Automatic Check Valve AZ 440, AZ 450 for Pipeline Protection

Return gates are used as uncontrolled, automatically acting protective devices used in pipeline systems. They are intended for prevention of reverse flow of working medium on technological pipelines of oil and gas producing and oil and gas processing industry, power engineering and municipal services, as well as for unloading of pipelines from excessive hydrostatic pressure. Operating characteristics, material of manufacture, type of connection, control body depend on technical requirements.