The Larner-Johnson® valve is a high-precision plunger (needle) type flow control valve designed for in-line pressure regulation and flow modulation across its full operating range. Commonly deployed in dam, reservoir and hydropower systems, it enables accurate throttling and enhanced energy dissipation in critical water infrastructure applications.
Uniquely suited for free discharge control, the Larner-Johnson® valve operates effectively under higher upstream pressures than conventional Fixed Cone valves, making it ideal for scenarios demanding high-performance discharge control, noise reduction and long service life.
Series 3137:
Inline-Regulating
Series 3168:
Pressure Sustaining
Size Range:
3" - 100";
DN15 - DN2500
Material:
Ductile iron,
Cast Steel &
Aluminium Bronze
Pressure Rating:
Up to 50 bar
Medium Velocity Discharge Capability:
Up to 12m/sec
