Iwaki LKN Series Mechanical Diaphragm Metering Pump
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.
- Features & Benefits
- Applications
- Product manuals
- Product specs
- 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
- Water treatment chemical feed
- Chemical-process dosing
- Agriculture chemical injection
- Mining chemical feed
- Pulp and paper chemical dosing
- Hazardous-area dosing (with explosion-proof motor)
- Externally controlled dosing via 4-20 mA input
| Max Capacity | 114 GPH (432 L/h) |
|---|---|
| Max Discharge Pressure | 225 psi (1.5 MPa) |
| Max Stroke Rate | 116 strokes/min |
| Wetted / Diaphragm Materials | PVC, PVDF, 316 SS, PTFE + EPDM |
| Connection Sizes | 1/2", 1" |
| Power Supply | 115/230 V, 60 Hz, 1-phase, 1/3 HP |
| Control Options | Inverter / variable speed |
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