Oil and Gas
Seals for oil and gas service, matched to the medium
Hydrocarbon service narrows the compound list quickly, and sour or high-temperature service narrows it further. Conquest Seal supplies the O-rings, gaskets and machined parts that survive it, in the compounds the duty needs, from the manufacturers we source from. Send the compound your print names. If the print names only the service, send the medium, the temperature and the pressure, and we quote the compounds the makers rate for that service for you to choose from. Send the part number or the drawing with those three facts and a Conquest representative replies with the quote.
Photo by Conquest Seal.
- Standards
- AS568 and ISO 3601-1 sizes; ASTM D2000 sheet callouts; the compound sheet sets the medium and temperature limit
- Typical seals
- O-rings, hydraulic rod and piston seals, waterjet-cut gaskets, custom molded parts to print
- Materials
- Fluorocarbon for hydrocarbons and heat, perfluoroelastomer for sour and high-temperature service, HNBR for oil with heat, PTFE for back-up rings
- Quality
- Certificate of conformance naming the part number, the specification, the manufacturer, the lot and the quantity, with the maker compound sheet on request.
Three facts decide an oil and gas seal: what it sits in, how hot it gets, and what pressure it sees. A compound chosen on one of the three and not the other two is the usual reason a seal comes back.
Choosing the compound
Fluorocarbon covers most hydrocarbon service. Sour gas, steam and the hottest duty push past it and into the perfluoroelastomer grades, which cost more and are specified by grade rather than by family. The FFKM versus FKM guide is the honest comparison, including when the cheaper answer is the right one.
Explosive decompression
A seal that has absorbed gas under pressure can be damaged when the pressure drops quickly, and the compounds tested for it are a specific, shorter list. If your service sees rapid depressurization, say so with the inquiry.
Beyond the O-ring
Back-up rings, seats and wear parts are machined from PTFE and PEEK to print by the shops we source from. See machined plastic parts. Flat gaskets are cut to your drawing on our own waterjet.
What we supply
Product lines for oil and gas
O-rings
The part most people mean by a seal. We stock every AS568 size.
Gaskets
Seals the joint between two flat faces, cut to your drawing on our own waterjet in Orange, California, with no tooling.
Machined plastic parts
Seats, back-up rings, bushings and wear rings in PTFE, PEEK, UHMW and nylon, machined to your print by the shops we source from, where rubber would extrude or wear.
Rubber compounds
For prints that name a compound rather than a part. Standard grades and the AMS and MIL specification grades a drawing can call out.
Materials
What comes up on oil and gas prints
- Viton® (FKM) O-Rings
- The usual answer for hydrocarbons and heat.
- FFKM O-Rings
- Sour service and temperatures beyond what FKM will take.
- HNBR O-Rings
- Oil with heat, and better abrasion resistance than nitrile.
- PTFE O-Rings
- Back-up rings and chemical service where elastomers fail.
The compound named on your print governs. Send it with the part number and we quote that compound.
Viton is a trademark of The Chemours Company. No affiliation or endorsement is implied.
Related guides
What to send us
The part number or the drawing, the quantity, and the medium, temperature and pressure. Say whether the service is sour, because the print's compound has to be rated for it.
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