Valves DOE-HDBK-1018/2-93 OBJECTIVES TERMINAL OBJECTIVE 1.0 Without references, DESCRIBE the construction and operation of a given type of valve, valve component, or valve actuator, as presented in this module. ENABLING OBJECTIVES 1.1 DESCRIBE the four basic types of flow control elements employed in valve design. 1.2 DESCRIBE how valve stem leakage is controlled. 1.3 Given a drawing of a valve, IDENTIFY the following: a. Body b. Bonnet c. Stem d. Actuator e. Packing f. Seat g. Disk 1.4 Given a drawing of a valve, IDENTIFY each of the following types of valves: a. Globe b. Gate c. Plug d. Ball e. Needle f. Butterfly g. Diaphragm h. Pinch i. Check j. Stop check k. Safety/relief l. Reducing 1.5 DESCRIBE the application of the following types of valves: a. Globe b. Gate c. Plug d. Ball e. Needle f. Butterfly g. Diaphragm h. Pinch i. Check j. Safety/relief k. Reducing 1.6 DESCRIBE the construction and principle of operation for the following types of valve actuators: a. Manual b. Electric motor c. Pneumatic d. Hydraulic e. Solenoid Rev. 0 Page vii ME-04