Masoneilan 78400/18400 Series LincolnLog

The Masoneilan LincolnLog is the premier high-pressure liquid-letdown valve in the process control industry.

It is a field proven severe-service solution for cavitating and erosive applications in various industries. The LincolnLog is uniquely designed to operate reliably in harsh environments and dirty liquids.


  • Sizes: 1” through 8”
  • ANSI Ratings: Class 600 through 2500
  • ANSI Leakage: Class IV, V or VI
  • Cv Range: 0.5 to 135
  • Materials: Carbon steel, 316 stainless steel, chrome-moly, others
  • Connections: RFF, RTJ, socket weld, butt weld, threaded-print flanges (forgings)
  • Actuators: Spring-diaphragm, pneumatic cylinder


Cavitating and erosive applications in various industries

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