I. Introduction
O-rings are critical sealing components widely used in hydraulic, pneumatic, and filtration systems. Filter O-Ring Selection Guide: Material, Size & Application Tips. Proper selection ensures reliable sealing performance and long service life.
II. Material Selection
| Material | Temp Range | Applications |
|---|---|---|
| NBR (Nitrile) | -40 to 120 C | General purpose, oil resistant |
| EPDM | -50 to 150 C | Water, steam, chemical |
| Viton (FKM) | -20 to 200 C | High temp, aggressive chemicals |
| Silicone | -60 to 200 C | Food grade, medical |
| PTFE | -200 to 260 C | Extreme chemical resistance |
III. Size Standards
O-ring sizes follow AS-568 (American Standard) and JIS B 2401 (Japanese Industrial Standard). When selecting O-rings for filter housings, always measure the groove dimensions and cross-section requirements.
