Pipes and Valves: Valve Types and Operation

Describe the basic purpose of a valve. Identify the basic components of a valve. Identify the valves that are commonly classified. Describe the basic components and operation of a gate valve. Describe the basic components and operation of common types of globe valves. Describe the basic components and operation of a plug valve, a ball valve, and a butterfly valve. Describe the basic components and operation of a diaphragm valve. Describe the basic components and operation of a swing check valve, a lift check valve, and a ball check valve. Describe how a handwheel is used to operate a valve. Describe how a handle is used to operate a valve. Identify and describe common types of pneumatically, hydraulically, and electrically powered mechanical operators for valves.