1. 100% rubber or silicone structure can meet various high temperature resistance requirements (according to actual needs, you can choose different materials).

2. Environmental protection of materials.

3. No clogging, good sealing, effectively prevent liquid and gas from returning.

4. Long service life and no trouble.

5. The opening pressure is small. Generally, liquid or gas with 1-5KPA pressure can be opened.

6. Convenient installation.