Brochure

Emerson Climate Technologies
177
EX Extended Capacity Tables
Application Suction Pressure Regulation
(Evaporating or Crankcase Pressure) - Nominal Capacities (kW)
Valve Type Kv, m3/h R407C R22 R134a R404A
EX6
1.57 3.9 4.1 3.1 3.5
EX7
5.58 14 15 11 13
EX8
16.95 42 45 34 38
The nominal capacity (Qn) is based on the following conditions:
R-134a Extended Capacities (kWatts) EX6-8 Series
Valve Type
Condensing
Temperature °C
Evaporating Temperature (°C)
+10 +5 0 -10 -20
EX6
+60
3 2 2 2 1
EX7
10 9 8 6 4
EX8
30 27 24 18 13
EX6
+50
3 3 2 2 1
EX7
11 10 9 7 5
EX8
34 30 27 21 15
EX6
+40
3 3 3 2 2
EX7
12 11 10 8 6
EX8
38 34 30 23 17
EX6
+30
4 3 3 2 2
EX7
14 12 11 8 6
EX8
41 37 33 26 19
EX6
+20
4 4 3 3 2
EX7
15 13 12 9 7
EX8
45 40 36 28 21
Example:
The EX6 provides 3.5 kW at 0.15 bar pressure drop with R404A or
3.5*1.41=4.9 kW at 0.3 bar pressure drop.
Multiply above nominal capacities by following factors to obtain capacities
at different pressure drops:
Typical Order Package
1) Valve EX6, EX7 or EX8 Plug and cable assembly EXV-M60
2) Controller Kit EXD-U00 Part No. 808 038
∆P, bar
0.10 0.15 0.20 0.30
Correction factor
0.82 1.00 1.15 1.41
Refrigerant Evaporating temperature Condensing temperature Subcooling Pressure Drop
R407C
+4°C (dew point)
+38°C bubble point /
+43°C dew point
1K 0.15 bar
R22, R134a, R404A
+4°C +38°C 1K 0.15 bar
For other operating conditions use Excel-
based Selection Tool (download from www.
emersonclimate.eu) or use the following quick
selection tables.
For biow versions attention should be paid to the
temperature range TS -40°C to +80°C ! The EX6 .. EX8
must be installed with motor downward in suction line
applications. This ensures the valve life expectancy.