06.09.2015 Views

Alco Controls

Alco Controls

Alco Controls

SHOW MORE
SHOW LESS
  • No tags were found...

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Correction Tables for the Selection of Solenoid Valves<br />

For use with 110 RB, 200 RB, 240 RA and 540 RA Series<br />

Valve selection for operating conditions other than<br />

nominal:<br />

Q n<br />

:<br />

K t<br />

:<br />

K∆p:<br />

Q o<br />

:<br />

Q n<br />

= Q o<br />

x K t<br />

x K∆p<br />

Nominal valve capacity<br />

Correction factor for evaporating and liquid<br />

temperature<br />

Correction factor for pressure drop at valve<br />

Required cooling capacity<br />

The pressure drop can be calculated with the<br />

following formula:<br />

Q 0<br />

2<br />

∆ P 0<br />

= ∆P n* __<br />

Q n<br />

2<br />

∆ P n<br />

= 0,15 bar<br />

∆ P n<br />

: Pressure drop under nominal conditions<br />

1. Suction Gas Application<br />

Evaporating<br />

Correction Factor K t<br />

Temperature Condensing Temperature °C<br />

°C +60 +55 +50 +45 +40 +35 +30 +25 +20<br />

+10 1,03 0,97 0,92 0,88 0,84 0,80 0,76 0,74 0,71<br />

0 1,40 1,32 1,25 1,20 1,14 1,10 1,04 1,01 0,96<br />

-10 1,71 1,62 1,53 1,47 1,40 1,34 1,27 1,23 1,18<br />

-20 2,20 2,08 1,97 1,88 1,80 1,72 1,64 1,58 1,51<br />

-30 2,79 2,63 2,50 2,39 2,27 2,19 2,07 2,01 1,92<br />

-40 3,68 3,47 3,29 3,15 3,00 2,89 2,73 2,65 2,53<br />

Correction Factor K∆p<br />

∆p (bar) 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45 0,50 0,55<br />

K∆p 1,73 1,22 1,00 0,87 0,77 0,71 0,65 0,61 0,48 0,55 0,52<br />

2. Liquid Application<br />

Liquid<br />

Correction Factor K t<br />

Temperature R 134a Evaporating Temperature °C R 22<br />

entering Valve<br />

°C +10 0 -10 -20 -30 +10 0 -10 -20 -30 -40<br />

+60 1,33 1,40 1,48 1,56 1,67 1,26 1,30 1,38 1,38 1,44 1,50<br />

+55 1,23 1,29 1,36 1,43 1,52 1,19 1,22 1,29 1,29 1,34 1,39<br />

+50 1,15 1,20 1,26 1,32 1,39 1,12 1,15 1,21 1,22 1,26 1,30<br />

+45 1,08 1,12 1,17 1,22 1,29 1,06 1,08 1,15 1,15 1,18 1,23<br />

+40 1,01 1,05 1,10 1,14 1,20 1,01 1,03 1,09 1,09 1,12 1,16<br />

+35 0,96 0,99 1,03 1,07 1,12 0,96 0,98 1,03 1,03 1,06 1,10<br />

+30 0,91 0,94 0,98 1,01 1,06 0,92 0,94 0,99 0,98 1,01 1,04<br />

+25 0,86 0,89 0,92 0,95 1,00 0,88 0,89 0,94 0,94 0,96 0,99<br />

+20 0,82 0,85 0,88 0,91 0,94 0,84 0,86 0,90 0,90 0,92 0,95<br />

+15 0,78 0,81 0,84 0,86 0,89 0,81 0,82 0,87 0,86 0,88 0,91<br />

+10 0,75 0,77 0,80 0,82 0,85 0,78 0,79 0,83 0,83 0,85 0,87<br />

+5 0,74 0,76 0,78 0,81 0,76 0,80 0,79 0,81 0,83<br />

0 0,71 0,73 0,75 0,78 0,73 0,77 0,77 0,78 0,80<br />

-5 0,70 0,72 0,74 0,74 0,74 0,75 0,77<br />

-10 0,68 0,69 0,71 0,72 0,71 0,73 0,74<br />

Correction Factor K∆p<br />

∆p (bar) 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45 0,50 0,55 0,60 0,65 0,70 0,75<br />

K∆p 1,73 1,22 1,00 0,87 0,77 0,71 0,65 0,61 0,58 0,55 0,52 0,50 0,48 0,46 0,45<br />

86 A2.5.1/0706/E

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!