The Iwaki EWN-series pumps are electronically controlled solenoid driven metering units capable of highly accurate and easily controlled chemical dosing. Manual, semi-automatic or fully automatic control is possible by combining suitable inbuilt control modules.
Additional safety accessories are available for extra security when used in the most critical applications.
Materials
Wetted materials including PVC, ceramic, PTFE, 316 s/steel, Hastelloy C, GFRPP and PVdF are available to handle nearly all chemical solutions. Tubing connections are used for fast and easy installation.
Control Modes EWN-R / EWN-Y EH-E Series
The standard EWN-R model now combines complete functionality for either manual or automatic operation in a single range: Manual capacity control with either auto stop or external pulse, or; Programmable automatic control from either 4-20mA, preset counter or proportional pulse. Pulse divide/multiply functions with alarm output (EH-E only), flow detection and failure alarm, flow readout in either litres/hr or strokes/min.
Capacities
10 12 models cover maximum capacities from 0.7 2.28 to 75.0 litres/hour & discharge pressures up to 10 bar. Turndown range of 720:1 up to 9001800:1 (depending on model) is available using a combination of manual stroke length and automatic stroke frequency control.
Additional variants for specific requirements
EWN-A type – with high compression / automatic degassing pump head for gassing chemicals such as sodium hypochlorite.
EWN-Y type – includes all the features of the standard EWN-R, plus the capability of self-calibrating, real-time flow readout when used with the EFS flow sensor incorporating feedback control. Simple flow monitoring functions can be achieved using the optional FCM or FCP flow checkers to detect abnormal flow conditions. Alarm and analogue output functions as standard provide additional options for flow verification.
The EWN-A auto degassing valve can be combined with the EWN-Y with EFS for a completely self-calibrating, self-degassing solution with automatic fast-prime capability
Accessories
Anti-syphon loading valves, flow detection with alarm output, automatic degassing valves, various tubing connections.
