1. Does standard throttle unit have those? What advantage does standard throttle unit have? (the Sun Huaiqing in Wangjian)

Answer: Sunlight the technical condition design that regulation of GB/T2624-2006 of level of 糏 SO5167 and ISO9300, state sunlights when the collect before Meng of pa of beard of Zou of look forward to exhibits  , make, used throttle unit, need not wet mark can decide capacity coefficient and error. Accord with a condition now in close have in conduit: Standard orifice plate, standard nozzle, the standard is in charge of in article grave, standard comparing is mandatory, nozzle of standard velocity of sound, spray pipe of standard velocity of sound; Bright canal in have: Standard lasher (lasher of Bao Biyan, triangle, rectangular lasher, wide top lasher) . The technical requirement that does not need wet mark to be able to set according to the standard commonly is finished from the design, make, installation, use process.

Must satisfy following requirements:

The suitable scope with affirmatory 1) , include condition of dimension of medium, geometry, flow, hydromechanical parameter (Reynolds number, viscosity, pressure, temperature) , thermodynamic parameter (content sex and condition) , installation condition, data collects means to reach use method;

The mathematical model with affirmatory 2) , include the discharge formula, consideration that concerns coefficient each, especially the computation of capacity coefficient;

The geometrical condition with affirmatory 3) , conduit caliber (close conduit) ; Channel width (bright canal) ;

4) installs a condition certainly, the spot affects flow each element condition;

The inaccuracy with affirmatory 5) spends computation surely, add inaccuracy spends computation surely (if need) ;
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