Fitting & Accessories

Part # CPR 14017000 Stand-alone Fuel Pressure Housing w/AN-2 fittings MSRP $ 19.00

Part # CPR 3001016 74 Micron Stainless (great for NOS; for 3001012) EACH MSRP $ 57.00

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ENGINE KIT STAINLESS STEEL CROSS-OVER FUEL BARS FOR RETURN LESS ENGINES - LEAK-FREE FULL SYSTEMS

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Part # CPR 6001037 Fuel Injector Bung (weld-in Boss) - 1.5" inches long MSRP $ 13.00 EA

Part # CPR 6001038 Fuel Injector Bung (weld-in Boss) - 2" inches long MSRP $ 13.00 EA

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CPR 1401405- 8 AN Adapter Feed Adapter Feed 5.7 or 6.1 Hemi / SRT 4, large AN-8 size MSRP $ 45.00 EA

CPR 1401405 - 8 AN Adapter Feed 2007 GT500 Mustangs, large AN-8 size MSRP $ 45.00 EA

PART # CPR 1401200 RETURN-LESS Adapter Feed : Big AN-8 2005 MUSTANGS MSRP $ 40.00 EA

PART # CPR 1401602 1979-95 Ford EFI stock fuel rail fittings to -8 hose MSRP $ 57.00

PART # CPR 1401500 1979-2007 FORD RETURN SYSTEMS Hardware Install Kit MSRP $ 79.00

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O-ring boss seal

Why does CPR used ORBS ,

Back in the day 1999 had NPT at the end of our fuel rails but in Dec 2001 at the PRI SHOW WE every one that we swith over to the ORBS

SHOW THE CPR-O-Ring boss seal is a technique for joining two fluid-carrying pipes, hoses or tubing. In an o-ring boss (abbreviated ORBS) system, a male threaded part is inserted into a female threaded part, providing a mechanical seal. This system differs from others in that an additional nut is tightened over an o-ring into a beveled area that creates an excellent seal.

This system is used most frequently in hydraulics, although it has been applied to many other systems including vacuum pumps, such as many Robinair pumps, in which the intake tee has an o-ring boss seal on the bottom. Being a relatively rare system, it is often confused with others, most commonly NPT. While the threads sometimes fit (although very inexactly), o-ring boss seal systems should never be used with any other as leaks are common when using such an improper method. Under high fluid pressures seen with hydraulic use, a failure of the threads could be deadly!

Because ORBS adapters are relatively rare, one can be fashioned using a 37 degree AN (Army/Navy) flare fitting because the threads are compatible in diameter, pitch and spacing. To do this, a suitable o-ring, washer and nut are obtained separately. The flared end of the male AN flare is machined off. Optionally, a chamfer tool (or, if one cannot be obtained, a drill bit) can then be used to knock the inside shoulder off and make a reverse or inward angle that will smooth the flow of the fluid into the fitting bore. The last step is often unnecessary because most applications don't require a smooth flow of fluid unless operating at an extremely high flow rate.

This system has the advantage of being able to be tightened mechanically before being sealed. Most threaded systems, such as NPT, have a seal provided by a taper in the thread, so it is difficult to orient both ends of the hose, pipe or tube so that it is not twisted. In the o-ring boss system, this problem is eliminated because the threads do not seal the connection and therefore can be rotated at least a full revolution before they are sealed while maintaining a proper mechanical connection. The orientation problem could also be solved with a suitable union.

tech line 248-379-3565

O-ring boss seal