How about the self-closing valve of Chongqing Panheng Valve Co., Ltd.?

All right. Pipeline gas self-closing valve (hereinafter referred to as self-closing valve) is a new generation of gas safety protection products with high technology content, no energy consumption, no pollution and no maintenance.

1, no electricity and other energy sources, energy saving and environmental protection.

. 2, automatic detection, sensitive and reliable, free from environmental interference.

3, the service life is long, and there is no need for regular inspection during use.

4, simple operation, no maintenance.

5, automatic shutdown, manual opening, always closed before troubleshooting, to ensure safety and reliability.