Honeywell DU146 differential bypass valve

The DU146 Automatic Bypass Valve controls flow of water through a bypass circuit which is typically installed between flow and return pipework on a large system or branch of a district heating system. Building Regulation advice states that if a bypass is installed an Automatic Bypass Valve must be fitted. The DU146 saves energy by only allowing flow through the bypass when needed i.e. when flow through the system is reduced when zone valves or radiator thermostats are closing. The use of an ABV is recommended by the UK government as Best Practice in the CHeSS (Central Heating System Specifications) guide to central heating systems. Options: DU146M High duty construction suitable for district heat schemes Integral pressure indicator for simple setting up Wide differential pressure range 005 to 05 bar Lockable set point adjustment Reduces system noise and maintains an even system pressure Ensures constant flow through boiler or branch of large heating system Lockable set pressure prevents inadvertent adjustment Brand:Honeywell Control Device:Wired Model Number:DU146 Warranty:1 Year