SRS Product Brochure - Evapco

DESCRIPTION OF OPERATION
Liquid refrigerant is fed into the recirculator to maintain a
controlled liquid level. The liquid is mechanically pumped
to the evaporators at a rate exceeding the evaporation rate.
The liquid and vapor leaving the evaporators return to the
recirculator where they are separated. The liquid is
recirculated through the pump to the evaporators and the
dry suction gas passes to the compressors.
SYSTEM ADVANTAGES OF THE SRS RECIRCULATOR
• Excess feed rate optimizes evaporator performance by
completely wetting the internal tube surface and
maximizing heat transfer coefficients.
• Recirculator vessel protects compressor(s) from liquid
carryover and allows for hot gas defrosting into wet
suction lines.
• Excess feed rate and hot gas defrosting help to wash oil
from evaporators. Oil flows with the refrigerant to the
recirculator where it can be drained from one centralized
location.
• Pumps provide uniform flow of refrigerant to the plant
regardless of condensing pressure.
• Factory packaging reduces installation costs.
• Vertical recirculator saves floor space in the equipment
room.
SELECTION PROCEDURE
From TABLE 1, select a model with a capacity equal to or
greater than the required capacity at the given saturated
suction temperature.
In TABLE 2, check available surge volume for model
selected against required system surge volume. If
available surge volume is inadequate, select next larger
model with sufficient surge volume (or contact factory).
Determine required pump capacity from TABLE 3.
Select pump with sufficient capacity and head from
TABLE 4.
WHEN ORDERING PLEASE SPECIFY:
Recirculator model number and pump. Please include
required capacity in tons of refrigeration, saturated suction
temperature, recirculation rate, surge volume, liquid feed
temperature, and voltage/frequency. Also, please indicate
right hand or left hand pumped liquid connection.
Table 1a
VERTICAL RECIRCULATOR CAPACITY - NH 3 TONS OF REFRIGERATION
EVAPORATOR TEMPERATURE °F
MODEL SINGLE STAGE* TWO STAGE**
NO. 30°F 20°F 10°F 0°F -10°F -10°F -20°F -30°F -40°F -50°F
SRS-24V 150 140 120 110 95 110 95 80 65 50
SRS-30V 220 200 170 150 140 160 140 120 100 80
SRS-36V 310 280 250 220 200 220 200 175 150 120
SRS-42V 430 380 340 300 270 310 270 240 210 160
SRS48V 560 500 450 400 350 400 350 320 270 210
SRS-54V 740 660 600 520 470 540 470 420 360 280
SRS-60V 920 820 730 650 580 660 580 510 450 345
SRS-72V 1300 1200 1050 930 830 950 830 740 640 500
SRS-84V 1800 1600 1400 1300 1100 1300 1100 1000 860 670
SRS-96V 2400 2000 1900 1700 1400 1700 1500 1300 1100 880
SRS-108V 3100 2600 2500 2200 1800 2100 1800 1600 1400 1100
SRS-120V 3800 3200 3000 2700 2300 2600 2300 2000 1700 1400
SRS-144V 5900 5300 4700 4500 3500 4600 3500 3000 2400 2000
Table 1b
HORIZONTAL RECIRCULATOR CAPACITY - NH 3 TONS OF REFRIGERATION
EVAPORATOR TEMPERATURE °F
MODEL SINGLE STAGE* TWO STAGE**
NO. 30°F 20°F 10°F 0°F -10°F -10°F -20°F -30°F -40°F -50°F
SRS-24H 115 110 95 85 70 80 70 60 50 40
SRS-30H 195 175 160 135 120 130 120 100 80 65
SRS-36H 295 265 235 195 175 200 175 150 120 100
SRS-42H 410 370 310 280 250 280 250 210 170 140
SRS-48H 540 490 430 365 320 365 320 270 220 180
SRS-54H 790 710 630 530 470 530 470 395 325 265
SRS-60H 970 875 785 655 585 650 585 485 400 320
SRS-72H 1400 1270 1120 940 840 940 830 700 570 470
SRS-84H 1990 1800 1600 1350 1190 1340 1190 1000 810 675
SRS-96H 2620 2360 2110 1770 1570 1760 1570 1310 1080 885
SRS-108H 3330 2990 2680 2250 1990 2240 1990 1670 1370 1120
SRS-120H 4110 3700 3310 2780 2460 2760 2460 2060 1690 1390
SRS-144H 5920 5330 4770 4000 3550 4000 3550 2980 2450 2010
* Single stage assumes 96°F Max. liquid feed temperature. ** Two stage assumes 25°F Max. liquid feed temperature.
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