Walchem EJ Series Metering Pumps
Outputs 3.2 GPH (12.0 LPH) and a maximum pressure of 175 PSI
The Walchem EJ Series metering pumps offer reliable chemical dosing with universal voltage capability, allowing operation from 100-240VAC across the globe. These pumps are compact, easy to use, and designed for versatile applications. With outputs up to 3.2 GPH (12.0 LPH) and a maximum pressure of 175 PSI (1.2 MPa), the EJ Series delivers performance and precision without breaking the budget.
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Overview
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Ordering Information
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Specifications
Key Benefits
High-Speed Performance: With 360 strokes-per-minute, the EJ Series delivers precise chemical dosing and exceptional turndown capability, minimizing diaphragm wear and improving control.
Universal Voltage Compatibility: Designed to operate at any AC voltage, ensuring global compatibility and easy integration into diverse systems.
Advanced External Control: Features built-in digital inputs and Stop/Start controls for proportional dosing or On/Off operation, offering flexibility for various applications.
IP65-Rated Protection: Durable, water-resistant housing shields the pump from harsh environments, while a clear cover safeguards the digital display and keypad from liquids.
Ordering Information
When ordering, please use the model number breakdown to specify the exact configuration needed for your application.
Model Number Breakdown
| Component | Code | Description |
|---|---|---|
| Drive Unit Symbol | EJ | Standard drive unit |
| Max Capacity | B11, B16, B21, B31, B31-L | Varies based on model, ranging from 0.6 GPH to 6.7 GPH |
| Diaphragm Diameter | 10.6mm, 19mm, 31mm | Dependent on model |
| Liquid End Material | VC, TC, TA, PF, SHN | Various material options such as PVC, PVDF, GRPP, 316SS |
| Valve Code | CE, AF | Materials for the valve seat, options include CE and AF |
| O-Ring | EPDM, FKM | Options include EPDM, FKM |
| Valve Ball | CE, AF, 316SS | Options for the valve ball, including CE, AF, and 316SS |
| Gasket | PTFE | Standard PTFE |
| Diaphragm | PTFE | Standard PTFE diaphragm for durability |
Specifications
| Specification | Details |
|---|---|
| Model | B11, B16, B21, B31, B31-L |
| Max Capacity (GPH) | B11: 0.6, B16: 1.5, B21: 3.2, B31: 6.7, B31-L: 5.4 |
| Max Pressure (PSI) | B11: 150, B16: 100, B21: 60, B31: 30, B31-L: 150 |
| Stroke Rate (SPM) | Up to 360 |
| Power Consumption | 22 Watts (Avg) |
| Diaphragm Diameter | B11/B16: 10.6mm, B21/B31: 19mm, B31-L: 31mm |
| Weight | 8.8 lbs (4 kg approx.) |
| Power Supply | 100 to 240VAC, 50/60Hz, Single Phase |
| Ambient Temperature | 32°F to 104°F (0°C to 40°C) |
| Liquid Temperature (PVC) | 32°F to 104°F (0°C to 40°C) |
| Liquid Temperature (PP or PVDF) | 32°F to 140°F (0°C to 60°C) |