Bell & Gossett 113247 Differential Pressure Valve, DB-3/4

Description

The Bell & Gossett 113247 is a DB-Series Differential Pressure Valve designed to maintain consistent differential pressure across hydronic heating and cooling systems. By automatically bypassing excess flow when system demand decreases, this valve protects pumps, prevents noise, and ensures balanced distribution throughout the piping network — making it an essential component in variable-flow hydronic installations.

Overview

Bell & Gossett’s DB-Series differential pressure valves are engineered for use in closed-loop hydronic systems where variable-speed pumping or zone control creates fluctuating pressure conditions. The DB-3/4 features a 3/4″ connection size, making it well-suited for residential and light commercial hydronic applications. Its self-actuating design requires no external power source, responding automatically to changes in system differential pressure to maintain stable, efficient operation.

Key Features

• Self-actuating differential pressure bypass valve — no external power required
• 3/4″ connection size for versatile hydronic system integration
• Protects circulator pumps from low-flow and dead-head conditions
• Reduces system noise caused by excess pressure differentials
• Ideal for variable-flow and zone-controlled hydronic systems
• Compact, durable construction from Bell & Gossett — a trusted name in hydronic solutions
• Easy installation in bypass piping configurations

Applications

• Residential and light commercial hydronic heating systems
• Variable-speed pump installations
• Multi-zone hydronic distribution systems
• Chilled water and hot water closed-loop systems

Why Choose Bell & Gossett?

Bell & Gossett has been a leader in hydronic system components for decades, delivering reliable pumps, valves, and accessories trusted by mechanical contractors and engineers worldwide. The DB-Series differential pressure valve reflects that legacy of quality — providing automatic, maintenance-free pressure management to keep your system running at peak efficiency.