One, beforeCharacter

ISO 5167:2003 (E) (new standard of the following abbreviation) promulgating is the 2nd milepost on throttle unit phylogeny, and the first milepost is the standard of international of the first ISO 5167 that issued 1980 (old standard of the following abbreviation) . 2 milepost reflect the different level that throttle unit develops, they have the significant change of materiality on technical base and content. How to learn ISO 5167 new standard deep, it is the issue that I often consider, this portion study reading notes was written in continuous study and experience.

After new 2003 standard is promulgated, home has expert scholar to discuss its content and value, ever had held 60~70 according to saying second the seminar that implements new standard, learn a class, regretting is this is with explaining to public ISO 5167 new standard is a name, promote inner cone flowmeter to be solid seminar all right, learn a class, regretting is this is with explaining to public ISO 5167 new standard is a name, promote inner cone flowmeter to be solid seminar all right, learn a class, in these activities, debase standard throttle unit, say people should be brave in in time to renew an idea, measure throttle unit to leave with traditional backward discharge, with when the discharge that all introduces new generation into ground promotion measures throttle unit, namely discharge of inner cone type measures throttle unit. Flowmeter of V form inner cone is old generation orifice plate, of the canal in nozzle and article grave change product.

The author thinks inner cone flowmeter presses flowmeter to have its actor drawback oneself as new-style difference, it still is belonged to nonstandard detect a flowmeter, with standard throttle unit difference pressing flowmeter wants quite low a class, it needs to study via long-term trial and apply practice to promote to a high office for standard type, ability will surely deny the issue that replace definitely, alleging now is standard throttle unit change the product is nodded early rather, carry out new standard to be able to have interference effect only to discharge industry, without what actual profit.
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