Multipoint flush distribution for a single seal (API preference for Cat. 1), the APItex standard allows homogeneous distribution of flush fluid and better cleaning and cooling capability. Quench connections for single seal (API preference for Cat. 1), the APItex standard enables cleaning or inerting between seal and throttle bushing (e.g. prevention of oil cracking). The pump-ring device for dual seals allows the barrier fluid to circulate effectively for better seal cooling.