EW Series Metering Pumps0 pages

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).