O形圈 规格表
3种规格数据
O型圈是安装在槽中、靠压缩的橡胶截面防止流体或气体泄漏的密封件。运动用(P系列)和固定用(G系列)的槽尺寸不同。材质按使用环境选择：NBR(通用)、FKM(高温耐油)、EPDM(蒸汽/水)。
常见问题 (FAQ)
What is the difference between P-series and G-series O-rings?
P-series is for dynamic seals (moving parts like pistons/cylinders); G-series is for static seals (pipe fittings, flanges). P-series has a thicker cross-section; G-series has a thinner section and larger bore.
What is the difference between NBR and FKM O-ring materials?
NBR (nitrile rubber) is economical and widely used for oil and pneumatic applications (−30 to 120°C). FKM (fluoroelastomer) offers superior heat and chemical resistance (−20 to 200°C).
What should be noted when designing O-ring grooves?
Maintain compression ratio 8–30% (recommended 15–25%) and fill rate ≤85%. Excessive compression causes permanent deformation; insufficient causes leakage. Corner radius (R0.2–0.4) on groove edges is essential.