Sourced and supplied across Saudi Arabia
An O-ring is defined by three things — inside diameter, cross-section and compound — and it is the compound that decides whether the seal survives. The two failure modes worth naming are chemical and thermal, and they look different. Chemical incompatibility swells or hardens the ring over weeks; the joint weeps and everyone blames the fitter. Heat is faster and simpler: an elastomer above its working range takes a permanent set and stops springing back. There is a third that is specific to gas service. A ring that has absorbed high-pressure gas and is then decompressed quickly can tear itself apart from the inside, which is explosive decompression, and rings for that duty are a specific specification rather than a grade choice — it matters on gas systems across the Eastern Province. State the medium, the temperature range and the pressure, and say whether the ring is static or on a moving rod or piston, because dynamic duty changes the surface finish and the groove.
The more of this you send, the closer the first quotation lands.
| Size | Inside diameter and cross-section, or the standard size code |
|---|---|
| Sizing standard | ISO 3601, AS568, or a metric series |
| Compound | NBR, HNBR, FKM, EPDM, silicone or PTFE-encapsulated |
| Medium | The fluid or gas, including additives and cleaning chemicals |
| Temperature range | Continuous and peak, at the seal not in the process |
| Pressure | Operating pressure, and whether it cycles |
| Explosive decompression | State if in high-pressure gas service with rapid depressurisation |
| Static or dynamic | Face seal, rod, piston or rotary — it changes the groove design |
| Hardness | Shore A — harder compounds resist extrusion at high pressure |
| Back-up rings | Required where extrusion into the clearance gap is a risk |
| Approvals | State if potable water, food contact or sour service approval is needed |
| Quantity | Pieces per size and compound, and any kit make-up |
Select one and it travels with your enquiry. Not sure? Leave it and describe the application instead.
We source to specification. Send your requirement and we will come back with options, lead time and pricing.