Iwaki LKN Series Mechanical Diaphragm Metering Pump

The Iwaki LKN Series is the workhorse of the Iwaki metering pump family — a motor-driven, mechanically actuated diaphragm metering pump rated to 114 GPH (432 L/H) and 225 PSI (1.5 MPa) for the most demanding industrial chemical-feed duties. A micrometer-dial springback stroke-adjustment mechanism (lockable, 10–100% adjustable) delivers accurate, repeatable setpoints, while a dual-cam drive with built-in worm-gear speed reducer, aluminum-bronze worm gear, and tapered roller bearing transmits motor power efficiently for continuous operation.

Totally enclosed fan-cooled motors mount vertically to save space, with optional explosion-proof and DC variable-speed motors enabling external 4-20 mA control. The LKN is the proven choice for water treatment, chemical process, agriculture, mining, and pulp-and-paper installations.

Capacity to 114 GPH (432 L/H), pressure to 225 PSI (1.5 MPa)
Lockable micrometer-dial stroke adjustment — 10–100% range, accurate and repeatable setpoints
Dual-cam drive with worm-gear speed reducer — aluminum-bronze worm gear and tapered roller bearing for efficient torque transmission
Compact, rigid mechanism — maximum wear resistance in continuous-duty service
Totally enclosed fan-cooled motors — vertically mounted to save panel space
Explosion-proof motor option for hazardous-area installations
DC variable-speed motor option — external control via 4-20 mA input signal
Mechanically actuated diaphragm architecture — proven workhorse design across decades of industrial service