Iwaki V Series Hi-Cera Valveless Rotary Plunger Pumps

Iwaki Hi-Cera V is a valveless rotary plunger pump: a compact metering pump built around a ceramic plunger and cylinder. The Hi-Cera V family includes AC-motor models (V-05, V-10 and V-15) and 24 VDC micro-dosing models (V-05 and V-07). This page covers the V-07AEP06 and V-07AFP06, which the catalog lists as high-precision metering pumps optimized for immunoassay analyzers (V-07AEP06) and dialysis machines (V-07AFP06). Mikron Proses provides selection, quotation and application consulting for Iwaki pumps, including the Hi-Cera V series.

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For other Iwaki pumps, see the Iwaki pump range.

Valveless ceramic plunger and cylinder

The valveless construction eliminates the clogging and jamming that commonly occur in conventional metering pumps. The plunger is connected to a drive joint through a special bearing and pin; when the drive joint rotates, the plunger rotates and moves up and down inside the cylinder, and the plunger angle determines the stroke. This removes the need for the valve system used in other pumps.

The main parts, the plunger and cylinder, are machined from ceramic to micron-order precision, which gives the discharge accuracy; both are Al2O3 (alumina ceramic) in the V-07 models, and the pump head is ECTFE (V-07AEP06) or PVDF (V-07AFP06). The V-07AEP06 delivers 0.5-90 mL/min at a maximum pressure of 150 kPa; the V-07AFP06 delivers 0.5-60 mL/min at a maximum pressure of 200 kPa. The pumps run on 24 VDC with a two-phase bipolar stepper motor over a speed range of 5-300 rpm (V-07AFP06) or 10-300 rpm (V-07AEP06). Repeatability is ±1% or below for the V-07AFP06 and ±1.5% or below for the V-07AEP06.

Model	Volume per shot	Flow range	Rotation speed	Repeatability	Max. discharge pressure
V-07AEP06-P01	0.1 mL	0.5-30 mL/min	10-300 rpm	±1.5% or below	150 kPa
V-07AEP06-P02	0.2 mL	1-60 mL/min	10-300 rpm	±1.5% or below	150 kPa
V-07AEP06-P03	0.3 mL	1.5-90 mL/min	10-300 rpm	±1.5% or below	150 kPa
V-07AFP06-P01	0.1 mL	0.5-30 mL/min	5-300 rpm	±1% or below	200 kPa
V-07AFP06-P02	0.2 mL	1-60 mL/min	5-300 rpm	±1% or below	200 kPa

Use and operating notes

Because there are no suction and discharge valves, the pump can discharge directly into a vacuum (negative pressure) at a constant flow without electromagnetic valves, and it maintains a constant flow even when the suction or discharge pressure fluctuates. The accuracy of injection into a vacuum can vary with the piping conditions. Reversing the motor direction reverses the flow without changing the piping. The pump is compact and light, which suits it to micro dosing and precise chemical feeding inside equipment.