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Choice ABV

Automatic Bypass Valve

Benefits This quality automatic bypass valve controls water flow in the central heating circuit according to the water pressure across it, maintaining a minimum flow rate through the boiler and limits circulation pressure when TRV’s or other water paths are closed. This prevents your system from “cycling”.

Features • High capacity flow up to 50 litres per minute • Adjustable differential pressure range 0.1 to 0.6 bar • 22mm compression fittings for ease of installation

• Ensures constant flow through boiler • Reduce system noise and maintain an even system pressure

Applications TRV’s slowly close down after each radiator raises the room temperature. To overcome flow restrictions as TRV’s close down, the ABV is adjusted to the required set point. As the system resistance increases due to TRV’s closing, the ABV allows flow to increase, in order to maintain the required pre-set system differential pressure. The regulation provided will reduce system noise that can result from TRV’s or zone value is closing, eliminate pump impeller wear that can result from high flow resistance, and enhance the life of the boilers heat exchanger by ensuring minimum flow rate at all times.

Choice ABV - Automatic Bypass Valve

Technical Data Maximum Working Pressure:

3 bar

Maximum Working Temperature:


Flow Capacity:

3m /hr

Differential Pressure Range:

0.1 to 0.6 bar

Valve Body Material:





System with stored hot water


System with combi boiler

Technical Helpline: 01475 745131 CUSTOMER CARE POLICY As part of Sangamo’s continuous improvement program, the Company operates a Customer Care Policy. This means that we welcome your comments and complaints, as it can only help us to improve our services to you, our customer.

Sangamo Limited, Industrial Estate, Port Glasgow, Renfrewshire PA14 5XG Tel: 01475 745131 Fax: 01475 744567 Email : Web: Certificate Q05237

Certificate EMS 80426


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