Watlow Electric Freeflex - Manual (Page 2)

Quote and Ordering Information
For a quote, please request, fill out and return a FREEFLEX
application data sheet.
To order, please specify:
Fluid Type
Inlet Temperature
Outlet Temperature
Flow Rate
Voltage - Typically less than 36 volts
Watts/ft - See chart below for typical values
Maximum Allowable Outside Surface Temperature
Tube Size
• 1 ⁄
32
in. (0.792 mm) I.D. x 1 ⁄
16
in. (1.59 mm) O.D.
• 1 ⁄
16
in. (1.59 mm) I.D. x 1 ⁄
8
in. (3.18 mm) O.D.
• 1 ⁄
8
in. (3.18 mm) I.D. x 3 ⁄
16
in. (4.76 mm) O.D.
• 3 ⁄
16
in. (4.76 mm) I.D. x 1 ⁄
4
in. (6.35 mm) O.D.
• Other (specify size)
Tube Material
• Teflon ® (standard)
• Silicone rubber
• Others upon request
Tube Length - 12 to 120 in. (305 to 3048 mm) typical
• Total
• Heated
• Unheated (specify)
Tube Fittings
• No fittings (1 in. (25 mm) bare tubing at each end)
• Other (specify)
Tube Flexing
• Static (to route around components in system)
• Dynamic (subject to more continuous flexing)
• Occasional, frequent or continuous
Note: Minimum recommended flexing radius
• 1 ⁄
32
in. (0.792 mm) I.D. x 1 ⁄
16
in. (1.59 mm) O.D. Teflon ® 1 in. (25 mm)
• 1 ⁄
16
in. (1.59 mm) I.D. x 1 ⁄
8
in. (3.18 mm) O.D. Teflon ® 1 1 ⁄
2
in. (38 mm)
• 1 ⁄
8
in. (3.18 mm) I.D. x 3 ⁄
16
in. (4.76 mm) O.D. Teflon ® 2 in. (51 mm)
• 3 ⁄
16
in. (4.76 mm) I.D. x 1 ⁄
4
in. (6.35 mm) O.D. Teflon ® 3 in. (76 mm)
Heater Leads
• One at each end
• Both at one end
• Standard lead insulation (UL
® Style 1180 white Teflon ® )
• Other insulation (specify)
Heater Lead Length
• Standard 12 in. (305 mm) w/customer end stripped/tinned
1 ⁄
2
in. (13 mm)
• Other (specify)
Heater Lead Exit Direction
• Inboard/outboard
Temperature Sensor
• Standard thermocouple (#30 AWG Teflon ® - Type J)
• Thermistor (specify) 10K
Ω at 25˚C (72˚F) standard
• Other temperature sensors size/types (specify)
• Sense heater element or tube temperature
Sensor Lead Exit Direction
• Inboard/outboard
Temperature Sensor Lead Length
• Standard 12 in. (305 mm)
• Other (specify)
W/ft W/m O.D. Temperature
° C (°F) (Ambient)
0 0 21 (70)
5 1.5 60 (140)
10 3.0 99 (210)
15 4.6 129 (265)
20 6.1 154 (310)
25 7.6 171 (340)
O.D. Temperature vs. Watts/Meter
O
.D
.
T
e
m
p
e
ra
tu
re
(˚
F
)
350
300
250
200
150
100
50
0
0 5 10 15 20 25 30
O.D. Temperature vs. Watts/Foot
177
149
121
93
66
38
10
1.5 3.0 4.6 6.1 7.6
O
.D
.
T
e
m
p
e
ra
tu
re
(˚
C
)
O.D. Temperature vs. Watts/Unit Length
Dry Tube - No Flow
Water Temperature Rise/Foot vs. Flow Rate vs. Watt Density ( 1 / 16
in. (1.59 mm) I.D. Tube)
Flow Rate of Water (mL/Minute)
W
a
te
r
T
e
m
p
e
ra
tu
re
R
is
e
(˚
F
/F
o
o
t)
90
80
70
60
50
40
30
20
10
0
10 20 30 40 50 60 70 80 90 100
164
146
128
109
91
73
55
36
18
0
W
a
te
r
T
e
m
p
e
ra
tu
re
R
is
e
(˚
C
/M
e
te
r)
50.0
37.5
25.0
12.5
W/ft
164
123
82
41
W/m
Water Temperature Rise °F/Foot
Flow Rate (mL/minute)
W/ft 10 30 50 100
50.0 82 29 19 10
37.5 64 22 14 7
25.0 41 16 10 5
12.5 22 8 5 3
Water Temperature Rise °C/Meter
Flow Rate (mL/minute)
W/m 10 30 50 100
164 149 52 35 18
123 116 40 26 13
82 75 29 18 9
41 40 15 9 5
Water Temperature Rise/Length Versus Flow Rate Versus Watt Density
FREEFLEX Outside Diameter Temperature Versus Watts/Length
To be automatically connected to the nearest North American Technical and Sales Office:
1-800-WATLOW2 • www.watlow.com • [email protected]
International Technical and Sales Offices: Australia, +61-3-9335-6449 • China, +86-21-3950-9510 • France, +33 (0) 3073-2425 •
Germany, +49 (0) 7253-9400-0 • Italy, +39 (0) 2 458-8841 • Japan, +81-3-3518-6630 • Korea, +82-2-575-9804 • Malaysia, +60-3-7980-7741 •
Mexico, +52 (442) 217-6235 • Shanghai, +86-21-3950-9504 • Singapore, +65-6777-1266 • Spain, +34 91 675 1292 • Sweden, +46 35-27-11-66 •
Taiwan, +886-7-288-5168 • United Kingdom, +44 (0) 115-964-0777