Pressure regulator for gas bottles or gas installations including leak protection with pressure compensation, particularly applicable to installations using plastic piping

摘要

The regulator uses a long tube (12) which has an injector (28) at the entry end, a ball type leakage stop valve (30,39) and a conventional pressure regulator (20,22,24,26). The injector (28) embodies a spring loaded (50) sliding tube (42) which under high bottle pressure closes supplementary injector orifices (40) but at low pressure allows them to pass gas with the main nozzle (28''). In either case the ball operates correctly under leakage conditions