Brochure

Emerson Climate Technologies
53
Thermal Expansion Valves
Valve selection for operating conditions other than nominal
conditions:
Q
n
= Q
o
x K
t
x Kp
Q
n
: Nominal valve capacity
Q
o
: Required cooling or desuperheating capacity
K
t
: Correction factor for evaporating and liquid temperature
Kp: Correction factor for pressure drop at valve
Correction Tables for Series 935
Liquid
Temperature
entering
Valve
°C
R134a
Correction Factor kt
Evaporating Temperature (°C)
+30 +25 +20 +15 +10 [phone]
+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
+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
+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
+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
+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
+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
+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
+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
+20 0.80 0.81 0.82 0.83 0.85 0.89 0.88 0.89 0.91 0.92 0.94
+15 0.77 0.78 0.79 0.81 0.82 0.84 0.84 0.86 0.88 0.89
+10 0.75 0.76 0.77 0.78 0.80 0.81 0.82 0.84 0.85
+5 0.73 0.74 0.75 0.76 0.77 0.78 0.80 0.81
0 0.71 0.72 0.73 0.74 0.75 0.76 0.78
-5 0.69 0.70 0.71 0.72 0.73 0.74
-10 0.68 0.68 0.69 0.70 0.71
Correction Factor kΔp
Δp (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
KΔp 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
Δp (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
KΔp 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
230
Spare Parts
Description Type Part No.
Gasket Set for 935 Series Valves X 13455 -1 027 579
Service Tool for 935 Series X 99999 800 005
Steel screws for following flange types:
C501, 9761, 6346, A576
9148, 9149, 9152, 9153, 10331, 10332
Screw ST 32
Screw ST 48
803 573
803 574
Bronze screws for following flange types:
C501, 9761, 6346, A576
9148, 9149, 9152, 9153, 10331, 10332
Screw BZ 32
Screw BZ 48
803 575
803 576
935 Series