Safety valves

Spirax Sarco safety valves protect steam, gas, air and liquid systems by providing a controlled discharge path when pressure rises above the safe limit of the equipment being protected. Typical overpressure causes include blocked outlets, regulator failure, cooling failure, power loss, fire and other upset conditions, so the valve should be treated as a primary protective device rather than an optional accessory. Safety valves are especially important downstream of pressure reducing stations, on pressure vessels and on heat transfer equipment where an upstream failure could otherwise expose the system to pressure beyond its design limit. Correct selection depends on fluid type, required relieving capacity, materials, discharge arrangement and the code framework that applies to the installation, not just on line size alone. Set pressure must stay within the maximum allowable pressure of the protected equipment while maintaining enough margin above normal operating pressure to avoid chatter, frequent lifting and premature seat wear. The Spirax Sarco range covers general industrial, stainless and clean-service duties, making this route a useful starting point for users who need reliable overpressure protection integrated into wider pressure control and process safety strategy.