Catalogs > Industrial Controls Catalog > Condition Sensing Switches and Controls > Temperature, Mechanical
Temperature, Mechanical
| Introduction |  |
Standards Compliance and Certifications | |
Introduction | |
Technical Data | |
Ordering Information | |
Catalog Number Explanation | |
| Product Selection | |
Modifications | |
Accessories | |
Renewal Parts | |
Factory Options | |
Approximate Dimensions | |
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| Style A — Type 1 with external manual reset option |
Style A — Type 7 & 9 and 4 & 13 combined |
Style A — Remote Bulb and Capillary¬ T
Standard temperature controls shipped from the factory are set at the maximum operating range and minimum differential.
| Temperature Specifications | Enclosure Type | ||||||||
| Adjustable Operating Range [°F] | Adjustable Differential [°F]T | Maximum Temperature [°F] | Bulb Length [in. (mm)] |
Open Type (Without Enclosure) | Type 1 | ||||
| Minimum Range | Mid Range | Maximum Range | Cat. No. | Cat. No. | |||||
| –60…+50 | 6…46 | 2…38 | 2…16 | 250 | 3-3/4 (95) | 837-A2 | 837-A2A | ||
| 25…125 | 4…36 | 2…30 | 2…16 | 160 | 8-1/2 (216) | ‡ | 837-A3 | ‡ | 837-A3A |
| 80…190 | 14…54 | 7…45 | 3…20 | 240 | 8-1/2 (216) | ‡ | 837-A4 | ‡ | 837-A4A |
| 130…200 | 5…28 | 5…26 | 3…18 | 240 | 3-3/4 (95) | 837-A5 | 837-A5A | ||
| 140…290 | 13…63 | 7…52 | 3…24 | 340 | 3-3/4 (95) | 837-A6 | 837-A6A | ||
| 200…360 | 8…72 | 4…62 | 3…30 | 400 | 3-3/4 (95) | 837-A7 | 837-A7A | ||
| 260…430 | 9…72 | 5…62 | 3…28 | 470 | 3-3/4 (95) | § | 837-A60 | § | 837-A60A |
| 310…490 | 10…78 | 5…67 | 3…21 | 520 | 3-3/4 (95) | § | 837-A61 | § | 837-A61A |
| 380…570 | 12…87 | 5…78 | 4…35 | 600 | 3-3/4 (95) | § | 837-A62 | § | 837-A62A |
| ¬ Minimum differentials shown are approximate values. Deviations are negligible for most applications. | |||||||||
| T The vapor pressure characteristics of the chemical fill in the bellows system do not respond linearly to temperature change from minimum to the maximum range setting of the control. The result is larger differential values at minimum temperature range setting and smaller values at the maximum temperature range setting. Differentials in the table are not constant over the adjustable range of the control. Therefore, the control should be selected on the basis of the adjustable operating range and the differential based upon the setting being at minimum, mid or maximum range. It may be necessary to move up or down in the table to select the most desirable control for the application. | |||||||||
| ‡ Cross-ambient controls are supplied with 8-1/2" long bulbs. Cross-ambient controls in the ranges of 25°…190°F require a larger volume of temperature-sensitive chemicals in the bulb than the additive volume contained in the capillary and bellows. For this reason, Bulb and Capillary type cross-ambient controls cannot be supplied with bulbs shorter than 8-1/2". | |||||||||
| § Supplied with stainless steel bulb and capillary to minimize oxides caused by elevated temperatures. | |||||||||
| § The combined Type 7 & 9 and 4 & 13 Hazardous Gas and Dust service enclosure is supplied with special gasket and O-ring seal to diminish/exclude moisture, fluids, and dust from entering the enclosure. Enclosures rated 7 & 9 only are not designed to restrict moisture from entering the enclosure, which is common to outdoor service. Enclosure is Rated for the Following Environments: CLASS I Groups C,D CLASS II Groups E,F,G CLASS III |
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Style A — Remote Bulb and Capillary¬ T
Standard temperature controls shipped from the factory are set at the maximum operating range and minimum differential.
| Temperature Specifications | Enclosure Type | ||||||||
| Adjustable Operating Range [°F] | Adjustable Differential [°F]T | Maximum Temperature [°F] | Bulb Length [in. (mm)] |
Type 4 & 13 | Type 7 & 9 and 4 & 13§ | ||||
| Minimum Range | Mid Range | Maximum Range | Cat. No. | Cat. No. | |||||
| –60…+50 | 6…46 | 2…38 | 2…16 | 250 | 3-3/4 (95) | 837-A2J | 837-A2E | ||
| 25…125 | 4…36 | 2…30 | 2…16 | 160 | 8-1/2 (216) | ‡ | 837-A3J | ‡ | 837-A3E |
| 80…190 | 14…54 | 7…45 | 3…20 | 240 | 8-1/2 (216) | ‡ | 837-A4J | ‡ | 837-A4E |
| 130…200 | 5…28 | 5…26 | 3…18 | 240 | 3-3/4 (95) | 837-A5J | 837-A5E | ||
| 140…290 | 13…63 | 7…52 | 3…24 | 340 | 3-3/4 (95) | 837-A6J | 837-A6E | ||
| 200…360 | 8…72 | 4…62 | 3…30 | 400 | 3-3/4 (95) | 837-A7J | 837-A7E | ||
| 260…430 | 9…72 | 5…62 | 3…28 | 470 | 3-3/4 (95) | § | 837-A60J | § | 837-A60E |
| 310…490 | 10…78 | 5…67 | 3…21 | 520 | 3-3/4 (95) | § | 837-A61J | § | 837-A61E |
| 380…570 | 12…87 | 5…78 | 4…35 | 600 | 3-3/4 (95) | § | 837-A62J | § | 837-A62E |
| Note:Bulb and capillary controls have a 72 in. long capillary which includes the length of the bulb. Bulbs are 3/8 in. in diameter. Material is copper unless otherwise specified. See Renewal Parts. Special longer length capillaries, generally over 30 feet, will be equipped with longer bulbs depending upon temperature range and chemical fill. Capillary diameter (outside diameter) is 0.125 in. |
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| ¬ Minimum differentials shown are approximate values. Deviations are negligible for most applications. | |||||||||
| T The vapor pressure characteristics of the chemical fill in the bellows system do not respond linearly to temperature change from minimum to the maximum range setting of the control. The result is larger differential values at minimum temperature range setting and smaller values at the maximum temperature range setting. Differentials in the table are not constant over the adjustable range of the control. Therefore, the control should be selected on the basis of the adjustable operating range and the differential based upon the setting being at minimum, mid or maximum range. It may be necessary to move up or down in the table to select the most desirable control for the application. | |||||||||
| ‡ Cross-ambient controls are supplied with 8.5 in. long bulbs. Cross-ambient controls in the ranges of 25…190 °F require a larger volume of temperature-sensitive chemicals in the bulb than the additive volume contained in the capillary and bellows. For this reason, bulb and capillary type cross-ambient controls cannot be supplied with bulbs shorter than 8.5 in.. | |||||||||
| § Supplied with stainless steel bulb and capillary to minimize oxides caused by elevated temperatures. | |||||||||
| § The combined Type 7 & 9 and 4 & 13 hazardous gas and dust service enclosure is supplied with special gasket and O-ring seal to diminish/exclude moisture, fluids, and dust from entering the enclosure. Enclosures rated 7 & 9 only are not designed to restrict moisture from entering the enclosure, which is common to outdoor service. Enclosure is rated for the following environments: CLASS I Groups C,D CLASS II Groups E,F,G CLASS III |
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| Style V — Type 4 & 13 Direct vertical immersion |
Style H — Type 1 Direct horizontal immersion shown with external manual reset |
Style H — Direct Horizontal Immersion¬ T
Standard temperature controls shipped from the factory are set at the maximum operating range and minimum differential.
| Temperature Specifications | Enclosure Type | |||||
| Adjustable Operating Range [°F] | Adjustable Differential [°F]T | Maximum Temperature [°F] | Open Type (Without Enclosure) | Type 1 | ||
| Minimum Range | Mid Range | Maximum Range | Cat. No. | Cat. No. | ||
| 25…125 | 4…36 | 2…30 | 2…16 | 160 | 837-H1 | 837-H1A |
| 110…200 | 8…41 | 6…34 | 3…18 | 240 | 837-H2 | 837-H2A |
| 140…290 | 13…63 | 7…52 | 3…24 | 340 | 837-H3 | 837-H3A |
| Note:Direct immersion controls are not available in Combined Type 7 & 9 and 4 & 13 Hazardous Duty enclosures. | ||||||
| ¬ Minimum differentials shown are approximate values. Deviations are negligible for most applications. | ||||||
| T The vapor pressure characteristics of the chemical fill in the bellows system do not respond linearly to temperature change from minimum to the maximum range setting of the control. The result is larger differential values at minimum temperature range setting and smaller values at the maximum temperature range setting. Differentials in the table are not constant over the adjustable range of the control. Therefore, the control should be selected on the basis of the adjustable operating range and the differential based upon the setting being at minimum, mid or maximum range. It may be necessary to move up or down in the table to select the most desirable control for the application. | ||||||
Style V — Direct Vertical Immersion¬ T
Standard temperature controls shipped from the factory are set at the maximum operating range and minimum differential.
| Temperature Specifications | Enclosure Type | ||||||
| Adjustable Operating Range [°F] | Adjustable Differential [°F]T | Maximum Temperature [°F] | Open Type (Without Enclosure) | Type 1 | Type 4 & 13 | ||
| Minimum Range | Mid Range | Maximum Range | Cat. No. | Cat. No. | Cat. No. | ||
| 25…125 | 4…36 | 2…30 | 2…16 | 160 | 837-V1 | 837-V1A | 837-V1J |
| 110…200 | 8…41 | 6…34 | 3…18 | 240 | 837-V2 | 837-V2A | 837-V2J |
| 140…290 | 13…63 | 7…52 | 3…24 | 340 | 837-V3 | 837-V3A | 837-V3J |
| Note:Direct immersion controls are not available in combined Type 7 & 9 and 4 & 13 Hazardous Duty enclosures. |
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| ¬ Minimum differentials shown are approximate values. Deviations are negligible for most applications. | |||||||
| T The vapor pressure characteristics of the chemical fill in the bellows system do not respond linearly to temperature change from minimum to the maximum range setting of the control. The result is larger differential values at minimum temperature range setting and smaller values at the maximum temperature range setting. Differentials in the table are not constant over the adjustable range of the control. Therefore, the control should be selected on the basis of the adjustable operating range and the differential based upon the setting being at minimum, mid or maximum range. It may be necessary to move up or down in the table to select the most desirable control for the application. | |||||||