Honeywell Automatic Bypass Valve - Angled - 22mm - DU145

The automatic bypass and differential pressure valve controls water flow in the heating circuit according to the water pressure across it and is used to maintain a minimum flow rate through the boiler and to limit circulation pressure when other water paths are closed. A bypass circuit must be installed if the Boiler manufacturer requires one, or specifies that a minimum flow rate has to be maintained whilst the Boiler is firing.

• Maintain minimum flow through a boiler
• Minimises flow noise
• Hinders boiler corrosion
• Differential pressure finely adjustable using indicator scale
• Presetting accessible directly
• Setting value is in meters water column
• No external controls required