O-Ring G Type Size List

O-Rings are essential components for fluid sealing, and the G Series, as defined in the Japanese JIS B 2401 standard, is engineered specifically for heavy-duty static sealing applications. G-type O-Rings feature larger cross sections (CS) for high-pressure sealing, often used in fixed, non-moving parts.

🔧 What Is the JIS G Series O-Ring?

  • "G" stands for static, heavy-duty use under high pressure

  • Defined under JIS B 2401 (Japan Industrial Standards)

  • Utilizes metric dimensions (mm)

  • Designed for flange joints, valve bodies, and heavy equipment

  • Cross sections range from 3.5 mm to 5.7 mm

🧰 Common Applications

  • Static seals in hydraulic equipment

  • Flange connectors and cylinder covers

  • Heavy machinery and pressure vessels

  • Oil & gas, energy, and petrochemical industries

📐 How to Select the Right G Type O-Ring?

  1. Check the groove dimensions and equipment specs

  2. Choose the proper CS (thickness) based on pressure

  3. Select suitable rubber materials (NBR, FKM, EPDM, Silicone)

  4. Follow JIS B 2401 or OEM size recommendations

🏭 CNL Industrial Advantage

  • Full stock of G-Series O-Rings (JIS compliant)

  • Rubber materials: NBR, Viton®, EPDM, Silicone, HNBR

  • Precision molding, ISO/RoHS certified

  • Fast delivery for standard and custom orders