Bell & Gossett 132161 4″ ANSI 125 Flanged Triple Duty Valve, Model 3DS-4B

Description

The Bell & Gossett 132161 Triple Duty Valve (Model 3DS-4B) is a high-performance, multi-function hydronic valve engineered to consolidate four critical functions into a single, compact straight-pattern body. Designed for commercial and industrial hydronic systems, this valve simplifies installation, reduces pipe connections, and lowers overall system cost without sacrificing performance.

Featuring a 4″ ANSI 125 flanged connection, a durable cast iron body, and a bronze seat, the 3DS-4B is built to handle the rigorous demands of modern hydronic heating and cooling applications. The balanced design ensures consistent, reliable operation across a wide range of system pressures and flow conditions.

Four Functions in One Valve

• Soft Seat Nonslam Check Valve – Prevents reverse flow and water hammer without the noise and shock associated with traditional check valves
• Throttling Valve – Allows precise flow adjustment to meet system design requirements
• Calibrated Balance Valve – Provides accurate, repeatable flow balancing with calibrated settings for system commissioning and verification
• Shutoff Valve – Enables complete system isolation for maintenance and service without additional valves

Key Specifications

• Model: 3DS-4B
• SKU: 132161
• Connection Size: 4″
• Connection Type: ANSI 125 Flanged
• Body Pattern: Straight
• Body Material: Cast Iron
• Seat Material: Bronze
• Design: Balanced
• Check Valve Type: Soft Seat, Nonslam

Features & Benefits

• Straight-pattern body for easy inline installation with minimal pressure drop
• Balanced design for stable, predictable valve performance
• Bronze seat provides excellent corrosion resistance and long service life
• Soft seat nonslam check valve eliminates water hammer and system shock
• Calibrated balance valve simplifies system commissioning and TAB (Testing, Adjusting & Balancing) procedures
• Integrated shutoff eliminates the need for a separate isolation valve
• ANSI 125 flanged connections ensure compatibility with standard hydronic piping systems
• Reduces installation time, labor costs, and potential leak points by combining four valves into one

Typical Applications

• Commercial and industrial hydronic heating and cooling systems
• Chilled water and hot water distribution systems
• Pump discharge and system branch connections
• Building mechanical rooms requiring flow balancing and isolation