1. Color: black

2. Material: PE

3. Style: 75 / 110 / 160

4. Features: round shape

5. Principle:

        The principle of water sealing well is to use the difference in medium density or the difference in pressure inside and outside the isolation area to achieve the purpose of isolation. There are two main functions:

        ① Isolation and sealing to prevent the overflow of the isolation medium or the mixing of external media, so as to prevent environmental pollution or prevent fire and explosion

        ② It plays the role of safety protection, which is equivalent to a safety valve