The Bailey 700 Series of Safety Relief Valves offers a broad spectrum of protection against over-pressure for vital services such as steam,air, gases, water and process fluids. The 700 Series Safety Relief Valves offer full protection,with maximum discharge capacity provided by features such as full lift, top guided construction and unobstructed seat bore. No matter what the application, all valves are designed for leakfree operation thanks to the choice of various seating materials.