Iwaki LK Series Mechanical Metering Pump

The Iwaki LK series is a mechanical diaphragm metering pump built on a worm gear type dual-cam drive. The drive section is compact and rigid and is designed for high wear resistance in continuous operation; a fully enclosed oil bath lubrication system permits outdoor installation. The manufacturer lists water treatment, chemicals, fabrics, paper mills, food processing and medicine among the fields it is suited to. Mikron Proses (Üsküdar, Istanbul) supplies Iwaki pumps in Turkey and provides application consulting on pump selection.

Need a higher-capacity mechanical metering pump? → Send us your requirement

For the wider range of Iwaki dosing pumps, see Iwaki chemical metering pumps.

Four drive bodies and six material types

The model code states the drive power directly. The LK-F series (0.25 kW) covers 0.02-6.0 L/min (sub-models F11 to F57), the LK-A series (0.37 kW) 2.8-9.0 L/min, the LK-B series (0.75 kW) 9.0-13.3 L/min and the LK-C series (1.5 kW) 20.0-45.0 L/min. The permitted maximum pressure falls as capacity rises: the LK-F11 works up to 1.0 MPa (1.5 MPa on SUS types), while the LK-C87 (45.0 L/min) is limited to 0.3 MPa. Six head material types are offered: VC and VH/VS4 (PVC, for acid and alkaline applications), S6 (SUS316, for solvent applications), S4 (SCS13, stainless cast steel equivalent to SUS304) and a fluororesin type (TC). Liquid temperature is 0-50 °C for PVC types and 0-80 °C for SUS316 and SCS13 types; the exact value depends on the chemical.

Construction and accuracy

Motion goes from the gear reduction unit directly to the diaphragm in the pump head, which is economical and versatile. The heart of the drive is the dual-cam system with a large-module worm gear in aluminium bronze and a taper roller bearing, which transmits motor power efficiently to the pump section. A micrometer-type dial with a springback stroke adjustment mechanism allows accurate, repeatable stroke length setting. Discharge accuracy (stability) is stated as within ±2 % FS. From LK-F11 to LK-F47, flange or hose connections are standardized, which gives flexibility in piping; for hose-type LK-F11 to LK-F45 (VC or VH), a siphon preventing valve, a strainer and a 4 m PVC tube are supplied as standard accessories.