SRS Product Brochure - Evapco

®
S R S
S EAL- FREE R ECIRCULATOR S OLUTION
HORIZONTAL & VERTICAL
LIQUID RECIRCULATOR PACKAGES
PUMP
SEALS
S UPERIOR D ESIGN AND A DVANCED T ECHNOLOGY
FOR A MMONIA R EFRIGERATION S YSTEMS
International
Institute of
Ammonia Refrigeration

2
Since its founding in 1983, Refrigeration
Valves and Systems Corporation (RVS) has
become the customer preferred supplier of
innovative industrial refrigeration products
including factory assembled, packaged
recirculation systems and ASME pressure
vessels of all types and sizes.
RVS was acquired by EVAPCO, Inc. in 1994.
EVAPCO is recognized as the leading supplier
of quality heat transfer equipment to the
Industrial Refrigeration, HVAC, and Process
Cooling Industries. The success of
EVAPCO/RVS has been the result of a
continual commitment to product
improvement, quality workmanship, and a
dedication to providing unparalleled customer
service and satisfaction.
Pressure vessels and recirculator packages
are manufactured to ASME requirements in
two modern facilities located in Bryan, Texas
and Taneytown, Maryland. With 90,000
square feet of manufacturing area,
EVAPCO/RVS has the capacity to handle all of
your vessel and recirculator package
requirements.
From the smallest pressure vessel to the
largest packages, EVAPCO/RVS is committed
to providing superior technical support and
the highest quality products with fast, on-time
shipments to meet your construction
schedule.
© EVAPCO,INC. 2000
The SRS: Seal-Free Recirculator Solution
In today’s industrial refrigeration systems, a premium is placed on
operational reliability, value-added features, and reduced maintenance
requirements. As regulations governing refrigerant emissions increase,
end-users are focusing more resources on reducing the potential for
refrigerant leaks.
The SRS Recirculator Package is engineered to solve these challenges
with the ultimate in reliable, zero-leakage pump technology and troublefree
maintenance. The SRS Recirculator Package takes factory-assembled
recirculators to a higher level and reflects EVAPCO’s dedication to the
continual pursuit of improving product quality and dependability.
The SRS Advantage: EVAPCO extends an EXCLUSIVE 3-YEAR WARRANTY
on each SRS Recirculator Package. Additionally, EVAPCO carries a
complete inventory of pumps and parts to guarantee immediate availability
of components in the unlikely event of a problem.
All SRS Recirculator Packages are manufactured in accordance with ASME
BPV Code Sec. VIII Div. 1, ANSI/ASME B31.5, ASHRAE-15, IIAR-2, and
include the following features:
Advanced Refrigerant Pump Technology
• Featuring Buffalo ® refrigerant pumps, with over 40 years design and application
experience.
• Hermetically sealed, zero-leakage pump
eliminates refrigerant emissions.
• Absence of mechanical seals reduces
maintenance requirements and costs.
• No complicated protective electrical controls
required to safeguard warranty coverage.
• Very low NPSH requirements ensure reliable,
cavitation-free operation.
• Totally enclosed, liquid cooled motor with 316SS
construction on all wetted parts.
• Balanced, self-lubricating conical bearing design
provides service life up to 50,000 hours.
• Concentric axial wear pattern on bearings inhibits
radial movement of shaft and prevents rotor from
impacting stator.
• Patented variable flow orifice imparts balanced
axial thrust loads on bearings.
• Self-venting, vertical centerline discharge simplifies piping and pump-downs.
Finished Package Features
• Standard stainless steel condensate drain pan
for pumps reduces corrosion and improves
equipment room cleanliness and safety.
• Simplified refrigerant piping for easy access
for insulation and maintenance functions.
• Reduced height on horizontal units for lower
shipping costs and one-piece rigging operations.
• High quality surface preparation and primer application.
• Dried, nitrogen blanket charged, and sealed before shipment.

ASME Accumulator
• Designed and constructed for 150 psig, option for 250 psig.
• National Board registered.
• Increased shell length for maximum system surge volume.
• Dual relief valve assembly with 3-way selector valve
(shipped loose).
• Sized for low refrigerant velocity to prevent liquid
carryover to compressors.
• Internal recirculation and vent lines reduce insulation
cost and protect against shipping damage.
• Stainless steel nameplate bracket and standoff.
Liquid Level Control
• Electronic level control with 3 easily adjustable set points.
• High level float switch for positive compressor protection.
• Low level shut down to prevent pump cavitation.
• Five visual liquid level indicators with frost extensions.
• Option available for factory mounting of liquid feed assembly.
ASME Oil Pot with Relief
• Low side oil recovery without
system shutdown.
• One common drain point for all
low side oil recovery.
• Standard stainless steel
drain pan.
Additional Options:
NEMA-4, UL Listed Control Panel
• Main circuit breaker
disconnect.
• Integral control power
transformer.
• Integral starter contactors.
• Protection against pump
motor overheating.
• Factory mounting and
wiring available.
Factory Installed Insulation
• High quality Styrofoam ® insulation.
• ASJ vapor barrier.
• 0.030” thick PVC jacketing.
Galvanized Steel
Base Available
Custom Seismic
Designs Available
3

SRS Factory Assembled Advantages
SRS Liquid Recirculator Packages are completely
assembled by a factory-trained workforce dedicated to
building quality refrigeration products. All packages begin
with ASME code materials used for the vessel and its
internals. The packages are assembled in a controlled
factory environment with the industry’s highest quality
components. The finished package is designed for longlife,
to simplify installation, and to allow easy access for
performing routine maintenance functions.
The SRS reduces installation time and cost compared to the
field fabricated units–the complete package is rigged into
place. Extensive labor costs and coordination associated
with building a package on site are reduced due to minimal
refrigerant connections and welding requirements. Let
EVAPCO be your single-point source for recirculator design
and performance—EVAPCO personnel are dedicated to
quick response time, insuring that the finished product
leaves the factory according to your time requirements and
project specifications.
The benefits of zero-leakage hermetic pump technology are
widely acknowledged. With the introduction of the new
SRS Recirculator Package, EVAPCO becomes the only
recirculator manufacturer willing to back up a seal-free
refrigerant pump with an extended warranty to fully protect
your investment. The Buffalo ® pump is a reliable, stable
operating pump, requiring a simple control circuit for motor
cooling protection only. Complex controls that frequently
result in nuisance shutdowns and warranty disputes are not
required. And in the unlikely event of a pump failure,
EVAPCO maintains a stock of pumps and commits to ship
out a replacement within 24 hours.
SRS Recirculator Packages provide single point responsibility for recirculator
pump and package performance. The combination of superior workmanship and
quality materials, along with proven seal-free pump technology allows EVAPCO to
offer an EXCLUSIVE 3-YEAR WARRANTY on each SRS Recirculator Package.
This standard is unparralled in the refrigeration industry, and is the result of
EVAPCO’s confidence and willingness to stand behind our package design,
including the performance of the refrigerant pumps.
4

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.
5

Table 2a
CAPACITY AND WEIGHTS
MODEL SURGE VOLUME SHIPPING OPERATING
NO. CUBIC FT. WEIGHT LBS. WEIGHT LBS.
SRS-24V 17 2,800 4,450
SRS-30V 25 3,120 4,740
SRS-36V 35 3,530 5,310
SRS-42V 48 4,590 8,160
SRS-48V 70 5,960 10,490
SRS-54V 86 6,690 13,050
SRS-60V 110 7,070 14,530
SRS-72V 140 8,210 18,270
SRS-84V 190 9,980 25,580
SRS-96V 250 13,300 37,300
SRS-108V 320 16,680 45,220
SRS-120V 390 19,380 48,980
SRS-144V 510 32,300 90,300
Table 2b
CAPACITY AND WEIGHTS
MODEL SURGE VOLUME SHIPPING OPERATING
NO. CUBIC FT. WEIGHT LBS. WEIGHT LBS.
SRS-24H 10 2,960 4,010
SRS-30H 17 3,300 4,200
SRS-36H 28 3,690 5,090
SRS-42H 42 4,850 6,950
SRS-48H 61 6,110 8,910
SRS-54H 74 6,790 10,490
SRS-60H 86 7,200 11,800
SRS-72H 128 8,340 15,140
SRS-84H 180 10,280 23,080
SRS-96H 247 14,260 33,560
SRS-108H 336 17,070 43,570
SRS-120H 420 19,400 52,900
SRS-144H 650 36,900 87,900
Table 3
PUMP CAPACITY REQUIREMENTS NH 3 FLOW GPM PER TON
OVERFEED EVAPORATOR TEMPERATURE °F
RATE 30°F 20°F 10°F 0°F -10°F -20°F -30°F -40°F -50°F
3 : 1 .206 .201 .196 .191 .186 .182 .178 .174 .171
4 : 1 .275 .268 .261 .254 .249 .243 .238 .232 .228
6 : 1 .412 .401 .391 .382 .373 .364 .356 .349 .342
Table 4
PUMP SPECIFICATIONS
PUMP MODEL MAX. GPM PSID PUMP HP
E100M5 100 35 5
E125L5 125 30 5
E125H10 125 50 10
E250L10 250 30 10
*PSID based on .68 specific gravity. To correct pressure for other
ammonia specific gravities, multiply PSID by SG .
.68
6

VERTICAL RECIRCULATOR ASSEMBLY
G
RETURN FROM
EVAPORATORS
F
SUCTION TO
COMPRESSORS
F
SUCTION TO
COMPRESSORS
(FRONT 90°)
G
RETURN FROM
EVAPORATORS
(BACK 90°)
B
C
J
LIQUID
FEED
J
LIQUID
FEED
H
PUMPED LIQUID
TO EVAPORATORS
H
PUMPED LIQUID
TO EVAPORATORS
D
E
Diameter Length Total Ht. Base Width Base Length Dry Suct. Wet Suct. Pump Liq. Liq. Feed
MODEL NO. A B C D E F G H J
SRS-24V 24” 125” 193” 65” 69” 4” 5” 2” 1”
SRS-30V 30” 127” 196” 65” 71” 5” 5” 2” 1-1/4”
SRS-36V 36” 130” 198” 65” 72” 6” 6” 2” 1-1/4”
SRS-42V 42” 133” 201” 65” 74” 6” 6” 2-1/2” 1-1/4”
SRS-48V 48” 148” 216” 65” 75” 8” 8” 2-1/2” 1-1/2”
SRS-54V 54” 151” 219” 65” 76” 8” 10” 3” 2”
SRS-60V 60” 154” 222” 65” 78” 10” 10” 3” 2”
SRS-72V 72” 160” 228” 74” 81” 10” 12” 3” 2-1/2”
SRS-84V 84” 166” 234” 86” 89” 10” 12” 4” 2-1/2”
SRS-96V 96” 172” 240” 98” 98” 12” 12” 4” 3”
SRS-108V 108” 178” 246” 110” 107” 12” 14” 6” 4”
SRS-120V 120” 184” 252” 122” 116” 14” 16” 6” 4”
SRS-144V 144” 196” 264” 144” 134” 16” 18” 6” 4”
Care must be taken to assure that wet suction return line is free draining to the recirculator.
HORIZONTAL RECIRCULATOR ASSEMBLY
RETURN FROM
EVAPORATORS
F
B
SUCTION TO LIQUID
COMPRESSORS
E
FEED (BACK
SIDE)
H
F
RETURN FROM
EVAPORATORS
A
E
SUCTION TO
COMPRESSORS
C
G
PUMPED LIQUID
TO EVAPORATORS
PUMPED LIQUID
TO EVAPORATORS
G
SPLIT
PACKAGE
FOR
SHIPPING
D 9' 0"
Diameter Length Total Ht. Base Width Dry Suct. Wet Suct. Pump Liq. Liq. Feed
MODEL NO. A B C D E F G H
SRS-24H 24” 136-1/2” 102” 66” 4” 5” 2” 1”
SRS-30H 30” 139” 102” 66” 5” 5” 2” 1-1/4”
SRS-36H 36” 142” 102” 66” 6” 6” 2” 1-1/4”
SRS-42H 42” 145” 108” 66” 6” 6” 2-1/2” 1-1/4”
SRS-48H 48” 148” 112” 66” 8” 8” 2-1/2” 1-1/2”
SRS-54H 54” 151” 121” 66” 8” 10” 3” 1-1/2”
SRS-60H 60” 154” 126” 66” 10” 10” 3” 2”
SRS-72H 72” 160” 138” 76” 10” 12” 3” 2-1/2”
SRS-84H 84” 166” 150” 86” 10” 12” 4” 2-1/2”
SRS-96H 96” 172” 177” 86” 12” 12” 4” 3”
SRS-108H 108” 178” 189” 96” 12” 14” 6” 3”
SRS-120H 120” 184” 201” 106” 14” 16” 6” 4”
SRS-144H 144” 196” 225” 127” 16” 18” 6” 4”
Care must be taken to assure that wet suction return line is free draining to the recirculator.
7

EVAPCO–Your One Source
for Quality Refrigeration System Components
Evaporative Condensers
Custom
Recirculators &
Vessels
Induced Draft Models
Forced Draft Models
Cooling Towers & Closed Circuit Coolers
Induced Draft Models
Forced Draft Models
Evaporators
Horizontal & Vertical
Recirculators
Workroom Models Cooler and Freezer Models Custom Units
EVAPCO...Taking Quality and Service to a Higher Level.
World Headquarters
Research/Development Center
EVAPCO, Inc.
P.O. Box 1300
Westminster, MD 21158 USA
Ph: 410-756-2600
Fax: 410-756-6450
E-mail: evapco@evapco.com
Asia/Pacific Headquarters
EVAPCO ASIA, LTD.
Unit 1 G/F, Cloud Nine
9 Plunkett’s Road
The Peak, Hong Kong S.A.R.
P.R. China
Ph: (852) 2849-4100
Fax: (852) 2849-5233
E-mail: ktlonge@evapco.com
European Sales Offices
EVAPCO France S.A.R.L.
5 Rue des Cerisiers
Z.I. de I’Eglantier
F-91090 Lisses, France
Ph: (33) 1 6086-0506
Fax: (33) 1 6086-3990
EVAPCO Europe GmbH
Bovert 22
D-40670 Meerbusch, Germany
Ph: (49) 2159-912367
Fax: (49) 2159-912368
E-mail: sturles@evapco.de
EVAPCO Manufacturing Facilities
Refrigeration Valves & Systems
1520 Crosswind Dr.
Bryan, TX 77808 USA
Ph: 979-778-0095
Fax: 979-778-0030
E-mail: rvs@rvscorp.com
EVAPCO East
5151 Allendale Lane
Taneytown, MD 21787 USA
Ph: 410-756-2600
Fax: 410-756-6450
E-mail: evapco@evapco.com
EVAPCO Midwest
1723 York Road
Greenup, IL 62428 USA
Ph: 217-923-3431
Fax: 217-923-3300
E-mail: evapco@rr1.net
EVAPCO Iowa
Engineering & Sales Office
285 18th St., S.E.
Owatonna, MN 55060 USA
Ph: 507-446-8005
Fax: 507-446-8239
E-mail: evapcomn@evapcomn.com
Manufacturing Facility
925 Quality Drive
Lake View, IA 51450 USA
Ph: 712-657-3223
Fax: 712-657-3226
E-mail: evapcoia@netins.net
EVAPCO West
1900 West Almond Avenue
Madera, CA 93637 USA
Ph: 559-673-2207
Fax: 559-673-2378
E-mail: evapco@lightspeed.net
EVAPCO Europe, N.V.
Heersterveldweg 19
Industriezone, Tongeren-Oost
3700 Tongeren, Belgium
Ph: (32) 12-395029
Fax: (32) 12-238527
E-mail: evapco@pi.be
EVAPCO Europe, S.R.L.
Via Ciro Menotti 10,
I-20017 Passirana di Rho
Milano, Italy
Ph: (39) 02-939-9041
Fax: (39) 02-935-00840
E-mail: evapco@tin.it
EVAPCO Europe, S.R.L.
Via Dosso, 2
Piateda Sondrio, Italy 23020
Air EVAPCO (Ltd.)
92 Asma Fami Street, ARD El-Golf
Heliopolis, Cairo, Egypt
Ph: (202) 290-7483
Fax: (202) 290-0892
E-mail: manzlawi@egyponline.com
Beijing–EVAPCO Refrigeration
Equipment Co., Ltd.
Yan Qi Industrial Development District
Huai Rou County Beijing, P.R. China
Code 101407
Ph: (86) 10-6166-7238
Fax: (86) 10-6166-7395
E-mail: beijing@evapco.com
Shanghai Hezhong–EVAPCO
Refrigeration Co., Ltd.
855 Yang Tai Road
Bao Shan Area, Shanghai, P.R. China
Code 201901
Ph: (86) 21-5877-3980
Fax: (86) 21-5877-2928
E-mail: evapco@online.sh.cn
EVAPCO S.A. (Pty.) Ltd.
18 Quality Road
Isando 1600
Republic of South Africa
Ph: (27) 11-392-6630
Fax: (27) 11-392-6615
E-mail: evapco@icon.ca.za
Visit EVAPCO’s Website at:
http://www.evapco.com
Bulletin No. 505
7.5M/9799/DGD