Safety Valves

Section 1: Types of Safety Valves Topic 1: Pressure and Rupture Disc Systems Define the term pressure. Explain how pressure is measured. Relate the use of rupture disc systems to limit pressure and protect personnel process and equipment. Express the economics involved in the decision to use rupture disc system.   Topic 2: Pressure Relief Devices Explain the use of relief valve systems to limit system pressure without performance interruption or shut down. Explain why a relief valve should not be used for steam and gas systems.   Topic 3: Types of Safety Valves Explain the use of safety valve systems to limit system pressure without performance interruption or shut down. Describe the parts and operation of a typical huddling chamber safety valve. Describe the parts and operation of a typical safety-relief valve and a typical pilot-actuated relief valve.   Section 2: Safety Valve Maintenance Topic 1: External Inspection and Troubleshooting Describe a procedure for performing an external inspection on a safety valve.   Topic 2: Disassembly and Inspection Describe procedures for disassembling a safety valve and inspecting its internal components.   Topic 3: Reassembly Describe procedures for reassembling and testing a safety valve before reinstalling it.   Topic 4: Reinstallation and Testing Describe procedures for reinstalling and testing a safety valve before putting it in service.