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Alco Controls

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Accessories<br />

Description Type Part No.<br />

Gasket Set for 935 Series Valves X 13455 -1 027 579<br />

Service Tool for 935 Series X 99999 800 005<br />

Steel screws for following flange types:<br />

C501 , 9761 , 6346 , A576 Screw ST 32 803 573<br />

Correction Tables for Series 935<br />

Valve selection for operating conditions other than<br />

nominal conditions:<br />

Q n<br />

= Q o<br />

x K t<br />

x K∆p<br />

Q n<br />

: Nominal valve capacity<br />

Q o<br />

: Required cooling or desuperheating capacity<br />

K t<br />

: Correction factor for evaporating and liquid<br />

temperature<br />

K∆p: Correction factor for pressure drop at valve<br />

Liquid<br />

Correction Factor K t<br />

Temperature R 134a Evaporating Temperature<br />

entering °C<br />

Valve<br />

°C +30 +25 +20 +15 +10 +5 0 -5 -10 -15 -20 -25 -30<br />

+60 1,22 1,25 1,27 1,30 1,33 1,36 1,40 1,44 1,48 1,51 1,56 1,61 1,67<br />

+55 1,14 1,16 1,18 1,21 1,23 1,26 1,29 1,33 1,36 1,39 1,43 1,47 1,52<br />

+50 1,07 1,08 1,10 1,13 1,15 1,17 1,20 1,23 1,26 1,28 1,32 1,36 1,39<br />

+45 1,00 1,02 1,04 1,06 1,08 1,10 1,12 1,15 1,17 1,19 1,22 1,26 1,29<br />

+40 0,93 0,96 0,98 0,99 1,01 1,03 1,05 1,08 1,10 1,12 1,14 1,17 1,20<br />

+35 0,90 0,91 0,92 0,94 0,96 0,97 0,99 1,01 1,03 1,05 1,07 1,10 1,12<br />

+30 0,85 0,86 0,88 0,89 0,91 0,92 0,94 0,96 0,98 0,99 1,01 1,03 1,06<br />

+25 0,82 0,83 0,85 0,86 0,87 0,89 0,91 0,92 0,94 0,95 0,97 1,00<br />

+20 0,80 0,81 0,82 0,83 0,85 0,89 0,88 0,89 0,91 0,92 0,94<br />

+15 0,77 0,78 0,79 0,81 0,82 0,84 0,84 0,86 0,88 0,89<br />

+10 0,75 0,76 0,77 0,78 0,80 0,81 0,82 0,84 0,85<br />

+5 0,73 0,74 0,75 0,76 0,77 0,78 0,80 0,81<br />

0 0,71 0,72 0,73 0,74 0,75 0,76 0,78<br />

-5 0,69 0,70 0,71 0,72 0,73 0,74<br />

-10 0,68 0,68 0,69 0,70 0,71<br />

Correction Factor K∆p<br />

∆p (bar) 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0<br />

K∆p 3,50 2,48 2,02 1,75 1,57 1,43 1,32 1,24 1,17 1,11 1,06 1,01 0,97 0,94 0,90 0,88<br />

∆p (bar) 8,5 9,0 9,5 10,0 10,5 11,0 11,5 12,0 13,0 14,0 15,0 16,0 17,0 18,0 19,0 20,0<br />

K∆p 0,85 0,83 0,80 0,78 0,76 0,75 0,73 0,72 0,69 0,66 0,64 0,62 0,60 0,58 0,57 0,55<br />

A2.5.1/0706/E<br />

77

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