1. ZXF type vacuum relief valve is a negative pressure ventilation device installed on the storage tank, which can be used in conjunction with a breathing valve to increase the air intake of the storage tank to prevent tank collapse, or can be used separately.  
2. The ZXF type vacuum relief valve has the characteristics of large ventilation, small leakage, corrosion resistance, etc. It also has an electrostatic grounding wire to maintain equipotential between the valve and the tank body.  
3. The ZXF vacuum relief valve has anti freezing performance and is also suitable for cold regions.  
4. Operating pressure -392.3Pa-40mmHg or as per user requirements.

Performance parameters of ZXF vacuum relief valve: