Kunkle 918 Safety Relief Valve — 3/4″ x 1-1/4″ NPT, E Orifice (Liquid ASME Section VIII, Buna-N (NBR) Seat)

The Kunkle 918 is a full-nozzle safety relief valve with bronze body and bonnet and a resilient soft seat, giving superior leak-free performance versus a metal seat. This 3/4″ x 1-1/4″ NPT variant — E orifice, 0.216 in² — is available across a 15–300 PSI range for Liquid ASME Section VIII service with a Buna-N (NBR) seat, carrying ASME Section VIII (UV stamp), National Board Certified. Temperature range -30°F to 250°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.