The Lonergan Valve 1-1/2 H 3 100PSIG Relief Valve D-12HS122-LF is a safety valve designed by Teledyne Farris. It features a flanged connection with a 2″ size and is made of durable steel material. This product is suitable for use in various industrial applications where safety and reliability are crucial factors. The valve is designed to provide a secure and efficient solution for regulating pressure and ensuring the safety of equipment and personnel in the workplace.