Watlow Heater Catalog

Specialty Heaters

FLUENT In-line Heaters Technical Information

Standard Product Offering: Base Heaters

Number of Heating Circuits

Protection Tube Length in. (mm)

How to Specify a Standard Product: • Select a base heater from the chart to the left. • Choose the desired inlet and outlet fittings from page 446.

Watt Density (W/in 2 )

Outer Diameter in. (mm)

Volts Watts

240 120 240 120 240 120 240 120 240 120 240 240

500 250

1 1 1 1 1 1 1 2 2 2 2 1 1 2 2

1 1 1 1 1 1 1 1 1 1 1 1

(25) (25) (25) (25) (25) (25) (25) (25) (25) (25) (25) (25)

3.00 4.25 4.25 5.25 5.25 6.50 6.50 6.50 6.50 7.75 7.75 6.50 6.50

(76)

210

(108) (108) (133) (133) (165) (165) (165) (165) (197) (197) (165) (165) (254)

57

1000

228

375

62

1500

247

500

63

2000

250

750

94

3000 1000 4000

375 100 400

500

63

1 5 / 8 1 5 / 8 1 5 / 8

120/240 1000/4000 120/240 1500/6000 120/240 2000/8000

(41) (41) (41)

75/300 61/245 61/245

10.00 12.00

(304.8)

Note: Visit www.watlow.com/fluent for the latest list of standard designs and product information.

Pressure Drop - Air - With Internal Baffle @ 250°C

Pressure Drop - Air - With Baffle @ 250°C

4000

55

3500

50

45

3000

40

2500

35

30

2000

25

1500

20

Pressure Drop (PSI)

1000 Pressure-Drop (mbar)

15

10

500

5

0

0

0

25

50

75

100

125

150

175

200

225

250

275

Mass-Flow (I n /min)

Heater 4.25 in., Fitting 1 / 4 in.

Heater 4.25 in., Fitting 3 / 8 in.

Heater 6.5 in., Fitting 3 / 8 in.

Heater 6.5 in., Fitting 1 / 4 in.

Note: Internal baffle is required for all gas heating applications.

444