In spite of fluctuating gas flow rates and inlet pressures in gas pipelines, the spring-loaded gas pressure regulator VGBF with an inlet pressure compensation diaphragm and zero shut-off functions to keep the set outlet pressure constant. A separate safety diaphragm eliminates the need for a purge line. For use in gas inlet sections of the food, paper, and packaging industries as well as in commercial heat generating in all iron, steel, glass, and ceramics industries.