Electronic Metering Pumps EWN-R Series
From Walchem Corporation

EWN-R Series Electronic Metering Pumps

• 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 pne of the most versatile solenoid metering pumps on the market.

• 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).
  

EWN-R Series Electronic Metering Pumps Downloads

	Specifications		Dimensions
	EWN-R Brochure		EW-Y Manual
	EWN-R Manual		A & E Spec
	Tech Tip: Wiring an automatic backup pump		EW-F Manual