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Grundfos CR 90 - Page 19

Grundfos CR 90
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 (BG)
19
5.2   
  . 333     
    
 .
5.3    
     

CR, CRI, CRN 1s  20 CR, CRN 32  150
. 3    
  
     (CIP)  CRI CRN
     H EPDM  , HxxE,
   150 °C   15 .
 CR, CRI, CRN      
   120 °C    
.
5.4   
. 4     CR 
    "" 
   :
H=p
b
x 10,2 - NPSH - H
f
- H
v
- H
s
p
b
=   bar.
      
 1 bar.
  p
b
 
 bar.
NPSH =     (NPSH)
  .
   NPSH   . 331  -
    .
H
f
=      
  - ,   .
H
v
=     ,  . E,
. 336. t
m
=   .
H
s
=  =  0,5  .
    "" , 
     ,   
""  .
    "H" , 
   "H"  .   
  ,   
  "H".

p
b
= 1 bar.
  : CR 15, 50 Hz.
: 15 m
3
/h.
NPSH ( . 331): 1,1  .
H
f
= 3,0   .
  : +60 °C.
H
v
( . E, . 336): 2,1  .
H = p
b
x 10,2 - NPSH - H
f
- H
v
- H
s
[ ].
H = 1 x 10,2 - 1,1 - 3,0 - 2,1 - 0,5 = 3,5  .
 ,       
  3,5  .
  bar: 3,5 x 0,0981 = 0,343 bar.
  kPa: 3,5 x 9,81 = 34,3 kPa.
5.5   
  . 334   
 .     +
    ( )  
 -     . A, . 333.
     1,5  - 
,   . B, . 334.
Указание
   
     
   .
Указание
       
.
TM03 8853 4907

 


[kW]
.  
 [°C]
HQQE 0,37 - 45 -40 - 120 °C
HBQE 55-75 0-120 °C
HQQV 0,37 - 45 -20 - 90 °C
HBQV 55-75 0-90 °C
Указание
    +120 °C
     
   .
-60 -40 -20 0 20 40 60 80 100 120 140
0
5
10
15
20
25
30
35
p [bar]
HQQE/V
HBQE/V
H
Q
Q
E
H
Q
Q
E
H
B
Q
E
H
Q
Q
V
H
Q
Q
E
t [°C]
TM02 0118 3800
Hv
H
NPSH
Pb
Hf

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