How does the seal ring of Dry Valve prevent the leakage of fire extinguishing agent?

1. Basic function and structure of the seal ring
The basic function of the seal ring is to fill the gap between the valve body and the valve core to form an effective sealing surface, thereby preventing the fire extinguishing agent from leaking when the valve is closed. The design and material selection of the seal ring directly affect its sealing performance.

Sealing function: The seal ring prevents the fire extinguishing agent from leaking from the valve gap by closely contacting the valve body and the valve core. The seal ring needs to withstand the high pressure and wear of the dry powder while maintaining good elasticity and sealing performance.
Structural design: The seal ring is usually made of elastic materials (such as rubber or fluororubber) and has certain compressibility and recovery. Its shape design is usually annular and tightly embedded in the groove of the valve body to ensure that the gap can be effectively filled when the valve is closed.
2. Material selection and performance
The material selection of the seal ring has a vital impact on its sealing performance. Choosing the right material can improve the durability and sealing effect of the seal ring.

High temperature resistant materials: Dry valves may experience high temperature environments during use, so the sealing rings are usually made of high temperature resistant rubber materials, such as fluororubber (FKM) or silicone rubber. These materials can maintain good elasticity and sealing performance at high temperatures.
Corrosion resistant materials: Due to the chemical properties of dry valves, the sealing rings must also have corrosion resistance. Selecting corrosion resistant materials can prevent the fire extinguishing agent from corroding the sealing rings, thereby increasing their service life.
3. Details of sealing design
The design details of the sealing ring determine its sealing effect in actual application. Reasonable design can effectively improve the sealing performance and prevent the leakage of fire extinguishing agent.

Size matching: The size of the sealing ring must be precisely matched with the size of the valve body and valve core. An oversized sealing ring may cause the valve to not be completely closed, while an undersized sealing ring may not be able to fill the gap. Accurate size matching ensures that the sealing ring fits tightly when the valve is closed, thereby preventing leakage.
Sealing surface design: The sealing surface design of the sealing ring should take into account the contact surface shape of the valve body and valve core. Common designs include flat sealing, concave and convex surface sealing, etc. Appropriate sealing surface design can improve the sealing effect of the sealing ring and reduce the risk of leakage.
4. Installation and maintenance of the sealing ring
The installation and maintenance of the sealing ring directly affect its sealing performance. Correct installation and regular maintenance can ensure the normal operation of the sealing ring and prevent leakage problems.

Correct installation: When installing the sealing ring, it is necessary to ensure that it is correctly placed in the groove of the valve body. Avoid damaging the sealing ring during installation and ensure that it is evenly compressed. Improper installation may cause the sealing ring to fail, which in turn causes the fire extinguishing agent to leak.
Regular inspection: Regularly checking the status of the sealing ring is an important part of maintaining the fire extinguisher. The inspection content includes the wear and aging of the sealing ring and whether there are cracks. If problems are found, the sealing ring should be replaced in time to ensure the normal use of the fire extinguisher.
5. Advantages of high-quality sealing rings
The use of high-quality sealing rings can significantly improve the sealing performance of the Dry Valve, thereby improving the overall safety and reliability of the fire extinguisher.

Reduce the risk of leakage: High-quality sealing rings have better elasticity and sealing effect, which can effectively prevent the leakage of fire extinguishing agent and ensure the reliability of the fire extinguisher in emergency situations.
Extended service life: High-quality sealing rings can withstand long-term use and high-pressure environments, extending the service life of the Dry Valve and fire extinguisher and reducing maintenance costs.