Alco Controls

Available upon special request
• Power assembly with solder connection for
external pressure equalization
• Non-standard connection sizes see page 80.
Accessories
Type
Part No.
Gasket Set for L Series Valves X 13455 -1 027 579
Service Tool for L Series X 99999 800 005
Steel screws for following flange types:
C501 , 9761 , 6346 , A576 Screw ST 32 803 573
9152, 9153, 10331 , 10332 Screw ST 48 803 574
Correction Tables for Series L
Valve selection for desuperheating of
suction gas:
The required desuperheating capacity Q des
has to be
multiplied with the correction factors on page 68.
Valve selection for desuperheating of suction gas
in conjunction with hotgas-bypass regulation:
The required bypass capacity Q Byp
has to be multiplied
with correction factor K ti
per table below.
Q des
x K t
x K∆p = Q n
Q des
: Required desuperheating capacity
K t
: Correction factor for evaporating and
liquid temperature
K∆p : Correction factor for pressure drop at valve
Q n
: Nominal valve capacity
Q Byp
x K ti
= Q n
Q Byp
: Required bypass capacity
K ti
: Correction factor for evaporating
temperature
Q n
: Nominal valve capacity
Condensing Temperature Refrigerant
Correction Factor K ti
Bubble point Evaporating Temperature °C
°C +10 +5 0 -10 -20 -30 -40 -50
R 22 0,33 0,36 0,40 0,47 0,56 0,66 0,78 0,93
+50 R 407 C 0,41 0,45 0,49 0,58 0,69
(R 407C: +54 dew point) R 134a 0,38 0,42 0,44 0,54 0,64
R 507 / R 404A 0,50 0,54 0,59 0,70 0,83 0,98 1,18 1,38
R 22 0,26 0,29 0,32 0,38 0,46 0,55 0,66 0,78
+40 R 407 C 0,32 0,35 0,39 0,46 0,55
(R 407C: +45 dew point) R 134a 0,31 0,33 0,36 0,44 0,52
R 507 / R 404A 0,38 0,42 0,45 0,54 0,64 0,76 0,90 1,08
R 22 0,20 0,22 0,25 0,31 0,38 0,46 0,55 0,66
+30 R 407 C 0,25 0,28 0,31 0,37 0,45
(R 407C: +35 dew point) R 134a 0,24 0,26 0,29 0,35 0,43
R 507 / R 404A 0,29 0,32 0,35 0,42 0,51 0,60 0,72 0,86
R 22 0,15 0,17 0,19 0,25 0,31 0,38 0,46 0,56
+20 R 407 C 0,19 0,21 0,24 0,30 0,37
(R 407C: +26 dew point) R 134a 0,18 0,20 0,22 0,28 0,35
R 507 / R 404A 0,22 0,25 0,27 0,33 0,40 0,48 0,58 0,70
Correction factors based on 20K superheat suction gas at the
inlet of compressor, discharge temperature 28K above isentropic
compression and 1K subcooling.
A2.5.1/0706/E
75