Walchem EZB11D1-VCA Metering Pump → Now the EWP-035BVC07A-USL
Original price was: $614.00.$465.20Current price is: $465.20.24% OFF
This model has been upgraded. The Walchem EZB11D1-VCA has been discontinued and replaced with the EWP-035BVC07A-USL, its direct 1:1 equivalent — same PVC wet end, same connection size, and fully compatible spare parts.
Purpose-built for off-gassing chemicals like sodium hypochlorite, this pump’s Auto Degassing Valve automatically vents trapped gas from the pump head, preventing vapor lock and maintaining consistent output. It delivers 0.6 GPH at up to 150 PSI, with durable PVC construction for excellent chemical resistance.
The upgraded model now features an 1800:1 turndown ratio (up from 360:1) for finer dosing control and an IP66-rated housing for added protection. Already have an EZB11D1-VCA installed? Your spare parts kit (N11VCA-PK) remains fully compatible — no need to requalify your stock.
Technical Specifications
| Specification | Details |
|---|---|
| Model | EWP-035BVC07A-USL (replaces EZB11D1-VCA) |
| Flow Rate | 0.6 GPH (35 mL/min) |
| Pressure Rating | Up to 150 PSI (1.0 MPa) |
| Pump Type | Diaphragm metering pump with Auto Degassing Valve |
| Wet End Material | PVC pump head |
| Valve Balls / Seat | FKM |
| Connection Size | ⅜” OD x ¼” ID |
| Power Supply | 100–240V AC (universal) |
| Control Type | Manual dials (Stroke Rate / Stroke Length) |
| Turndown Ratio | 1800:1 |
| Ingress Protection | IP66 (water/dust-proof) |
| Special Feature | Auto Degassing Valve — for off-gassing chemicals |
| Recommended For | Sodium hypochlorite, chlorine, hydrogen peroxide |
| Included | Foot valve, injection valve, 20 ft. polyethylene tubing, ceramic weight |
| Spare Kit | N11VCA-PK |
Precision Dosing with the Walchem EZB11D1-VCA Metering Pump
The Walchem EZB11D1-VCA Metering Pump delivers smooth and consistent chemical dosing through high-speed 360 SPM solenoid operation. As a result, it eliminates slug feeding, improves accuracy, and reduces diaphragm wear compared to slower-stroke pumps.
In addition, the PVC degas head prevents gas buildup and maintains reliable dosing when handling volatile or off-gassing chemicals. At the same time, the dual-bearing armature support stabilizes internal movement, which reduces vibration and extends diaphragm life.
Operators can easily adjust output using manual stroke controls. This allows flow regulation from zero to 100% of rated capacity. Consequently, chemical usage is optimized, maintenance needs are reduced, and overall system efficiency improves.
Available through Water Treatment Supply, the Walchem EZB11D1-VCA combines durability, precision, and ease of use, making it an excellent choice for water treatment and industrial chemical feed applications.
Use Cases & Industry Applications
- Sodium Hypochlorite Dosing — The Auto Degassing Valve makes this pump ideal for bleach/hypochlorite injection, preventing vapor lock caused by natural off-gassing.
- Disinfection Systems — Reliable, consistent chemical feed for chlorine and hydrogen peroxide dosing in water treatment plants.
- Cooling Towers — Chemical feed for off-gassing biocides and oxidizers without loss of prime.
- Municipal & Industrial Water Treatment — Accurate dosing where off-gassing chemicals are standard practice.
No replacement parts listed for this item yet.
FAQs
Q1. What is the Walchem EZB11D1-VCA used for?
The Walchem EZB11D1-VCA metering pump is designed for precise chemical dosing of off-gassing chemicals — such as sodium hypochlorite and chlorine — in water treatment, disinfection, and process systems. This model now ships as the EWP-035BVC07A-USL, its direct factory replacement.
Q2. What does “VCA” / the degas head mean?
The “A” designates the Auto Degassing Valve — a feature that automatically vents gas bubbles trapped in the pump head, preventing vapor lock when dosing chemicals that naturally off-gas. This same feature is preserved in the EWP-035BVC07A-USL replacement.
Q3. Has the Walchem EZB11D1-VCA been discontinued?
Yes. It has been replaced by the manufacturer with the EWP-035BVC07A-USL, a confirmed 1:1 equivalent per Walchem/Iwaki’s official crossover matrix, including the same auto-degassing function.
Q4. Why is the flow rate lower than the standard EZB11D1-VC?
The Auto Degassing Valve intentionally reduces output by approximately 20% compared to the non-degas version, in exchange for reliable operation with off-gassing chemicals. This tradeoff is unchanged between the EZ and EWP-L versions.
Q5. Will my existing EZB11D1-VCA spare parts still work?
Yes. The spare parts kit (N11VCA-PK) is identical between the EZB11D1-VCA and the new EWP-035BVC07A-USL — no need to requalify your maintenance stock.
Q6. What are the power requirements?
The updated EWP-035BVC07A-USL operates on a universal 100–240V single-phase power supply (upgraded from the original fixed 115V).
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