Brochure

Emerson Climate Technologies
152
EX Extended Capacity Tables
EX6-8 Nominal capacities (Tons) - as suction pressure regulator (evaporator or crankcase)
Valve Type R-407C R-22 R-134a R-404A
EX6
1.1 1.1 0.9 1.0
EX7
3.8 4.0 3.0 3.5
EX8
11.5 12.2 9.2 10.5
The nominal capacity is based on the following conditions:
Refrigerant Evaporating Temperature Condensing Temperature Subcooling Pressure Drop
R-22, R-134a, R-404A +40°F +100°F 2°F 2 psid
R-407C +40°F bubble point +100°F dew point 2°F 2 psid
Remarks: Bi-ow versions are not released for use below -40°F.
EX6, EX7 and EX8 must be installed with motor downward in suction line applications.
This insures the valve life expectancy.
Multiply above nominal capacities by following factors to obtain capacities at different pressure drops:
∆P, psid
1.5 2.0 3.0 4.5
Correction factor
0.82 1.00 1.15 1.41
Example: EX6 provides 1 ton at 2.0 psid pressure drop with R-404A: 4 psi pressure drop.
R-22 Extended Capacities (Tons) - EX6-8 Series, suction pressure regulator duty
Valve Type
Condensing Temperature °F
Evaporating Temperature °F
50 40 30 20 10 0 -10 -20 -30 -40
EX6
140
1 1 1 1 1 1 1 0 0 0
EX7
4 3 3 3 2 2 2 2 1 1
EX8
11 10 9 8 7 6 5 5 4 3
EX6
130
1 1 1 1 1 1 1 0 0 0
EX7
4 3 3 3 3 2 2 2 1 1
EX8
12 11 10 8 8 7 6 5 4 4
EX6
120
1 1 1 1 1 1 1 0 0 0
EX7
4 4 3 3 3 2 2 2 1 1
EX8
12 11 10 9 8 7 6 5 4 4
EX6
110
1 1 1 1 1 1 1 1 0 0
EX7
4 4 3 3 3 2 2 2 2 1
EX8
13 12 11 9 8 7 6 6 5 4
EX6
100
1 1 1 1 1 1 1 1 0 0
EX7
4 4 4 3 3 3 2 2 2 1
EX8
14 12 11 10 9 8 7 6 5 4