Beretta Gas valve Sit 845 SIGMA 0.845.108

The Beretta Sit 845 SIGMA 0.845.108 is a gas valve designed for use in Beretta boiler equipment. It controls gas pressure and prevents incorrect gas flow into the combustion chamber, ensuring safe boiler operation. The valve operates with parallel-connected solenoid locking coils, opening when voltage is applied from the boiler control board. It includes a minimum gas supply regulator and a servo system for outlet pressure regulation. In case of gas or electricity supply interruption, a spring automatically closes the valve.

Parts of this type are selected by matching the valve's model and specifications to the boiler's requirements. Before ordering, verify the valve's compatibility with the boiler's control board and gas type. Installation should be performed by a qualified technician, ensuring proper alignment and sealing of connections.

Common failures include the valve not opening or closing properly, leading to gas flow issues. Symptoms may include the boiler failing to ignite, irregular flame, or pressure fluctuations. Check the valve's electrical connections and diaphragm for damage or blockage.