What is the role of the sealing ring in Dry Valve? How does it ensure the effective sealing of the valve?

The sealing ring plays a crucial role in maintaining efficient sealing of the valve when closed, making it a key component in preventing abnormal leakage of dry powder extinguishing agents and directly affecting the effectiveness and safety of fire extinguishers.
Firstly, in Dry Valve, the sealing ring is typically cleverly installed between the contact surfaces of the valve stem and the valve seat. The valve stem is the main moving part of the valve, while the valve seat is its stationary part. When the valve is closed, the valve stem tightly fits onto the valve seat, forming a closed space, where the sealing ring plays a vital role.
The primary function of the sealing ring is to fill and cushion the tiny gaps between the valve stem and the valve seat. These gaps may occur due to manufacturing precision, material wear, or temperature changes. Without the sealing ring, these gaps might lead to leakage of dry powder extinguishing agents when the valve is closed or prevent proper spraying when the valve is open. However, the presence of the sealing ring effectively prevents such occurrences.
To ensure the sealing ring maintains its sealing performance over time, manufacturers typically choose materials that are wear-resistant, corrosion-resistant, and have a certain degree of elasticity to make the sealing ring. These materials can withstand the friction and impact during the valve opening and closing process and deform slightly under pressure to better fill and seal tiny gaps.
Additionally, some high-end Dry Valve may employ more advanced sealing technologies, such as double or multiple sealing designs. This design installs multiple sealing rings at different parts of the valve, forming multiple lines of defense, greatly enhancing the sealing performance of the valve. Even if one sealing ring experiences wear or aging, the other sealing rings can still maintain a certain level of sealing effectiveness, thereby reducing the risk of leakage.
In addition to material and design considerations, correct installation and maintenance are also crucial factors in ensuring the sealing ring works effectively. During installation, it is essential to ensure the sealing ring is positioned correctly, undamaged, and tightly fits onto the contact surfaces of the valve stem and the valve seat. During maintenance, regular inspection of the sealing ring is necessary, and if wear or aging is detected, timely replacement should be conducted.
In summary, the sealing ring plays a critical sealing role in Dry Valve through its unique material characteristics and structural design. It ensures effective sealing of the valve when closed, thereby guaranteeing the normal use and performance of dry powder fire extinguishers. Therefore, when selecting and using Dry Valve, we should pay full attention to the role of the sealing ring and choose sealing ring products that are reliable in quality and stable in performance.