot that is designed for simplicity. It can be easily adjusted and serviced in the field, ensuring that the main valve continues to operate at peak precision with minimal downtime.
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Tight Shutoff: The combination of precision machining and high-quality seating materials allows the LR125 to provide a bubble-tight shutoff, preventing downstream pressure creep during periods of no flow.
Technical Properties
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Operation: Pilot-operated pressure reducing.
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Media: Liquids (Water, Liquid Fuels, Industrial Fluids).
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Body Sizes: Available in standard sizes for industrial headers, typically NPS 1 through NPS 8.
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Max Inlet Pressure: Designed to handle high-pressure industrial and utility liquid lines.
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Temperature Range: Suitable for a wide range of standard liquid process temperatures.
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End Connections: Available in flanged configurations (ANSI/ASME) for easy integration into existing piping.
Field of Application
The Type LR125 is the premier choice for liquid systems where reliability and debris resistance are the highest priorities.
Primary Industries and Uses:
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Water Distribution: Pressure management in municipal and industrial water mains.
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Liquid Fuel Systems: Controlling the delivery pressure of fuel oils for large boilers and generators.
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Fire Protection Systems: Maintaining stable pressures in high-volume water headers.
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Mining and Process Industry: Regulating process water or chemical fluids that may contain small amounts of scale or solids.
