Capillary Buld Mechanical Thermostat is a widely used home appliance part, like refrigerator, freezer, electric water heater, washer, electric oven, fried pan, ice machines, fish ponds, etc. Specification of Capillary Buld Mechanical Thermostat Working Principle of Capillary Buld Mechanical...
Capillary Buld Mechanical Thermostat is a widely used home appliance part, like refrigerator, freezer, electric water heater, washer, electric oven, fried pan, ice machines, fish ponds, etc.
Specification of Capillary Buld Mechanical Thermostat
Designed temperature range | -35°C ~ 320 °C |
Electrical properties | 16(3)A/30A-250V~10(1.8)A-400V~ |
Capillary length | 300mm to 3000mm |
Diameter of Sensing Bulb | 3mm,4mm,5mm,6mm |
Material of Terminal | Brass |
Material of Capillary and Sensing | Stainless Steel and Copper optional |
Working Principle of Capillary Buld Mechanical Thermostat
Capillary Buld Mechanical Thermostat is based on the principle of thermal expansion. The internal space of the thermostat consists of liquid (eg, Mercury) or natural gas. When the temperature of the bulb filled with natural gas increases, the gas undergoes an expansion. Thus, the gas expands along the path of the capillary tube and finally reaches the bellow (diaphragm). The expansion of the fluid causes an expansion of the diaphragm on both sides. So during an expansion, it presses the switch which changes the external circuit from closed to open stage.
Feature of Capillary Buld Mechanical Thermostat
Accurate temperature controlling
Wide control range
Great contact capacity
High reliabilities and thin thickness
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