catalog 717.qxd

Page 8
CATALOG
Refrigerant Distributors
Direct Expansion – Steel & Aluminum
Models – Flange Connections
Sporlan refrigerant distributors for R-717 function like
our conventional brass models.
Steel models – The distributor body is Type 8620 vacuum
degassed steel. The nozzle is Type 303 stainless steel,
and the dispersion cone in the distributor is made of
Stellite.
Distributor tube connections are available for 3/16", 1/4",
and 5/16" OD steel tubing. The ODF connections are
trepanned to facilitate welding the joint. A 1/8" NPT connection
is also available with Types 1130, 1133, and 1138
distributors.
Aluminum models – These distributors are designed for
R-717 aluminum coils, and they are 6061-T6 aluminum.
As with the steel distributors, the dispersion cone is
Stellite, and the nozzle is stainless steel.
Distributor tube connections are available for 3/16", 1/4",
and 5/16" OD aluminum tubing. Aluminum brazing techniques
require more space between circuits than copper
to brass brazing. As a result, the maximum number of
circuits is less than for comparable brass models.
Applying Distributors to Thermostatic
Expansion Valves
All Type D and Type A TEVs up to and including 50 tons,
employ a discharge tube. The discharge tube reduces
refrigerant velocity across the valve port, preventing premature
pin and seat erosion. When a distributor is used
with these valves, the distributor nozzle performs the discharge
tube’s function. The discharge tube must then be
removed from the valve to avoid excessive pressure drop.
Distributor performance is best obtained if the distributor
is bolted directly to the TEV outlet. When it is not
possible to bolt the TEV to the distributor, or if a shut off
valve is installed between them, use a short, straight
piece of pipe to connect the two. The pipe should not
exceed two feet. It should be sized to maintain high
refrigerant velocities. Elbows between the TEV and distributor
are not recommended since they hinder proper
distribution.
Ratings for Refrigerant 717 Distributors
Full load ratings are based on 30 psi nozzle, 10 psi tube pressure
drop and 86° liquid temperature entering thermostatic
expansion valve.
Distributor Tube Circuit Capacities
Tons of Refrigeration – Tube Length 30”
REFRIGERANT
DISTRIBUTOR
717 Ammonia
T UBE
OD
– Inches
EVAPORATOR
TEMPERATURE ° F
40°
20°
5 ° - 10°
- 20°
-30°
3/16
1.79
1.27
1.01
0.82
0.72
0.64
1/4
4.52
3.20
2.55
2.07
1.82
1.62
5/16
9.73
6.90
5.50
4.46
3.93
3.49
1/8"
Pipe* 12.
0 8.50
6.77
5.50
4.84
4.30
* Schedule 40
LIQUID TEMPERATURE ENTERING TEV ° F
REFRIGERANT 35°
45°
55°
65°
75°
86°
95°
CORRECTION FACTOR, CF LIQUID TEMPERATURE
717
2.95
2.15
1.58
1.33
1.17
1.00
0.85
Distributor Nozzle Orifice Capacities for Ammonia
at Various Evaporator Temperatures
Tons of Refrigeration
To use the table below, knowing total load in tons and evaporator
temperature, find nearest capacity in the table. On same horizontal
line in extreme left column is the Distributor Nozzle Orifice
Number to order. For example: 5.3 ton load at minus 10°F would
require Nozzle Orifice Number 12A.
REFRIGERANT
DISTRIBUTOR
717 Ammonia
NOZZLE
NUMBER
EVAPORATOR TEMPERATURE ° F
40°
20°
5 ° - 10°
- 20°
-30°
1A
0.65
0.48
0.41
0.35
0.32
0.30
1-1/2A
1.07
0.79
0.66
0.58
0.53
0.50
2A
1.42
1.05
0.88
0.76
0.70
0.65
2-1/2A
2.03
1.50
1.26
1.09
1.00
0.94
3A
2.62
1.93
1.62
1.40
1.30
1.21
4A
3.01
2.22
1.86
1.61
1.49
1.39
5A
4.07
3.01
2.52
2.19
2.02
1.88
6A
4.95
3.66
3.07
2.66
2.45
2.29
8A
6.83
5.05
4.23
3.67
3.38
3.15
10A
8.10
5.98
5.02
4.35
4.01
3.74
12A
9.64
7.12
5.98
5.17
4.77
4.45
15A
13.
1 9.69
8.13
7.04
6.50
6.06
18A
16.
3 12.
1 10.
1 8.77
8.09
7.55
20A
17.
4 12.
8 10.
8 9.31
8.59
8.01
25A
22.
2 16.
4 13.
7 11.
9 11.
0 10. 2
30A
29.
2 21.
6 18.
1 15.
7 14.
5 13. 5
35A
34.
8 25.
7 21.
6 18.
7 17.
2 16. 1
40A
39.
2 29.
0 24.
3 21.
0 19.
4 18. 1
50A
49.
5 36.
6 30.
7 26.
6 24.
5 22. 9
Ratings based on 86°F liquid entering TEV, 30 psi ∆P across nozzle,
10 psi ∆P across distributor tubes, 30” tube length.
For information on applications and capacities at evaporator temperatures
below -30°F consult Sporlan Valve Company.
NOTE: For direct expansion application with liquid temperatures
lower than tabulated values or for flooded liquid recirculation systems
– contact Sporlan Valve Company, Washington, MO 63090.