Kunkle 917 Safety Relief Valve — 1-1/4″ x 2″ NPT, G Orifice (Vacuum, 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 1-1/4″ x 2″ NPT variant — G orifice, 0.553 in² — is available across a 6–29 in Hg range for Vacuum service with a Viton (FKM) seat, carrying Non-code — no ASME stamp. Temperature range -10°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.