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Quick Answer: An X-ring quote depends on the inside diameter, cross section, material, hardness, quantity, and operating conditions. CORASEALS can provide pricing when the fluid, temperature, pressure, speed, and groove dimensions are confirmed. Send a drawing or sample photo for the fastest review.
An X-ring is a four-lobe seal profile. The seal works in static and dynamic applications such as hydraulic cylinders, pneumatic valves, fluid transfer systems, and pump housings. The quote cannot be based only on a part number because the same X-ring profile may be listed under different supplier codes.
To issue an X-ring quote, CORASEALS needs the actual size and service conditions. The price depends on material, hardness, tolerance, quantity, and whether the size is a standard mold item or a custom machined or molded part.
Most X-ring sizes are ordered by inside diameter and cross section. Some drawings use outside diameter, so the unit must be stated clearly. A drawing that shows ID, cross section, groove width, and groove depth reduces the chance of sizing errors.
If the X-ring fits an existing O-ring groove, send the current O-ring size or the groove dimensions. The four-lobe profile may use a standard O-ring groove in many cases, but the fit should be confirmed with the supplier. The required squeeze and fill volume depend on the groove and the cross section.
Some X-ring sizes are listed by AS568 or ISO 3601 dash numbers. If a dash number is used, include the actual ID and cross section too. Dash numbers can vary by standard and supplier.
The material is selected by the fluid and the operating temperature. The table below lists common X-ring material options and their typical service use.
| Material | Common Use | Key Limitation |
|---|---|---|
| NBR | Mineral oil, hydraulic oil, general industrial service | Limited high temperature range and poor resistance to strong acids |
| HNBR | Mineral oil and higher heat than standard NBR | Not recommended for strong polar solvents in many grades |
| FKM | Hot oil, fuel, many chemicals | Not recommended for steam or hot water in many grades |
| EPDM | Water, steam, brake fluid | Not compatible with most mineral oils |
| FFKM | Aggressive chemicals and high temperature | High material cost |
| Silicone | Low temperature, food and medical service in selected grades | Poor mechanical strength and not suitable for mineral oil |
Common hardness options include Shore A 70, Shore A 80, and Shore A 90. The correct hardness depends on pressure, clearance, and whether the application is static or dynamic.
Send the following details to CORASEALS for an X-ring quote.
Send the inside diameter, cross section, material, hardness, operating conditions, groove dimensions, and quantity. Include a drawing or sample photo when possible.
Yes. Provide the dimensions in mm or inch. State clearly whether the dimension is ID × cross section or ID × OD.
NBR and HNBR are common for mineral hydraulic oil. FKM may be selected for higher temperature or more aggressive oil. Confirm the fluid type and maximum temperature before selecting the material.
Standard sizes may be quoted quickly. Nonstandard sizes may require tooling and a separate lead time. Send the exact dimensions for a stock check.
A sample or photo helps identify the profile. Dimensions are still required. Add a ruler or caliper measurement to the photo if no drawing is available.
For an X-ring quote, send CORASEALS the seal type, inside diameter, cross section, material, hardness, operating temperature, pressure, medium, speed, groove dimensions, drawing or sample photo, and required quantity. The quote will then include pricing, availability, and lead time based on the correct size and material.
