Fluorine plastic chemical pump cavitation phenomenon judgment standard

Cavitation phenomenon refers to the liquid flow in the hollow steam bubble formation and burst phenomenon. For the emergence of the phenomenon of cavitation in the centrifugal water pump, scale and influence have different standard of cavitation, cavitation and cavitation of gas and steam are distinguished. Commonly used fluorine plastic chemical pump has the FSB fluorine plastic corrosion-resistant water pump, IHF fluorine plastic chemical centrifugal pump.

generate cavitation phenomenon judgment standard:

low cavitation bubbles from the edge of blade inlet began to appear ( The primary cavitation. NPSH) Until you reach the maximum length of bubbles definition, Such as bubble length 5 mm) 。 In the bubble observation experiments, will be the entrance to the pressure to reduce gradually, until the first visible cavitation bubbles.

low fluorine plastic chemical pump cavitation phenomenon may be caused by cavitation head ( △H) Drop, the biggest decline in value to define delta H = 0. 3 H or often occurs in some speed of screw pump delta H = O. OOH( The initial stage of refers to produce cavitation head down) 。 The corresponding NPSH value using NPSH. And NPSH. To represent.

low fluorine plastic chemical pump cavitation phenomenon may be caused by cavitation efficiency ( △η) The biggest decline in value (down to define Such as delta eta = 0. 03η) 。

low fluorine plastic chemical pump cavitation phenomenon may be caused by cavitation head ( △H) Decline, resulting in failure of lift ( Head) 。

low fluorine plastic chemical pump cavitation phenomenon may be caused by cavitation volute pump corrosion of materials to achieve the greatest degree of the definition of a fixed period of time.

low fluorine plastic chemical pump cavitation phenomenon may be caused by cavitation noise level enhancement, to define the maximum noise levels.

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