, , , , , . .
, , . , , , , , ( - . .). , .
. , .
, NPSH (net-positive-suction-head). ( net positive suction head () . , , , , , NPSH (, , )
:
- , ;
b - , ;
d - , ;
- , /2;
g - , 9,81 /2;
Vc - , /;
HV,S - , ;
Hz, geo - , .
NPSH , . - ..) NPSH.