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Temperature, Mechanical
Temperature, Mechanical
Bulletin 837 Temperature Controls
- Operating ranges from -60…+570 °F
- Adjustable range and differential
- Remote bulb sensing or direct immersion types
- Stainless steel bulb, capillary, and armor available
- Variety of contact blocks available
- Open Type, Type 1, Type 4 & 13, Type 4X, and Type 7 & 9 and 4 & 13 combination enclosures
Bulletin 837 Bulb and Capillary Type without Enclosure
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Description
Bulletin 837 Temperature Controls are heavy-duty control circuit devices used in industrial applications where the temperature must be maintained within preset limits. These devices use a vapor pressure technology to sense changes in temperature. The pressure change is transmitted to the bellows through a bulb and capillary tube. Pressure in the system changes in proportion to the temperature of the bulb. Vapor pressure technology provides excellent repeat accuracy and exceptionally long life. Bulletin 837 Temperature Controls are designed for long life and heavy duty operation. Standard controls have precision snap-action silver contacts, and are offered in three different styles. All styles make use of bulbs and capillaries filled with a temperature-responsive liquid for detecting temperature changes. The controls are available in a wide variety of enclosures. There are many options and modifications available to meet most application requirements.
Applications
- Ovens
- Refrigeration units
- Machine coolants
- Bearing temperature
- Die temperature
- Water freeze protection
Style A — Remote Bulb and Capillary
Copper alloy bulb and capillary
- Adjustable operating range from –60…+360 °F
- Bulb may be located up to 6 feet from the control (standard)
- Adjustable range and differential
- Enclosure types: Open Type, Type 1, 4 & 13, and combined 7 & 9 and 4 & 13
- Maximum temperature up to 400 °F
Stainless steel bulb and capillary
- Adjustable operating range from 260…570 °F
- Bulb and capillary resist oxide due to high temperature
- Bulb may be located up to 6 feet from the control (standard)
- Adjustable range and differential
- Enclosure types: Open Type, Type 1, 4 & 13, 4X, and combined 7 & 9 and 4 & 13
- Maximum temperature up to 600 °F
Style H — Direct Horizontal Immersion
Brass bulb
- Adjustable operating range from 25…290 °F
- Direct horizontal mount on equipment
- Enclosure types: Open Type, and Type 1
- Maximum temperature up to 340 °F
- Maximum pressure is 300 psi without thermostat well
Style V — Direct Vertical Immersion
Brass bulb
- Adjustable operating range from 25…290 °F
- Direct vertical mount on equipment
- Enclosure types: Open Type, Type 1 and 4 & 13
- Maximum temperature up to 340 °F
- Maximum pressure is 300 psi without thermostat well
