Walchem EZ Series Metering Pump

Compact and Cost-Effective Chemical Injection

The Walchem EZ Series Metering Pump offers precise chemical injection with advanced microprocessor control at an affordable cost. Its compact size and user-friendly design make it ideal for water treatment and OEM applications.

The EZ Series delivers outputs up to 6.3 GPH (24 L/h) and a maximum pressure of 150 PSI (10 Bar). With a turndown ratio of 360:1, the pump provides high-resolution chemical feed, eliminating slug-feeding effects. Simple operation with just three push-button controls ensures versatility and ease of use in both industrial and municipal applications.

Data Sheet
Manual
Walchem EZ Series Metering Pump

Benefits of the EZ Series Metering Pump

The EZ Series Metering Pump is designed for precision, reliability, and long-term performance, making it an ideal choice for demanding water treatment and chemical injection applications.

Key Benefits:

  • High-Speed Performance: The EZ Series operates at 360 strokes per minute, delivering high-resolution chemical feed. Its fast operation helps eliminate slug feeding and reduces diaphragm wear, ensuring more consistent and reliable chemical dosing than slower-speed alternatives.
  • Engineered for Longevity: Built with dual bearing support, the EZ Series ensures proper axial movement for the armature and shaft, reducing wear and extending diaphragm life even at 360 strokes per minute. This design guarantees long-term durability and minimal maintenance.
  • Superior Check Valve Performance: Featuring dual check valve assemblies with precision ball guides and tapered seats, the EZ Series ensures the valve balls fully seat and seal with every stroke. This results in faster priming and improved overall reliability for consistent chemical injection.
  • High Compression Ratio: A high compression ratio improves the pump’s ability to prime and vent, particularly important when handling off-gassing products like Sodium Hypochlorite. The EZ Series’ design minimizes the dead volume in the pump head, ensuring proper feed for challenging applications.
The combination of speed, longevity, and superior performance makes the EZ Series an excellent choice for water treatment and OEM applications requiring precise chemical dosing.

EZ Series Metering Pump Models

Model Options:

Model Max Output Capacity Max Output per Stroke Max Pressure Connection Size
B11 0.6 GPH (2.3 L/h) 0.01 mL 150 PSI (10.3 Bar) 3/8″ O.D.
B16 1.5 GPH (5.7 L/h) 0.03 mL 100 PSI (6.9 Bar) 3/8″ O.D.
B21 3.2 GPH (12.1 L/h) 0.05 mL 50 PSI (3.4 Bar) 3/8″ O.D.
B31 6.7 GPH (25.4 L/h) 0.1 mL 30 PSI (2.1 Bar) 1/2″ O.D.
B36 4.0 GPH (15.1 L/h) 0.07 mL 100 PSI (6.9 Bar) 1/2″ O.D.

Liquid End Materials:

  • FC: PVDF (for high chemical resistance)
  • PC: GFRPP (general-purpose applications)
  • VA: PVC (standard liquid end material)
  • VE: PP (for viscous fluids)

Specifications of the EZ Series Metering Pump

Electrical Specifications

ModelPower ConsumptionMax CurrentVoltage Range
EZ20 Watt (avg)0.8 Amp115 VAC ±10%, 230 VAC ±10%
EZB20 Watt (avg)1.2 Amp115 VAC
EZC22 Watt (avg)1.2 Amp115 VAC

Operating Conditions

  • Ambient Temperature: 32°F to 122°F (0°C to 50°C)
  • Relative Humidity: 30% to 90% non-condensing
  • Liquid Temperature:
    • PVC Liquid Ends: 32°F to 104°F (0°C to 40°C)
    • PP, PVDF, SS Liquid Ends: 32°F to 140°F (0°C to 60°C)

Shipping Weight

  • EZ: 8 lbs. (3.6 kg)
  • EZB: 10 lbs. (4.5 kg)
  • EZC: 10 lbs. (4.5 kg)

Safety Certifications

  • NSF/ANSI Standard 61 Certified
  • Tested by Intertek to UL and CSA Standards