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EWN Series Pumps (0.0-6.7 gph, up to 250 psi) EWN-R Series Electromagnetic Metering Pumps

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Walchem
$522.90
SKU:
EWN
Weight:
14.00 LBS

 Product Description

The EWN-R Series electronic metering pumps offer superior high speed
dosing capability with more standard features. The flexibility of the EWN-R
pump enable it be integrated into virtually any chemical feed application using
a universal-voltage, digital controller with an expanded set of control features.
Superb valve performance and advanced solenoid engineering combine to
make a highly precise pump for the most demanding applications.

EWN 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, the EWN pump
prime in seconds and hold prime reliably.

Control Options

EWN-R On/Off with 0-360 digital speed control, external stop/start, programmable 4-20mA input and digital pulse input with pulse multiplier/divider control. (Standard)

EWN-Y ON/OFF with 0-360 digital speed control, external stop/start, programmable 0-20mA input, digital pulse input with pulse multiplier/divider/Batch control and auxiliary input override. Use with EFS sensor for flow measurement and pump control or with PosiFlow for feed verification. Internal totalization and 0-20mA output for feedback.

NOTES:
1) All pumps include a Manual Air Vent Valve with the exception of the FC and SH-N Liquid Ends .
2) All pumps include one foot valve, one injection valve, 20ft. of polyethylene tubing and a ceramic weight with the exception of SH Liquid Ends. (E90495 Input connectors supplied with EWN-Y pumps, sold separately for EWN-R pumps)
3) FC and SH pumps have "NPTF connections. FC pumps are supplied with additional tubing compression fittings.
4) PA/TA Liquid ends use AFLAS® o-rings and PCTFE Seats.
5) The Multi-Function Valve is made of PVDF/FEPM/PTFE materials.
6) High Pressure pumps are supplied with NPTM discharge fittings as well as tubing connections.

Please see product specification sheet below for more detailed descriptions.

 

High Speed Performance

E-Series pumps operate up to 360 strokes-per-minute with adjustments in 1 spm increments, providing high resolution
chemical feed. Adjustable stroke length further increases the ability to refine output, making the E-Series one of the most
versatile solenoid metering pumps on the market.

Multi-function Digital Controller
The controller in the EWN-R pump provides for flexible pump control including scalable Analog control, Digital Input
with both Multiply and Divide capability, external stop control, or simple speed and stroke length control. Display
can be adjusted between flow rate units or % speed for easy-to-read output and quick adjustment. The controller is
universal voltage so it can be used anywhere in the world.

Engineered Longevity
All E-Series 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-Series 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.

Flexible Connections
A removable tubing insert provides flexibility of tubing sizes and eliminates twisting of the
tubing during connection. A threaded insert can be used in place of the tubing adapter to
easily convert any connection to NPT.

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-Series pumps feature a very high compression ratio that ensures proper feed especially with off-gassing
products (i.e. Sodium Hypochlorite).

For additional information, and choosing the correct pump for your application, please review the
 http://enviroaqua.com/content/media/pdficon_small.gif Product Specifications Sheet.

If you have any questions or need assistance in selecting the correct pump for your application, please don't hesitate to contact EnviroAqua at (800) 853-0311.

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