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Articles on O-rings, hydraulic and mechanical seals and gaskets from Conquest Seal in Orange, California. Each one is reviewed before it is published; the guides cover the sizing and material questions in more depth.
Gasket material by temperature and media
The temperature at the flange and the fluid it holds decide the sheet family before anything else.
How to measure an O-ring: ID, OD and cross-section
An O-ring is sized by two numbers: the inside diameter (ID) and the cross-section (CS), which is the thickness of the rubber cord.
Is a Brand-Name Fluoroelastomer the Same as FKM?
Not exactly: Viton® is a registered trademark for the FKM polymer families of one maker, Chemours, which took the brand over from DuPont.
O-ring backup rings: when and how to size them
An O-ring needs a backup ring whenever system pressure, clearance gap, and compound softening combine to push the seal into the extrusion gap between mating parts.
O-ring failure modes: how to read a failed seal
A failed O-ring usually shows its cause on its surface. A chewed edge on the low-pressure side is extrusion, a flat-sided oval is compression set, a corkscrew cut is spiral failure, and blisters are gas decompression.
How to read an AS568 o-ring size chart
An o-ring size chart lists the AS568 dash number for a standard seal along with its inside diameter, cross-section diameter, and the tolerance band each dimension carries.
X-ring vs O-ring: when a four-lobed seal makes sense
An X-ring is an O-ring with a four-lobed cross-section instead of a round one.
Viton is a trademark of The Chemours Company. No affiliation or endorsement is implied.
Orders are handled under Conquest Seal's AS9100D quality management system, whose certificate scope includes distribution.
Send the part number and we quote it
Part number or drawing, compound if you know it, and the quantity. A Conquest representative reads every request and replies. Quotes answered within one business day. A person answers (714) 632-9830, Pacific business hours.
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