Techtrixinfo - Types of thermostat: 1. Wax type 2. Bellows type Waxtype: The internal combustion engine cooling thermostat maintains the temperature of the engine near its optimum operating temperature by regulating the
Bellows Sensing Capillary Thermostat for Gas Valve/ Industrical Appliance - China Electric Heater, Water Heater | Made-in-China.com