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BITZER 2nd generation 2-stage

Bitzer 2nd generation 2-stage S4G-12.2Y

2nd generation 2-stage S4G-12.2Y

BITZER is raising the bar in terms of technology and capacity for expanded low temperature applications with the 2nd generation of 2-stage compressors. This series is the result of extensive research on the basis of years of experience in the construction of highly efficient and solid reciprocating compressors. The gas flow control and working valves are specially adapted for low temperature applications.

  • Displacement at 1450 min-1 : 42,3 (LP) 27,0 (HP)
  • Number of cylinders : 4
  • Oilcharge : 4,5 dm3

With liquid subcooling 50Hz (R404A/R507A)

Compressor type Cond.temp. Qo / Pe Evaporating temperature °C
[°C] -25 -30 -35 -40 -45 -50 -55 -60 -65 -70
S4G-12.2Y 30 Qo 19490 16830 14280 11860 9650 7680 5980 4570 3410 2490
Pe 9,74 9,06 8,35 7,61 6,85 6,10 5,35 4,62 3,92 3,27
35 Qo 19260 16570 14000 11600 9430 7510 5870 4480 3340 2420
Pe 10,39 9,64 8,86 8,05 7,22 6,40 5,59 4,81 4,06 3,37
40 Qo 18920 16230 13690 11340 9220 7360 5760 4400 3250
Pe 11,05 10,23 9,37 8,49 7,60 6,72 5,85 5,01 4,22
45 Qo 18520 15860 13370 11080 9030 7230 5660 4290
Pe 11,70 10,82 9,90 8,96 8,00 7,05 6,12 5,22
50 Qo 18070 15480 13060 10850 8860 7100 5540
Pe 12,32 11,40 10,44 9,44 8,42 7,41 6,41
55 Qo 17610 15100 12770 10640 8710 6970
Pe 12,90 11,98 10,99 9,94 8,87 7,78

Qo - Cooling capacity [Watt], Pe - Power consumption [kW]

Without liquid subcooling 50Hz (R404A/R507A)

Compressor type Cond.temp. Qo / Pe Evaporating temperature °C
[°C] -25 -30 -35 -40 -45 -50 -55 -60 -65 -70
S4G-12.2Y 30 Qo 15860 13270 10910 8800 6960 5390 4090 3050 2220 1590
Pe 9,02 8,28 7,55 6,83 6,11 5,40 4,69 3,98 3,27 2,57
35 Qo 15060 12540 10270 8260 6520 5050 3840 2860 2090 1480
Pe 9,45 8,66 7,88 7,11 6,34 5,57 4,82 4,07 3,32 2,59
40 Qo 14160 11760 9610 7710 6090 4720 3570 2680 1930
Pe 9,87 9,04 8,21 7,38 6,56 5,75 4,95 4,15 3,37
45 Qo 13200 10940 8920 7170 5660 4400 3350 2470
Pe 10,29 9,42 8,54 7,67 6,80 5,94 5,08 4,25
50 Qo 12180 10080 8230 6620 5240 4070 3080
Pe 10,72 9,81 8,89 7,97 7,05 6,14 5,24
55 Qo 11100 9200 7520 6060 4800 3720
Pe 11,15 10,21 9,25 8,30 7,34 6,38

Qo - Cooling capacity [Watt], Pe - Power consumption [kW]

Compressor type Displacement at 1450 min-1 Number of cylinders Oil charge Weight Pipe connections Motor Max. operating current Max. power consumption Starting current(lockedrotor)
LP HP DL SL
dm3 Kg mm pouce mm pouce Amp kW Amp. Y/YY
S4G-12.2Y 42,3 27,0 4 4,5 180 28 11/8 35 13/8 380 ..420YY/3/50
440 ..480 YY/3/60		 24 13,8 69/113