Fire Joint Sealing Ring
Fire Joint Sealing Ring serves as the “sealing barrier” for fire pipeline connections, directly determining the water pressure stability and safety during fire extinguishing. It is widely used in key components such as fire hydrants, fire hoses, and sprinkler systems.
The selection of materials must be adapted to the characteristics of fire-fighting scenarios: The mainstream Ethylene Propylene Diene Monomer (EPDM) has strong weather resistance and can resist ozone and ultraviolet rays even under operating conditions of -50℃ to 150℃, making it the first choice for fire hydrant and fire hose interfaces; Fluororubber (FKM) can withstand high temperatures up to 250℃ and is resistant to chemical corrosion, making it suitable for extreme environments such as chemical plants and oil refineries; Hydrogenated Nitrile Butadiene Rubber (HNBR) combines oil resistance and high-pressure resistance, and is mostly used for sealing high-pressure components such as fire pumps and valves.
In terms of structure, O-rings are the most common type, which achieve sealing through extrusion deformation and are used in conjunction with connection methods such as grooved connections and flange connections. Attention should be paid during installation: For grooved connections, the sealing ring must be fully embedded in the groove to avoid distortion; For flange connections, the “C”-shaped opening should face the inner diameter of the flange, and the bolts should be tightened symmetrically to the specified torque to prevent leakage.
Product Details
Daily maintenance should not be overlooked: The sealing rings should be stored in a dry environment at 0℃-35℃, with folding and squeezing avoided. Conduct visual inspections every quarter to check for cracks and hardening; carry out a water pressure test at 1.5 times the working pressure every year (maintain pressure for 5 minutes with no leakage). Any damaged sealing rings must be replaced promptly to ensure the sealing performance of the fire protection system at critical moments.
