- Watlow Heating System Specification Sheet

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
T
ube Siz
e
•
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
• T
otal
• Heated
• Unheated (specify)
T
ube 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) 10KΩ 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. Temperature (˚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. Temperature (˚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)
Water Temperature Rise
(˚F/Foot)
9
0
80
70
60
5
0
4
0
3
0
20
10
0
10 20 30
40 50
60
70
80 90
100
164
146
128
109
91
73
55
36
18
0
Water Temperature Rise
(˚C/Meter)
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/min
ute)
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 • [e-mail]
International Technical and Sales Offices: Australia, [phone] • China, [phone] • France, [phone] •
Germany, [phone] • Italy, [phone] • Japan, [phone] • Korea, [phone] • Malaysia, [phone] •
Mexico, [phone] • Shanghai, [phone] • Singapore, [phone] • Spain, [phone] • Sweden, [phone] •
Taiwan, [phone] • United Kingdom, [phone]