Explain:
    This series collects all kinds of connection forms and structural couplings, nipples, nozzles, rotary couplings, thermowells and other products in the automatic control instrument pipeline system. It is an essential connecting piece in the pipeline with a wide range of varieties, specifications and applications. The internal thread type pipe joint YZG7 series is applicable to various measuring pipelines of automatic control system. All threads in this series are British taper pipe threads, with a minimum of ZG1/4"and a maximum of ZG1/2".