EW Series Metering Pumps
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An Iwaki America Company EW Series | Metering Pumps OVERVIEW EW Series electronic metering pumps offer superior dosing capability. The versatile control features enable the EW to be integrated into virtually any chemical feed application. Superb valve performance and advanced solenoid engineering combine to make a highly precise pump for the most demanding applications. EW pumps have outputs to 6.7 GPH (25.2 l/h) and a maximum pressure of 250 PSI (17 bar). The high speed of operation results in high resolution chemical feed and long service life. Quiet and compact, EW pumps prime in seconds and hold prime reliably. SUMMARY OF KEY BENEFITS High Speed Performance E-Class pumps operate at 360 strokes-per-minute, providing high resolution chemical feed. Most competitive products operate at slower speeds, resulting in slug feeding, accelerated diaphragm wear and poor feed control. Engineered Longevity All E-Class pumps feature dual bearing support. The armature and shaft are supported with a bearing on each end, which ensures proper axial movement, enabling the E-Class to operate at 360 SPM while extending the life of the diaphragm. Superior Check Valve Performance Dual Check Valve Assemblies in both suction and discharge fittings feature precision ball guides and tapered seats. Precise machining and molding of parts limit valve ball travel, ensuring that balls fully seat and seal with every stroke. This superior check valve design guarantees fast priming and reliable performance. High Compression Ratio The compression ratio of a metering pump is important because it affects the pump’s ability to prime and vent. The compression ratio is raised when you reduce the dead volume of the pump head during operation. All E-Class pumps feature a very high compression ratio that ensures proper feed especially with off-gassing products (i.e. Sodium Hypochlorite).

IP65 Construction The rugged Polyphenylene Oxide (PPO) enclosure is equipped with a durable clear cover to protect the membrane switches and stroke control of the pump, which are mounted opposite the liquid end. The display utilizes a high temperature LCD that provides extra protection from sunlight in outdoor applications. PVC GFRPP PVDF 316SS Control Features All EW Series pumps come equipped with pulse and stop input/output control. Feed Accuracy - Powered by the E-Class 360 Stroke-Per-Minute technology, the EW has an incredible turndown ratio of 1800:1 ensuring precise feed control for...

Electrical Specifications Operating Conditions PR PVDR SS liquid ends: Relative Humidity: Liquid Temperature: Safety Performance The EW Series metering pumps are tested by Intertek to UL and CSA standards. They are certified by NSF International to NSF/ANSI Below 32°F (0°C), pump is limited to 70% of maximum pressure. Liquid cannot freeze. 1. Addition of a Multifunction valve increases overall length by 0.37". Addition of an Auto Air Vent Valve increases overall length by 1.59" 2. Addition of a Multifunction Valve increases discharge height by 0.22". No change for the Auto Air Vent Valve....

ORDER INFORMATION Capacity/Pressure Rating PUMP SERIES EW = IP65 electronic metering pump with external pulse control or manual speed control (adjustable to 360 strokes per minute) and manually adjustable stroke length. (Turndown ratio 1800:1) CAPACITY/PRESSURE RATING See chart on this page CONTROL MODULE F = For use on all EW models, features digitally adjustable speed and external pulse input control, stop & pre-stop Y = For use on all EW models, features analog input, digital input w/multiply & divide, PosiFlow input and alarm outputs. See chart on this page A = Auto Air Vent Valve...