If it is necessary to clean and remove some dirt on the parts, you can directly prepare the corresponding cleaning liquid, and then dismantle the corresponding parts and put them into the liquid for immersion cleaning. Do not use hard tools to scrub and ensure the state of the parts themselves. 　　

The special valve for liquefied gas must be able to "identify" steam and condensed water, so that it can act as a butterfly valve to block steam and drain water. The "identification" of steam and condensed water is based on three principles: density difference, temperature difference and phase change. Therefore, three types of special valves for liquefied gas are manufactured according to the three principles, which are classified as mechanical type, thermal static type and thermal dynamic type.