Refrigeration temperature control

High-demand chiller applications, such as refrigeration units, often face frost buildup. Overworking these systems leads to ice formation, reducing efficiency and increasing maintenance needs. Many units use advanced chiller thermostats, specifically capillary thermostats, to ensure precise refrigeration control and prevent frost.

How a Capillary Thermostat Enhances Refrigeration Control

Stemco capillary thermostats maintain precise temperature control within chiller systems. These thermostats use an external sensor bulb to monitor temperature. When the temperature drops to a set threshold, the thermostat contacts open, shutting down the compressor and preventing further cooling. This action stops frost formation. Once the temperature stabilizes and the frost dissipates, the thermostat contacts close, reactivating the compressor. For more information on our line of thermostats, visit the product page.

Integration of Secondary Chiller Thermostats

Some chiller setups use a secondary thermostat, typically another capillary thermostat, for enhanced efficiency and protection. This secondary thermostat prevents the chiller or compressor from operating under specific conditions. For instance, an air conditioning system may use a secondary thermostat to stop compressor activity when the outdoor temperature falls below 50°F, protecting the equipment from damage and inefficiency.

Stemco 351-254485 Capillary ThermostatAdvantages of a Stemco Capillary Thermostat in Refrigeration Control

Stemco capillary thermostats offer several technical advantages. Our thermostats include ambient temperature compensation, ensuring accurate readings and reliable performance in various environmental conditions. Key benefits include:

  • Versatility: Suitable for a wide range of high-limit applications.
  • High Current Capacity: Manages up to 25 amps.
  • Extensive Temperature Range: Operates between 0°F and 700°F.
  • Robust Ambient Temperature Tolerance: Withstands conditions up to 250°F.

Ourcapillary thermostats provide reliable frost prevention, maintain system performance, and enhance the longevity of chiller systems in refrigeration and air conditioning applications.

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Bulb & Capillary Thermostats

Original equipment manufacturers worldwide use thermostat switches designed and manufactured by STEMCO, a Division of Senasys. No matter which style or model you choose, all of the capillary thermostat switches operate using the same physics. A fluid is encapsulated in a metal and when the temperature changes the fluid either expands or contracts. This fluid change moves a diaphragm which is in touch with a snap action switch and either opens or closes a circuit.

Ambient Compensation

Our capillary thermostats can be ambient compensated to offset the differential in temperature which keeps our thermostat controls more accurate as it’s environment changes.

Custom Options

Capillary thermostat switches built by Senasys can also be built to customer specifications. This insures you get the exact control you want without paying for features you don’t need.