Low temperature performance testing and surface temperature prediction method for electro-hydraulic valves

Electro-hydraulic valves are essential components in marine industrial applications, and their reliable performance under low temperature conditions is crucial, especially expand to colder environments and climate change brings more extreme weather changes. This paper conducts comprehensive low-temperature performance tests on marine electro-hydraulic remote control valve devices, including room temperature tests, low-temperature storage tests at −20, −40, −50, −60 °C, low-temperature performance tests at −10, −30, −40, −50 °C, internal and external icing tests, and de-icing verification tests. Based on the experimental data, a prediction method for valve surface temperature and low-temperature failure is proposed. The results indicate that low temperature can have an impact on the working performance of electro-hydraulic valves and cause failure of airtightness and switch function. The proposed data-driven prediction method has high accuracy and can meet practical engineering needs. This paper establishes effective low-temperature performance testing and prediction methods to ensure the winterization ability of polar ships in extreme low-temperature environments.