Fail-Safe Thermostats

The thermostat is designed according to a fail-safe operating principle to ensure maximum system protection under abnormal operating conditions. In the event of overheating, loss of actuation force, or thermo-element malfunction, the fail-safe mechanism drives the valve to a predefined safe position, allowing continuous coolant circulation. This prevents critical overheating of the engine or thermal system and ensures functional safety under fault conditions.

The thermostat housing is manufactured from PPS (Polyphenylene Sulfide), a high-temperature-resistant engineering material, instead of metal or aluminum alloys. The housing is produced using advanced joining technologies such as vibration welding and ultrasonic welding, providing high structural integrity, excellent thermal stability, and long-term resistance to thermal aging.

For the radiator connection, the product is equipped with a quick coupling interface that enables fast, secure, and error-free installation while supporting serviceability.

Unlike conventional plastic-housed thermostats commonly assembled by global manufacturers using mechanical fastening methods such as bolts and nuts, this design adopts a different assembly concept. The plastic housing components are directly joined using plastic welding techniques, eliminating the need for additional fastening hardware. This approach reduces part count, removes secondary materials, and improves overall robustness and leak-tightness.