How is the fire protection performance of the fire protection rising stem gate valve achieved?
Publish Time: 2024-12-26
The fire protection performance of the fire protection rising stem gate valve is achieved through a series of design and material selection to ensure that the valve can still work normally under extreme conditions such as fire, prevent the spread of fire and protect the pipeline system.1. Valve body and bonnet materialsHigh temperature resistant materials: The valve body and bonnet are usually made of high temperature resistant alloy steel or stainless steel materials, which can still maintain strength and structural stability at high temperatures.Fire resistant coating: In some designs, the surface of the valve body and bonnet may be coated with a fire resistant coating to improve its fire resistance.2. Sealing materialsHigh temperature resistant sealing ring: Use high temperature resistant sealing materials such as graphite, ceramic or special high temperature rubber to ensure that the sealing performance is not reduced in high temperature environment.Double seal design: With a double-channel sealing design, even if one seal fails, the other can still maintain sealing to prevent medium leakage.3. Packing and stuffing boxRefractory packing: The packing is made of refractory materials such as asbestos or refractory fiber to prevent the spread of fire through the stuffing box.Packing gland cooling system: In some designs, the packing box part may have a cooling water circulation system to reduce the packing temperature and extend its service life.4. Transmission mechanismFireproof transmission rod: The transmission rod is made of high temperature resistant material to ensure that the torque can be transmitted normally under fire conditions.Protective cover: The transmission mechanism may be equipped with a fireproof protective cover to protect the transmission parts from direct erosion by flames.5. ActuatorHigh temperature resistant actuator: If an electric or pneumatic actuator is used, choose a high temperature resistant model to ensure that the valve can be operated normally under fire conditions.Manual operation: For fire protection rising stem gate valve, a manual operation function is usually designed, which can manually operate the valve even when the power or gas source fails.6. Structural designFasteners: Use high temperature resistant fasteners, such as high temperature bolts and nuts, to ensure that they will not loosen or fail at high temperatures.Pressure relief device: In some designs, a pressure relief device may be included to prevent rupture caused by excessive internal pressure in the valve body.8. Coating and surface treatmentFire retardant coating: Apply fire retardant coating on the valve body and related parts to improve its fire resistance.Anti-corrosion treatment: Anti-corrosion treatment is performed to prevent chemical corrosion under fire conditions.The fire resistance of the fire protection rising stem gate valve is achieved by using high temperature resistant materials, fire resistant sealing materials, fire resistant fillers, protective covers and high temperature resistant actuators. In addition, strict testing and certification are carried out to ensure the reliability and safety of the valve under extreme conditions such as fire. These designs and material selections enable the fire protection rising stem gate valve to effectively control and block the flow of the medium when a fire occurs, prevent the spread of fire, and protect the safety of personnel and property.
