Technical Specifications Basic Identification Brand: Alstom Part No.: STC ZJ0418001 Series: STC Railway Sealing Gasket Series Product Type: Flange Sealing Joint / Elastomer Gasket Application: Train traction cooling loop, compressed air pipeline, electrical cabinet enclosure, auxiliary equipment flange seal Material Performance Parameters Base Material: Nitrile butadiene rubber (NBR) reinforced with aramid fiber filler Hardness: Shore A 70 ±5 Operating Temperature Range: -40 ℃ ~ +120 ℃ Short-Time Peak Temperature Resistance: Up to 140 ℃ Medium Compatibility: Anti-lubricating oil, coolant, compressed air, weak acid/alkaline mist Compression Set: ≤25% (72h, 100℃ test) Tensile Strength: ≥12 MPa Elongation at Break: ≥300% Fire Standard: EN 45545-2 HL3 low smoke, low toxicity, flame retardant grade Dimensional & Structural Specs Structure: Flat integral sealing gasket with positioning holes Standard Thickness: 2.0 mm Overall Outer Dimension: Custom fixed size matched to Alstom standard flange Mounting: Bolt fastening flange assembly, built-in positioning holes for anti-offset Surface Treatment: Smooth anti-adhesion coating, prevent sticking to metal flange Sealing & Mechanical Properties Max Working Sealing Pressure: 1.0 MPa Minimum Sealing Compression Rate: 20%~35% Vibration Resistance: IEC 61373 railway rolling stock vibration standard, no cracking or leakage after long-time vibration test Shock Resistance: 15g impact load, sealing performance remains intact Service Life: ≥8 years under normal vehicle operating condition Environmental & Compliance Storage Temperature: -45 ℃ ~ +70 ℃ Humidity Resistance: 5%~98% non-condensing, anti-mold