For large commercial and industrial hydronic systems demanding robust performance and reliability, the Bell & Gossett E9034S 2AAB Series e90 pump delivers exceptional circulation power in a service-friendly inline package. This heavy-duty 2 HP circulator is engineered to handle high-flow, high-head applications in large buildings, central plants, and industrial processes where continuous operation is critical. Its advanced design builds upon the legendary Series 90 legacy while incorporating modern efficiency and reliability improvements.
The pump features a durable cast iron construction with a bronze impeller, ensuring long service life in demanding closed-loop systems. The high-efficiency wet-rotor design operates quietly while eliminating coupling alignment issues and reducing maintenance requirements. With three manual speed settings, system engineers can precisely fine-tune performance to match specific system curves, optimizing hydraulic characteristics and operational efficiency. The compact inline configuration saves valuable mechanical room space while providing easy installation between pipe flanges. For system design guidance, read our blog on [Sizing Circulators for Large Commercial HVAC Systems].
As the modern successor to the iconic Series 90, the e90 series maintains the same flange dimensions and performance characteristics while offering improved motor technology and bearing systems. Whether serving as a primary loop pump in a high-rise building or providing circulation in an industrial process, the E9034S 2AAB delivers the proven performance that mechanical engineers have trusted for decades. Learn about its evolution in our article [From Series 90 to e90: The Evolution of a Commercial Workhorse].
Technical Specifications
| Specification | Details |
|---|---|
| Model | Bell & Gossett E9034S 2AAB (179280LF) |
| Motor Power | 2 HP (1.5 kW) |
| Connection Size | 2-1/2″ Flange x 2-1/2″ Flange |
| Impeller Material | Bronze |
| Housing Material | Cast Iron |
| Max Head | 72 ft (22 m) |
| Max Flow | 300 US gpm (1136 L/min) |
| Speed Settings | 3-Speed (Manual) |
| Max Operating Pressure | 175 psi (12.1 bar) |
| Max Fluid Temperature | 230°F (110°C) |
| Voltage | 208-230/460V, 3-Phase |
| Sound Level | < 68 dBA |
Comparison Table: B&G e90 vs. Alternative Commercial Pumps
| Feature | B&G E9034S 2AAB e90 | Competitor A (Base-Mounted) | Competitor B (Inline ECM) |
|---|---|---|---|
| Design & Footprint | Inline, Space-Saving | Base-Mounted, Larger Footprint | Inline, Compact |
| Efficiency | High (Wet-Rotor Design) | Standard | Premium (Variable Speed) |
| Control Flexibility | 3-Speed Manual | Often Single-Speed | Fully Variable |
| Serviceability | Good (Cartridge Replacement) | Excellent (Component Access) | Moderate |
| Initial Cost | Competitive | Higher | Premium |
| Ideal Application | Large Commercial HVAC | Industrial/Plant Applications | Energy-Critical Systems |
Frequently Asked Questions (FAQs)
Q1: What type of applications require a 2 HP circulator like the E9034S?
This pump is designed for large commercial buildings, institutional facilities, central plants, and industrial processes requiring substantial flow and head capacity. Typical applications include high-rise building primary/secondary loops, campus distribution systems, large chilled water systems, and industrial process cooling circuits.
Q2: How does the e90 series differ from the traditional Series 90 pumps?
While maintaining the same flange dimensions and hydraulic performance, the e90 series features improved motor technology for higher efficiency, enhanced bearing systems for longer life, and updated materials for better corrosion resistance. For replacement scenarios, see our guide [Upgrading from Series 90 to e90 Pumps].
Q3: Can this pump be used with variable frequency drives (VFDs)?
Yes, when equipped with a compatible 3-phase motor, the E9034S is ideal for VFD operation. This enables significant energy savings through speed control, soft starting to reduce electrical stress, and precise system matching. For optimized performance, consider our [Bell & Gossett VFD-Enhanced Pump Packages].
Q4: What maintenance does this commercial circulator require?
The wet-rotor design requires no lubrication or mechanical seal maintenance. Primary maintenance involves ensuring clean system water to prevent bearing damage, periodic electrical checks, and monitoring for unusual noise or vibration. The modular cartridge design simplifies any potential service needs.
Q5: Is this pump suitable for both heating and cooling applications?
Yes, the E9034S is designed for closed-loop hydronic systems operating with water or glycol solutions within its published temperature and pressure ratings. It performs effectively in heating systems up to 230°F and chilled water systems for air conditioning applications.
Pros and Cons
| Pros | Cons |
|---|---|
| High-Performance Capability for large systems | Higher Initial Cost than smaller commercial circulators |
| Proven Reliability with B&G engineering heritage | Fixed Speed Operation limits energy savings potential |
| Space-Saving inline design | Heavy Weight requires proper pipe support |
| 3-Speed Flexibility for system balancing | Manual Speed Setting requires physical adjustment |
| Low Maintenance wet-rotor design | 3-Phase Power Required (not for single-phase applications) |
| VFD Compatible for energy optimization | Cast Iron Construction limits use to closed-loop systems |
Conclusion & Ideal Use Cases
The Bell & Gossett E9034S 2AAB Series e90 pump represents the professional-grade solution for large-scale hydronic systems where reliability, performance, and serviceability are paramount. Its balanced combination of proven hydraulic performance and modern efficiency makes it an excellent value for demanding commercial and industrial applications.
This circulator is ideally specified for:
-
Large Commercial Buildings: Office towers, shopping centers, and hospitals
-
Institutional Facilities: University campuses, government buildings, and schools
-
Central Utility Plants: Primary and secondary pumping applications
-
Industrial Processes: Cooling circuits and thermal transfer systems
For smaller commercial applications, the [Bell & Gossett e-80 Series Circulators] offer more appropriate capacity, while for energy-critical applications requiring variable speed, the [Bell & Gossett Ecocirc Series] provides superior efficiency. The E9034S 2AAB fills the critical performance niche for large systems where proven reliability and robust construction outweigh the benefits of premium variable-speed technology.
Contact our commercial HVAC specialists today for application engineering, performance curve analysis, and specification support for your next large-scale hydronic project.
