Product Overview
The Bell & Gossett 172953LF is a heavy-duty, end-suction centrifugal pump from the renowned 627T Series 60 line, designed for reliable performance in commercial HVAC and industrial hydronic systems. This specific model is powered by a robust 1-1/2 HP, 1760 RPM motor, making it an ideal choice for moving hot water, chilled water, and condenser water in large buildings, hospitals, schools, and industrial facilities.
Engineered for longevity and serviceability, the pump features a durable cast iron construction, a precision-machined bronze impeller, and a mechanical seal designed for extended life. The “LF” designation indicates a “Long Frame” base, providing greater stability and compatibility with a wider range of applications. As a complete, close-coupled unit, the 172953LF arrives pre-assembled and ready for a straightforward installation, minimizing downtime and labor costs.
Whether you’re replacing a failed unit or specifying a new system, this Bell & Gossett pump delivers the proven performance and dependability that professionals trust for critical circulation duties.
📚 Technical Resources & Guides
Technical Specifications
| Specification Category | Detail |
|---|---|
| Manufacturer Part Number | 172953LF |
| Series | Bell & Gossett 627T Series 60 |
| Motor HP | 1-1/2 HP |
| Motor Speed | 1760 RPM |
| Voltage/Phase | 208-230/460V, 3-Phase (Verify for your application) |
| Connection Size (Flange) | 2-1/2″ x 2″ |
| Connection Type | Flanged (Standard 125# FLG) |
| Maximum Working Pressure | 175 PSI / 12.1 Bar |
| Maximum Temperature | 250°F / 121°C |
| Construction – Casing | Cast Iron |
| Construction – Impeller | Bronze |
| Construction – Shaft | Steel, Stainless Steel Sleeve |
| Seal Type | Mechanical Seal |
| Frame | Long Frame (LF) |
| Rotation | Clockwise (Viewed from motor end) |
What’s Included
| Included | Not Included / Required Separately |
|---|---|
| ✓ Complete Close-Coupled Pump & Motor Assembly | ✗ Circuit Breaker or Starter (Electrical Disconnect) |
| ✓ Flanged Suction & Discharge Connections | ✗ Isolation Valves & Strainer |
| ✓ Mechanical Seal | ✗ Flexible Connectors |
| ✓ Baseplate | ✗ Motor Starter (Recommended for 3-Phase motors) |
🛠️ Recommended for a Complete Installation
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Isolation: Bell & Gossett Flanged Isolation Valves
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Protection: Y-Strainer for Hydronic Systems
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Control: Square D 3-Phase Motor Starter
Comparison Table: 627T Series 60 vs. Alternative Pumps
| Feature | Bell & Gossett 627T Series 60 | Standard Residential Circulator | Basic Industrial Pump |
|---|---|---|---|
| Application | Commercial HVAC, Industrial Hydronics | Residential Heating | General Purpose, Transfer |
| Construction | Cast Iron, Bronze Impeller (Durable) | Often All-Iron or Composite | Varies |
| Serviceability | Excellent (Standardized parts, easy repair) | Often “Throw-Away” Unit | Moderate |
| Motor | NEMA Standard, 3-Phase (Efficient) | Small, Single-Phase | Often TEFC, Single or 3-Phase |
| Pressure/Temp Rating | High (175 PSI, 250°F) | Low ( typically < 100 PSI) | Moderate |
| Ideal For | Heating/Cooling Loops, Boiler Feed | Baseboard Heat, Domestic Hot Water | Water Transfer, Irrigation |
Frequently Asked Questions (FAQs)
Q1: Is this pump suitable for both open and closed-loop systems?
A: Yes, the Bell & Gossett 627T Series is designed for both open and closed hydronic systems. However, for open systems (like cooling tower service), it is critical to ensure the system has a properly sized suestion strainer to protect the pump from debris.
Q2: What does “Close-Coupled” mean?
A: A close-coupled pump has the impeller mounted directly on the extended motor shaft. This design is compact and rigid, eliminating the need for alignment between separate pump and motor bearings. The “Long Frame” (LF) base provides additional stability for this configuration.
Q3: This is a 3-phase pump. Can I use it with single-phase power?
A: No. The motor is wound for 3-phase operation only. Attempting to run it on single-phase power will damage the motor. You must have a 3-phase power supply or use a phase converter. For single-phase applications, you would need to select a different model.
Q4: What maintenance does this pump require?
A: Primary maintenance involves periodically checking for unusual noise or vibration, ensuring the motor bearings are lubricated (if applicable), and monitoring the mechanical seal for leaks. The seal is a wear item and will eventually need replacement.
Q5: How do I select the right pump for my system’s flow and head requirements?
A: Pump selection should be based on your system’s calculated flow rate (in GPM) and total dynamic head (in feet). You must consult the pump performance curve for the 172953LF model to ensure its operating range matches your system’s requirements. Oversizing or undersizing a pump leads to inefficiency and premature failure.
Internal Link: Our guide on How to Read a Pump Curve will help you verify this is the correct model for your application.
Pros and Cons
| Pros | Cons |
|---|---|
| Proven Reliability & Durability: Industry-standard construction for long service life. | 3-Phase Power Required: Not compatible with standard residential single-phase power. |
| Commercial-Grade Components: Bronze impeller and mechanical seal ensure longevity. | Higher Initial Cost: More expensive than residential-grade circulators. |
| Easy Serviceability: Standardized parts are widely available for maintenance and repair. | Heavyweight: Cast iron construction makes it significantly heavier than composite pumps. |
| Long Frame Base: Provides superior stability and reduces strain on connections. | Requires System Knowledge: Proper sizing and installation are critical for optimal performance. |
| Brand Reputation: Bell & Gossett is a leader in hydronic systems with extensive support. |
Conclusion & Ideal Use Case
The Bell & Gossett 172953LF 627T Series 60 pump is a workhorse engineered for demanding commercial and industrial applications where failure is not an option. It represents a professional-grade solution for critical water circulation.
This pump is perfectly suited for:
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Commercial Building HVAC Systems (Chilled and Hot Water Circulation)
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Boiler Feed and Condensate Return Applications
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Industrial Process Cooling Loops
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Condenser Water Pumps for Cooling Towers
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Replacement for existing Series 60 pumps in institutional settings.
If you require a durable, efficient, and serviceable pump for a 3-phase hydronic system, this Bell & Gossett model is a benchmark of quality.
🔗 Official Technical Resource
For the official pump performance curves, dimensional drawings, and installation manuals, always refer to the Bell & Gossett eProduct Catalog for the most accurate and up-to-date technical data.
