Bell & Gossett 115120 Suction Diffuser Plus, 3″ Flange x 3″ Flange, Cast Iron

Description

The Bell & Gossett 115120 Suction Diffuser Plus is a high-performance centrifugal pump accessory engineered to optimize pump inlet conditions, protect system components, and extend equipment service life in hydronic heating and cooling applications.

Designed as a direct-connect solution between the system piping and the pump suction, this unit combines multiple functions into a single compact assembly — eliminating the need for separate elbows, reducers, and start-up strainers. The result is a cleaner installation, reduced pressure drop, and improved pump efficiency from day one.

Key Features

• 3″ Flange System Side x 3″ Flange Pump Side connection for straightforward integration into flanged piping systems
• Cast iron body construction for durability and long service life in hydronic applications
• Steel inlet vanes and orifice cylinder to straighten flow and reduce turbulence entering the pump impeller
• Includes 16 Mesh Bronze Start-Up Strainer to capture construction debris and protect the pump during initial system commissioning
• Rated for 250°F (121°C) operating temperature, suitable for high-temperature hot water systems
• Combines suction diffuser, elbow, reducer, and start-up strainer into one assembly
• Reduces installed cost and minimizes required pipe straight-run at pump inlet

Construction & Materials

• Body: Cast Iron
• Inlet Vanes & Orifice Cylinder: Steel
• Start-Up Strainer: 16 Mesh Bronze
• Connections: 3″ Flange (System Side) x 3″ Flange (Pump Side)

Performance Ratings

• Maximum Operating Temperature: 250°F (121°C)

Application

The Bell & Gossett 115120 Suction Diffuser Plus is ideal for commercial and industrial hydronic systems where pump protection, flow conditioning, and ease of installation are priorities. The integrated start-up strainer captures pipe scale, weld slag, and other construction debris during initial fill and startup, preventing damage to pump seals, impellers, and other precision components. Once commissioning is complete, the strainer can be removed and the unit continues to serve as a permanent flow-conditioning device.

Trust Bell & Gossett’s proven hydronic expertise in every installation. Order the 115120 Suction Diffuser Plus from Jackson Systems for fast shipping and expert support.