External Emergency Valve often referred to as a "fire valve." Used to shut off flow in the event of fire. Fusible link holds open spring actuated lever. Mounts on external pipeline, thus the designation "external."

Ductile Iron body, Cap, Seat and Swing arm. Viton® encapsulated Teflon® O-Ring, Teflon® gasket, and stainless steel spring. But with 150# raised-face flange mounting connection.