Kunkle 917 Safety Relief Valve — 2″ x 3″ NPT, J Orifice (Air/gas ASME Section VIII, Viton (FKM) Seat)

The Kunkle 917 is a full-nozzle safety relief valve with all-stainless construction and a resilient soft seat, giving superior leak-free performance versus a metal seat. This 2″ x 3″ NPT variant — J orifice, 1.415 in² — is available across a 3–500 PSI range for Air/gas ASME Section VIII service with a Viton (FKM) seat, carrying ASME Section VIII (UV stamp), National Board Certified. Temperature range -10°F to 290°F, set by the seat material. Neoprene, Silicone, Kalrez®, Aflas® and HNBR seats are also available — ask when requesting a quote. Threaded side outlet allows piped-off discharge to eliminate fugitive emissions.