Watlow Heater Catalog

Fluid Delivery Heaters

E xtended C apability

Extended Capabilities for FREEFLEX Heaters Technical Data

Water Temperature Rise/Length Versus Flow Rate Versus Watt Density

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/Foot vs. Flow Rate vs. Watt Density ( ⁄ in. (1.6 mm) I.D. Tube)

90 80 70 60 50 40 30 20 10 0

164 146 128 109

Water Temperature Rise

50.0 37.5 25.0 12.5 W/ft

164 123 W/m

(˚C/Meter)

91 73 55 36 18 0

82 41

Water Temperature Rise (˚F/Foot)

40

50

100

10

20

30

60

80

90

70

Flow Rate of Water (mL/Minute)

FREEFLEX Outside Diameter Temperature Versus Watts/Length

O.D. Temperature vs. Watts/Foot

7.6

W/ft W/m

O.D. Temperature ° F ( ° C) (Ambient)

3.0

6.1

4.6

1.5

177

350

0

0 5

70

(21) (60) (99)

300

149

1.5 3.0 4.6 6.1 7.6

140 210

10 15 20 25

265 (129) 310 (154) 340 (171)

250

121

O.D. Temperature (˚C)

93

200

66

150

O.D. Temperature vs. Watts/Unit Length Dry Tube - No Flow

O.D. Temperature (˚F)

38

100

10

50

0

5

0

10

15

20

25

30

O.D. Temperature vs. Watts/Meter

368