Description
Bell & Gossett 115129 Suction Diffuser Plus Overview
The Bell & Gossett 115129 Suction Diffuser Plus is a high-performance pump accessory engineered to optimize flow conditions at the inlet of centrifugal pumps in hydronic and HVAC systems. By combining a suction diffuser, start-up strainer, and inlet vane assembly into a single compact unit, this component eliminates the need for multiple fittings and simplifies installation while improving pump efficiency and longevity.
Key Features
- 10″ flange system-side inlet x 10″ flange pump-side outlet connection
- Cast iron body construction for durability and long service life
- Steel inlet vanes and orifice cylinder for optimized flow conditioning
- Includes 16 mesh bronze start-up strainer to protect pump from debris during commissioning
- Rated for 250°F (121°C) operating temperature
- Centrifugal pump suction diffuser design reduces turbulence and improves NPSH conditions
- Eliminates the need for long straight pipe runs on the pump suction side
Product Specifications
- SKU: 115129
- Brand: Bell & Gossett
- System Side Connection: 10″ Flange
- Pump Side Connection: 10″ Flange
- Body Material: Cast Iron
- Inlet Vanes & Orifice Cylinder Material: Steel
- Start-Up Strainer: 16 Mesh Bronze
- Maximum Operating Temperature: 250°F
- Type: Suction Diffuser Plus
Benefits & Applications
The Bell & Gossett 115129 Suction Diffuser Plus is ideal for commercial and industrial hydronic heating and cooling systems where pump protection and optimal suction conditions are critical. The integrated start-up strainer captures pipe scale, weld slag, and other construction debris before it can damage pump internals — a must-have during system commissioning. Once start-up is complete, the strainer can be removed for full, unrestricted flow. The steel inlet vanes straighten and condition incoming flow, reducing cavitation risk and extending pump seal and impeller life. The cast iron body ensures reliable performance across a wide range of system pressures and temperatures up to 250°F, making it well-suited for high-temperature hydronic applications.
Why Choose Bell & Gossett
Bell & Gossett is a trusted name in hydronic system components, known for engineering products that maximize system efficiency and reliability. The 115129 Suction Diffuser Plus reflects that tradition — combining multiple functions into one robust assembly that saves installation time, reduces potential leak points, and delivers consistent pump protection for the life of the system.
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