Description
For applications demanding maximum corrosion resistance in a compact, efficient package, the Armstrong E7.2B ARMflo Bronze Circulating Pump delivers exceptional performance and durability. This versatile circulator features all-bronze construction throughout its liquid end, making it the ideal choice for domestic water systems, coastal installations, marine applications, and any environment where iron contamination from standard cast iron pumps cannot be tolerated. Its efficient design and corrosion-resistant materials ensure long-term reliability in challenging water conditions.
The pump utilizes Armstrong’s advanced wet-rotor technology, providing quiet, maintenance-free operation while eliminating the need for routine lubrication. The bronze construction offers superior protection against rust and corrosion, significantly extending service life in aggressive water environments. With its compact, inline configuration and standard connection sizes, the E7.2B installs easily in tight spaces while delivering consistent, reliable fluid movement. The wet-rotor design ensures quiet operation, making it suitable for residential applications where noise is a concern. For help with material selection, read our guide on [Choosing Between Bronze and Stainless Steel Circulators].
As part of Armstrong’s respected ARMflo series, this bronze pump continues a tradition of quality that plumbing and HVAC professionals trust for critical applications. Whether maintaining a domestic hot water recirculation loop in a commercial building or ensuring corrosion-free operation in a marine environment, the E7.2B provides the material compatibility and dependable performance needed for long-term system integrity. Learn about its advantages in our article [The Benefits of Bronze Construction in Plumbing Systems].
Technical Specifications
| Specification | Details |
|---|---|
| Model | Armstrong E7.2B ARMflo (182202-644) |
| Motor Power | 1/12 HP (0.08 kW) |
| Connection Size | 3/4″ FIPT x 3/4″ FIPT |
| Impeller Material | Bronze |
| Housing Material | Bronze |
| Max Head | 8 ft (2.4 m) |
| Max Flow | 20 US gpm (76 L/min) |
| Speed Settings | Single Speed |
| Max Operating Pressure | 125 psi (8.6 bar) |
| Max Fluid Temperature | 230°F (110°C) |
| Voltage | 115V, 1-Phase |
| Weight | 6 lbs (2.7 kg) |
Comparison Table: Armstrong Bronze ARMflo vs. Alternative Pumps
| Feature | Armstrong E7.2B Bronze | Standard Cast Iron Circulator | Competitor Bronze Pump |
|---|---|---|---|
| Liquid End Material | All-Bronze Construction | Cast Iron/Bronze Impeller | Bronze |
| Corrosion Resistance | Excellent | Poor | Excellent |
| Application Range | Domestic Water, Coastal, Marine | Closed-Loop Heating Only | Domestic Water, Corrosive |
| Weight | Lightweight | Heavy | Medium |
| Potable Water Approved | Yes | No | Yes |
| Maintenance Requirements | Maintenance-Free | Maintenance-Free | Maintenance-Free |
Frequently Asked Questions (FAQs)
Q1: What applications require a bronze circulator like the E7.2B?
This bronze pump is essential for domestic potable water systems, coastal buildings with salt-laden air, marine applications, swimming pool systems, and facilities with aggressive water chemistry where cast iron pumps would corrode and contaminate the system.
Q2: Is this pump suitable for both heating and domestic water applications?
While its bronze construction makes it perfect for domestic water, it can also be used in heating systems. However, for standard closed-loop hydronic heating applications without corrosion concerns, a cast iron model may be more cost-effective.
Q3: What maintenance does this bronze circulator require?
The pump features a maintenance-free wet-rotor design. The rotor is lubricated and cooled by the system fluid, requiring no periodic lubrication. The primary advantage is the elimination of corrosion-related maintenance concerns that affect cast iron pumps in aggressive environments.
Q4: Can this pump handle high-temperature applications?
Yes, with a maximum fluid temperature of 230°F (110°C), the E7.2B is suitable for most residential and commercial hot water applications, including domestic hot water recirculation and hydronic heating systems.
Q5: How does the corrosion resistance compare to stainless steel models?
Bronze offers excellent corrosion resistance for most water applications, particularly in marine environments, while maintaining compliance with potable water standards. While stainless steel provides broader chemical resistance, bronze is often the preferred traditional material for domestic water systems due to its proven longevity and reliability.
Pros and Cons
| Pros | Cons |
|---|---|
| Excellent Corrosion Resistance for long service life | Higher Initial Cost than equivalent cast iron models |
| Potable Water Approved for domestic water systems | Lower Flow/Head Capacity than larger circulators |
| Maintenance-Free Operation with wet-rotor design | Single-Speed Operation limits performance adjustment |
| Compact Size for easy installation in tight spaces | Premium Price Point for specialized applications |
| Quiet Operation ideal for residential applications | Limited to Specific Applications where bronze is necessary |
| Lightweight compared to cast iron circulators |
Conclusion & Ideal Use Cases
The Armstrong E7.2B ARMflo Bronze Circulating Pump represents the optimal solution for small to medium applications where material compatibility and corrosion resistance are critical to system longevity. While commanding a premium over standard circulators, its all-bronze construction ensures reliable performance in environments that would quickly degrade conventional pumps.
This bronze circulator is essential for:
-
Domestic Water Systems: Hot water recirculation lines in residential and commercial buildings
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Coastal Installations: Facilities near oceanfront or saltwater environments
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Marine Applications: Boat water systems and marine installations
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Laboratory Settings: Where water purity and material compatibility are critical
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Replacement Applications: Updating older systems where iron contamination is a concern
For larger domestic water applications, consider the [Armstrong E24 Series Bronze Circulators], while for standard hydronic heating in non-corrosive environments, cast iron circulators offer better value. The E7.2B fills a critical niche for small-scale applications requiring the superior corrosion resistance of bronze construction.
Contact our plumbing and HVAC specialists today to determine if your application requires bronze construction and for assistance in selecting the right pump for your specific system requirements.
