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| | | irrel Heaters | | |
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| | | Special Mica Band Physical Limitations of Variations | | |
| | | Physical Limitations of Variations | | |
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| | | Diameter | | Width | | |
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| | | | | | | | | | | | | | | Heater Type | Min. | Max. | Min. | Max. | | | | | mm | (in.) | mm (in.) | mm | (in.) | mm (in.) | | | | 1 pc. | 33.3 | (15/6) | 559 (22) | 15.8 | (5/8) | 381 (15) | | | | 2 pc. | 76.2 | (3) | 1117 (44) | 15.8 | (5/8) | 381 (15) | | | | Expandable: | | | | | | | | | | Narrow | 44.4 | (13/4) | —— | 25.4 | (1) | 76.2 (3) | | | | Wide | 44.4 | (13/4) | — — | 50.8 | (2) | 152.4 (6) | | | | O.D. heater: | | | | | | | | | | 1 pc. | 76.2 | (3) | 559 (22) | 25.4 | (1) | 76.2 (6) | | | | 2 pc. | 76.2 | (3) | 1117 (44) | 25.4 | (1) | 76.2 (6) | | | | Type K leads | 19.05 | (3/4) | — — | 15.8 | (5/8) | 381 (15) | | | | Type L leads | 19.05 | (3/4) | —— | 19.05 | (5/8) | 381 (15) | | | | Type E leads | 38.1 | (112) | 559 (22) | 19.05 | (5/8) | 381 (15) | | | | Type F leads | 38.1 | (112) | 559 (22) | 19.05 | (5/8) | 381 (15) | | | | Type H leads | 38.1 | (112) | 559 (22) | 19.05 | f/8) | 381 (15) | | | | Type B leads | 38.1 | (112) | 559 (22) | 19.05 | (5/8) | 381 (15) | | | | Post terminal: | 33.3 | (1/6) | — — | 25.4 | (1) | 381 (15) | | | | Type A leads | 19 | (3/4) | — — | 19 | (3/4) | 381 (15) | | | | Type C leads | 33.3 | (1/6) | — — | 25.4 | (1) | 381 (15) | | | | Terminal box | 88.9 | (312) | —— | 34.9 | (13/8) | 381 (15) | | | | Plug w/bracket | 76.2 | (3) | —— | 88.9 | (312) | 381 (15) | | | | 3-phase | — | — | — — | 76.2 | (3) | 381 (15) | | | | European Plug: | | | | | | | | | | 1 pc. vertical | 33.3 | (1/6) | 559 (22) | 25.4 | (1) | 381 (15) | | | | 1 pc. horizontal | 76.2 | (3) | 559 (22) | 50.8 | (2) | 381 (15) | | | | 2 pc. vertical | 76.2 | (3) | 1117 (44) | 25.4 | (1) | 381 (15) | | | | 2 pc. horizontal | 76.2 | (3) | 1117 (44) | 50.8 | (2) | 381 (15) | | | | HV Wedge-Lok | 2.5.4 | (1) | 76.2 (3) | 25.4 | (1) | 76.2 (6) | | | | Clamping tabs | 50.8 | (2) | — — | 25.4 | (1) | 381 (15) | | | | Welded Barrel Nuts | | | | | | | | | | 1 pc. | 50.8 | (2) | 559 (22) | 25.4 | (1) | 381 (15) | | | | 2 pc. | 101.6 | (4) | 1117 (44) | 25.4 | (1) | 381 (15) | | | | | | | | | | | | | | |
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| | | Check the table to be certain the variations and lead arrangements being ordered are available on the heater size required. If you need to exceed any limitations please contact a Watlow representative. | | |
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| | | Note: Some combinations of maximum and minimums cannot occur on the same heater. Standard gap is 6.35 mm (0.25 in.) | | |
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| | | Variations | | |
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| | | Different Widths The 38 mm (1.5 In.) wide heater Is the most efficient due to maximum clamping action. Heaters are available in widths from 16 mm (0.625 in.) to 381 mm (15 in.). | | |
| | | Multiple clamping straps are provided for heaters more than 76 mm (3 in.) wide. | | |
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| | | Expandable Heaters Heaters 76 mm (3 in.) wide or less are constructed with a notched sheath. Heaters wider than three inches are constructed with an | | |
| | | expansion seam. These heaters are shipped open and should not be closed and reopened more than twice. To order, specify expandable. | | |
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