Walchem EZB11D1-VCA – EZ Series Metering Pump, 0.5 GPH (30 mL/min), 150 PSI, PVC Head / FKM Seals, Auto Degassing Valve, 115VAC
Original price was: $614.00.$465.20Current price is: $465.20.24% OFF
The Walchem EZB11D1-VCA is a compact, solenoid-driven electronic metering pump from the EZ Series, built for precise, low-flow chemical injection in water treatment applications. Rated to 0.5 GPH (30 mL/min) at up to 150 PSI, it features a PVC head with FKM (Viton) seats and seals, making it well suited for a broad range of common water treatment chemicals.
This model includes a factory-installed Auto Degassing Valve (ADV), which automatically vents trapped gas from the pump head — improving priming reliability and dosing accuracy for chemicals that tend to off-gas, without requiring manual bleeding.
Powered by 115VAC with microprocessor-based manual speed control (1–360 strokes per minute, 360:1 turndown ratio), the EZB11D1-VCA is easy to operate with simple push-button controls and delivers consistent, low-pulsation feed for small-capacity dosing applications.
Technical Specifications
| Specification | Details |
|---|---|
| Model | Walchem EZB11D1-VCA |
| Series | EZ Series |
| Type | Solenoid-Driven Electronic Metering Pump |
| Max Output | 0.5 GPH (30 mL/min) |
| Max Pressure | 150 PSI (1.0 MPa) |
| Control Module | Manual speed adjustment, 1–360 SPM (360:1 turndown ratio) |
| Power Supply | 115VAC, 50/60 Hz (230V not available for EZB pumps) |
| Liquid End Material | PVC Head / FKM (Viton) Seats & Seals |
| Valve Ball | Ceramic |
| Diaphragm | PTFE-Bonded EPDM |
| Special Feature | Factory-Installed Auto Degassing Valve (ADV) |
| Connection Size (OD x ID) | 3/8″ x 1/4″ |
| Included Accessories | Foot Valve, Injection Valve, 20 ft. LLDPE Polyethylene Tubing, Ceramic Weight |
| Spare Parts Kit | N11VCA-PK |
| Certifications | UL, CSA, NSF/ANSI Standard 50 & 61 |
| Warranty | 2-Year “Bumper-to-Bumper” |
Precise Low-Flow Chemical Feed with the Walchem EZB11D1-VCA
The Walchem EZB11D1-VCA is a metering pump built for accurate, low-flow chemical dosing. It’s part of Walchem’s EZ Series. The pump uses microprocessor-based speed control. It also has a rugged, dual-bearing design. This keeps the diaphragm lasting longer and the output steady.
Operators set the feed rate with a simple manual dial. The dial covers a 360:1 turndown ratio. This gives both coarse and fine dosing from one small pump. It works well for cooling towers, boilers, and small treatment skids. In these settings, slug-feeding can throw off water chemistry. This pump avoids that problem.
This model ships with a PVC head and FKM (Viton) seats and seals. These materials work with many common water treatment chemicals. Examples include calcium hypochlorite, sodium hypochlorite, and corrosion or scale inhibitors. Always check chemical compatibility before you order.
The -VCA configuration adds one key feature: a factory-installed Auto Degassing Valve. It replaces the standard manual air vent valve. Many treatment chemicals release gas inside the pump head over time. This can cause air-lock and uneven dosing. The Auto Degassing Valve clears that trapped gas on its own. It keeps the pump primed and dosing accurately. No operator action is needed. This cuts down on maintenance calls and improves reliability for unattended sites.
Every EZB11D1-VCA ships as a full kit. It includes a foot valve, an injection valve, 20 ft. of LLDPE tubing, and a ceramic suction weight. That’s everything needed for a standard install.
Water Treatment Supply carries the Walchem EZB11D1-VCA. It’s a strong fit for cooling towers, boilers, RO pretreatment, and other industrial jobs that need compact, accurate, low-flow chemical dosing.
Technical Parameters of the EZB11D1-VCA
Pump Performance & Construction
- Turndown Ratio: 360:1 for both coarse and high-resolution dosing from one pump
- Dual Bearing Support: Armature and shaft supported on both ends for stable stroke motion and extended diaphragm life
- Dual Check Valve Design: Precision ball guides and tapered seats in both suction and discharge for reliable priming
- Auto Degassing Valve (ADV): Automatically vents off-gassing chemicals from the pump head to maintain prime and dosing accuracy
Use Cases & Industry Applications:
- Cooling Towers: Low-flow biocide, scale, and corrosion inhibitor dosing for small to mid-size systems.
- Boiler Water Treatment: Precise chemical feed for oxygen scavengers, amines, and alkalinity control.
- OEM & Skid-Mounted Systems: Compact footprint suited for integration into packaged water treatment equipment.
- General Industrial Water Treatment: Low-capacity, high-accuracy dosing wherever slug-feeding must be avoided.
No replacement parts listed for this item yet.
FAQs
- What is included with the Walchem EZB11D1-VCA metering pump?
The pump ships complete with a foot valve, injection valve, 20 ft. of LLDPE polyethylene tubing, and a ceramic suction weight — ready for standard installation. - What does the Auto Degassing Valve on this pump do?
It automatically vents gas that accumulates in the pump head from off-gassing chemicals, maintaining prime and consistent dosing without manual bleeding. - What chemicals is the PVC/FKM liquid end compatible with?
PVC/FKM (VC) liquid ends are compatible with a wide range of common water treatment chemicals. Contact Water Treatment Supply to confirm compatibility with your specific chemical before ordering. - Is this pump available in 230V?
No — 230V is not available for EZB-size pumps in the EZ Series; this model is 115VAC only. - What is the maximum output and pressure of this pump?
The EZB11D1-VCA is rated to 0.5 GPH (30 mL/min) at up to 150 PSI.
You must be logged in to post a review.
Frequently Purchased Together
Customer Reviews / Ratings
There are no reviews yet.