Watlow Heater Catalog

Reference Data

Tubular Elements and Assembly Selection Guide

Heat Transfer Oil Chart

Recommended

Min. Velocity Thru Heater

Flammability Data °F (°C)

in Feet/second at W/in 2 (M/second at W/cm 2 )

Max. Temperature °F (°C)

Process

Sheath

Flash Point

Fire Point

Autoignition

8

(1.2)

16

(2.8)

23

(3.6)

30

(4.7)

Heat Transfer

Fluid

F

(˚C)

˚F

(˚C)

˚F

(˚C)

˚F

(˚C)

˚F

(˚C)

W/in 2 (W/cm 2 ) W/in 2 (W/cm 2 ) W/in 2 (W/cm 2 ) W/in 2 (W/cm 2 )

Calflo HTF Calflo AF

600 (316) 650 (343) 550 (288) 600 (316)

414 (212) 400 (204) 255 (124) 305 (152) 145 (63) 260 (127)

462 (239) 437 (225)

670 (354) 1.5 (0.5) 650 (343) 1.5 (0.5)

3.0 (0.9) 3.0 (0.9) 1.0 (0.3) 1.5 (0.5) 2.0 (0.61) 1.5 (0.5) 2.5 (0.75) 1.5 (0.5) 3.0 (0.9) 3.0 (0.9) 1.7 (0.52) 2.0 (0.61) 1.5 (0.5) 3.0 (0.9) 2.5 (0.75) 4.0 (1.22) 3.0 (0.9) 2.0 (0.61) 2.5 (0.75) 2.5 (0.75) 3.0 (0.9) 2.5 (0.75) 2.0 (0.61) 2.5 (0.75) 2.0 (0.61) 2.0 (0.61)

5.0 (1.52) 7.0 (2.1) 5.0 (1.52) 7.0 (2.1) 2.0 (0.61) 3.0 (0.9)

Dowtherm ® A 750 (399) 835 (446)

275 (135) 1150 (621) 0.5 (0.15)

Dowtherm ® G 700 (371) 775 (413)

315 (157) 1150 (621) 0.7 (0.2)

2.5 (0.75) 3.5 (1.1)

Dowtherm ® J

575 (302) 650 (343)

155

(68)

806 (430) 1.0 (0.3)

3.0 (0.9)

4.5 (1.37)

Dowtherm ® LF 600 (316) 675 (357)

280 (138) 1020 (549) 0.7 (0.2)

2.5 (1.75) 3.5 (1.1)

Dowtherm ® HT 650 (343) 700 (371) no data no data no data no data no data no data 1.5 (0.5)

3.5 (1.1)

5.0 (1.52)

Dowtherm ® Q 625 (329) 700 (371) no data no data no data no data

773 (412) 0.7 (0.2)

2.5 (0.75) 3.5 (1.1)

Marlotherm S 662 (350) 698 (370) Mobiltherm 603 590 (310) 625 (329) Multitherm IG-2 600 (316) 650 (343) Multitherm PG-1 600 (316) 640 (338) Para Cymene 600 (316) 650 (343) Syltherm 800 750 (399) 800 (427) Syltherm XLT 500 (260) 550 (288)

374 (190) no data no data

932 (500) 1.5 (0.5)

5.0 (1.52) 7.0 (2.1) 5.0 (1.52) 7.0 (2.1)

380 (193) no data no data no data no data 1.5 (0.5)

440 (227) 340 (171) 117 (47) 350 (177) 116 (47) 455 (235) 405 (207) 350 (177) 302 (150) 310 (154) 350 (177) 390 (199) 134 (57) 255 (124) 540 (282)

500 (260) 385 (196)

700 (371) 0.8 (0.24) 690 (368) 1.0 (0.3) 817 (438) 0.7 (0.2) 725 (385) 1.5 (0.5) 662 (350) 1.5 (0.5)

2.3 (0.7) 3.0 (0.9)

3.0 (0.9) 4.0 (1.22)

152

(72)

2.5 (0.75) 3.5 (1.1) 5.0 (1.52) 7.0 (2.1) 4.0 (1.22) 5.0 (1.52) 6.0 (1.83) 8.0 (2.4)

380 (193)

130

(54)

Texatherm

600 (316) 640 (338)

430 (221) no data no data no data no data 2.0 (0.61)

Thermia 33 Therminol 44 Therminol 55 Therminol 59 Therminol 60 Therminol 68 Therminol 75 Therminol LT

600 (316) 650 (343) 400 (204) 475 (246) 550 (288) 605 (318) 600 (316) 650 (343) 620 (327) 655 (346) 650 (343) 705 (374) 750 (399) 805 (429) 600 (316) 650 (343)

495 (257) no data no data 1.5 (0.5)

5.0 (1.52) 7.0 (2.1)

438 (228) 410 (210) 335 (168) 320 (160)

705 (374) 1.0 (0.3) 675 (357) 1.5 (0.5) 770 (410) 1.5 (0.5) 835 (448) 1.5 (0.5)

3.0 (0.9) 3.5 (1.1) 3.5 (1.1)

4.0 (1.22) 5.0 (1.52) 5.0 (1.52)

5.0 (1.52) 7.0 (2.1)

380 (183)

705 (374) 1.5 (0.5)

3.0 (0.9) 3.0 (0.9)

4.5 (1.37) 4.0 (1.22)

440 (227) 1000 (538) 1.0 (0.3)

150

(66)

805 (429) 1.5 (0.5)

4.0 (1.22) 5.0 (1.52)

Therminol VP-1 750 (399) 800 (427)

280 (127) 1150 (621) 1.0 (0.3)

3.0 (0.9) 3.0 (0.9)

4.0 (1.22) 4.0 (1.22)

U-Con 500

500 (260) 550 (288)

600 (316)

750 (399) 1.0 (0.3)

550