Brochure

Emerson Climate Technologies
216
Mechanical Pressure Regulators
251
Crankcase Pressure Regulator Series PRC
Capacity Table
*Nominal capacities are based on evaporating tempera ture +4°C and condensing temperature +38°C and a pressure drop of 1 K.
Selection for operating conditions other than +38°C / +4°C and 1 K liquid
subcooling at the inlet of the valve: (capacities are based on a pressure
drop of 0.07 bar).
Selection
Type Part No.
Tube Connection
ODF
Nominal Capacity* Q
n
(kW)
R134a R404A / R507 R407C R22
PRC - 11A 800 384 16 mm -
5
/
8
”
3.0 4.5 4.5 4.8
PRC - 11B 800 385 22 mm -
7
/
8
”
PRC - 21C 800 386 28 mm
7.4 11.1 11.1 11.9
PRC - 21D 800 387 1 -
1
/
8
”
PRC - 21C 800 388 35 mm - 1-
3
/
8
”
Refrigerant
Evaporating
Temperature
°C
Capacity (kW) Valve setting °C
Valve Size 1: PRC-11x Valve Size 2: PRC-21x
-20 -15 -10 -5 0 +5 [phone] +5 +10
R22
-29 2.3 3.4 4.4 4.8 4.9 5.8 8.8 10.0 10.0 10.0
-21 2.4 4.1 5.4 5.8 6.5 12.1 12.1 12.1
-14 2.7 4.9 6.2 8.1 13.8 13.8
-8 3.5 5.3 9.0 15.4
-3 3.1 9.9
R407 C
-6 3.1 4.8 7.9 13.9
-1 2.9 9.2
R134 a
-6 2.1 3.9 5.3 5.2 10.3 12.9
1 2.4 4.7 6.1 12.2
7 3.3 8.1
R404A /
R507
-27 1.6 2.9 3.7 3.9 4.8 8.2 8.2 8.2
-20 1.9 3.5 4.5 5.7 9.8 9.8
-14 2.2 4.5 6.8 11.6
-10 3.1 8.1
Crankcase Pressure Regulator Series PRC
M36