Fisher™ Type LR125 Pressure Reducing Liquid Regulator

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The Fisher Type LR125 is a pilot-operated pressure reducing regulator specifically engineered for liquid service in industrial and commercial applications. Paired with the Type MR95H or MR95HP pilot and a Type 112 restrictor, the LR125 delivers smooth, precise operation, tight shutoff, and extended service life. Its metal plug and engineered flow path deflect debris, minimizing internal wear and protecting the seat from erosion. An internal inlet strainer further reduces the risk of damage by blocking large particles from entering the valve.

Features and Benefits

Reliable Tight Shutoff
• The LR125 utilizes a metal plug and diaphragm assembly—eliminating the common failure points of flexible-element regulators. When closed, the diaphragm is firmly seated against a tapered-edge cage for secure shutoff. When open, the plug deflects particles away from the diaphragm, enhancing erosion resistance and ensuring long-term shutoff performance.

Built-in Debris Protection
• The specially engineered flow path guides liquid and debris through the valve without striking the seat directly. Combined with the integrated inlet strainer, this feature protects internal components and reduces maintenance frequency.

High Accuracy Pressure Control
• The Type MR95H and MR95HP pilots offer multiple control ranges. The precision of pilot-operated control results in tight regulation and stable downstream pressure.

Extended Service Life
• The robust metal plug, flow-optimized body design, and fully supported diaphragm (in both open and closed positions) ensure long-term durability and minimize wear. The diaphragm avoids “setting,” a common issue with flexible designs, enabling consistent performance over time.

Full Flow Utilization
• All Fisher™ regulators are tested in Emerson’s advanced flow laboratories. Operators can confidently use 100% of the published capacity without performance compromise.

Lab-Tested Reliability
• Each new design undergoes extensive laboratory validation for strength, flow behavior, shutoff integrity, and material compatibility, ensuring reliable field performance.

Simple In-Line Maintenance
• The top-entry design allows internal inspection, cleaning, and part replacement without removing the valve from the pipeline. No special alignment is required during reassembly, reducing service downtime.

Efficient O-Ring Sealing
• Elastomer O-rings are used in place of traditional gaskets, reducing maintenance time and improving ease of assembly.

Optional Travel Indicator
• A built-in travel indicator precisely tracks diaphragm and plug movement, allowing real-time monitoring of valve position. Ideal for troubleshooting, inspection, and remote status indication.

Versatile Design

The LR125 uses Emerson’s standard E-body, compatible with both ASME and EN end connections.

• MR95H pilot: Handles inlet pressures up to 300 psig (20.7 bar), outlet range 15–150 psig (1.0–10.3 bar)

• MR95HP pilot: Supports up to 600 psig (41.4 bar), outlet range 15–400 psig (1.0–27.6 bar)

Quick Pilot Maintenance
• The MR95 series pilot is designed for easy in-line access, enabling fast trim inspection and part replacement.

Corrosion-Resistant Finish
• Carbon steel models are protected with a durable powder paint coating, offering excellent resistance to impact, abrasion, and corrosion.

Hydrogen Ready
• The LR125 has been tested for hydrogen service, including evaluations for material compatibility, leakage, permeation, and resistance to embrittlement. Approved configurations are suitable for hydrogen gas applications.

PART NUMBER
• GE12727X022
• 19B2401X022
• 18B2126X022
• 18B5955X012
• 19B0781X022
• 19B0782X022
• 18B8501X022
• 18B8502X022

Specifications

Temperature Capabilities
• 17E68 Nitrile (NBR):?-20 to 150°F / -29 to 66°C | 17E97 Nitrile (NBR): 0 to 150°F / -18 to 66°C | 17E88 Fluorocarbon (FKM): 0 to 250°F / -18 to 121°C

Body Sizes
• NPS 1 / 2 / 3 / 4 | DN 25 / 50 / 80 / 100

End Connections
• NPT / SWE / CL150RF / CL300RF / CL600RF / PN 16/25/40

Maximum Inlet Pressure
• 600 PSIG / 20.7 bar | Or body rating limit, whichever is lower

Maximum Outlet Pressure
• 400 PSIG / 27.6 bar | Or body rating limit, whichever is lower

Spring Ranges
• 15 to 400 PSIG / 1.0 to 27.6 bar

Additional Technical Data
• For additional technical information,?contact?your local?Sales Office?or refer to technical documentation.

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Bulletins: LR125 Pressure Reducing Liquid Regulator Bulletin, Fisher-EN.pdf