SMC Networks PFMC7501-L Operation Manual page 95

●Straight inlet piping length and accuracy (reference value)
The smaller the piping size, the more the product is affected by the straight piping length.
The smaller the flow rate, the less the product is affected by the straight piping length.
The straight piping length shall be 8 cm or longer in order to maintain ±3%F.S. of the specification.
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No.PF※※-OMY0002