| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure which can improve product yield of a flowmeter main body, percentage of defect-free product and excellent of a multiple box type flowmeter by a simple main body configuration. SOLUTION: A forging method is applied to a molding method of a flowmeter main body 1, which is provided with an aperture 7 introducing a functional part including an impeller, an inlet and a discharge vent connected with an external guide pipe which are installed in the upstream side and the downstream side, respectively. Inside the main body, an accommodating member accommodating the functional part is installed. An inlet area hole 19 into which fluid introduced from the inlet 1A is introduced and a discharge vent area hole 2D to which fluid flowing in the accommodating member 13 is discharged are installed in the accommodating member. A regulating part which prevents the fluid from passing a gap between the accommodating part and the main body and flowing from the inlet port to the discharge vent is formed.
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