Liquid supply regulation unit, comprises primary and secondary control valves, primary , secondary and tertiary liquid connections, and control circuitry

摘要

An arrangement for controlling and/or regulating a supply of liquid, comprises a primary control valve (1), a secondary control valve (2), a primary liquid supply connection (3), a secondary connection for liquid removal, and a tertiary connection for liquid return. The liquid is controlled by electronic circuitry (6) which consists of a module that detects deviations and controllers (7,8) for the regulating valves. An arrangement for controlling and/or regulating a supply of liquid, comprises a primary control valve (1), a secondary control valve (2), a primary liquid supply connection (3), a secondary connection for liquid removal, and a tertiary connection for liquid return. The liquid is controlled by electronic circuitry (6) which consists of a module that detects deviations and controllers (7,8) for the regulating valves. Each valve has a regulator which can be independently controlled. The regulators are PID and software regulators. In the non-powered state, the primary valve is closed and the secondary valve is open.