Attributes . Machined components are manufactured using solid bar stock; Stainless steel retaining rings and springs maximize corrosion resistance and extend service life. Steel componentry is plated using ROHS Compliant Trivalent Chrome. Nitrile (Buna-N) seals are standard; Main coupler valve has a bonded face-seal to improve seal integrity during pressurized connection/disconnection. Redundant O-Ring on the coupler body will engage nipple for secondary sealing support. Coupling has a PTFE back-up ring on the valve sleeve to extend service life. . Names