The Landis & Gyr VGG10.504PK, now part of the Siemens product family, is a compact double gas valve designed for use in gas-fired burners and gas appliances. It integrates two class A safety shutoff valves into a single, space-saving housing. This model features a quick-opening characteristic and is equipped with a proof of closure switch (overtravel switch) for enhanced safety monitoring. It is suitable for controlling and securing the gas supply in a wide range of heating applications, ensuring reliable performance and compliance with safety standards.