The QB1 single-port exhaust valve is mainly composed of a valve body, a valve, an upper cover, a valve stem, a float, an exhaust nozzle, etc. It is used for small-diameter pipelines (4) 50-4 200), it is used as the exhaust function of the pipeline, so that the pipeline will not appear closed gas, air resistance, such as the pump power failure will appear in the pipe at any time negative pressure, automatic suction can protect the safety of the pipeline.
There are two types of connections for this exhaust valve: threaded and flanged