FIELD: measurement technology. SUBSTANCE: measurement diaphragm is set in through slit between parts of case of device joined into inseparable welded structure with preset centering along axis with the aid of two profile rigid bearing sides. Centering of diaphragm is carries out by means of pulling ring cover with internal conical surface. Cover is mounted for longitudinal movement for access to slit and its end face has bevel for creation of support for installation of new diaphragm. EFFECT: provision for enhanced quality of maintenance in process of operation of device in system of gas pipe-line. 2 dwg
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