tailieunhanh - CONTROL VALVE HANDBOOK Episode 1 Part 2

Tham khảo tài liệu 'control valve handbook episode 1 part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter 1. Introduction to Control Valves LOADING PRESSURE CONNECTION DIRECT-ACTING ACTUATOR DIAPHRAGM CASING DIAPHRAGM PLATE ACTUATOR SPRING ACTUATOR STEM SPRING SEAT SPRING ADJUSTOR STEM CONNECTOR YOKE TRAVEL INDICATOR INDICATOR SCALE DIAPHRAGM AND STEM SHOWN IN UP POSITION W0363-1 PUSH-DOWN-TO-CLOSE VALVE BODY ASSEMBLY VALVE PLUG STEM PACKING FLANGE ACTUATOR YOKE LOCKNUT PACKING PACKING BOX BONNET VALVE PLUG CAGE SEAT RING GASKET W0989 SEAT RING SPIRAL WOUND GASKET BONNET GASKET CAGE GASKET Figure 1-3. Major Components of Typical Sliding-Stem Control Valve Assemblies 7 Chapter 1. Introduction to Control Valves DIAPHRAGM PLATE DIAPHRAGM CASINGS ACTUATOR SPRING SPRING SEAT SPRING ADJUSTOR STEM CONNECTOR YOKE W0364-1 IL DIAPHRAGM AND STEM SHOWN IN DOWN POSITION TRAVEL INDICATOR INDICATOR SCALE W6434 IL Figure 1-6. Bellows Seal Bonnet LOADING PRESSUR CONNECTION ACTUATOR STEM Figure 1-4. Typical Reverse-Acting Diaphragm Actuator W0667 IL Figure 1-5. Extension Bonnet and transmits motion force from the actuator to the valve. Actuator Stem Extension An extension of the piston actuator stem to provide a means of transmitting piston 8 motion to the valve positioner figure 1-7 . Actuator Stem Force The net force from an actuator that is available for actual positioning of the valve plug. Chapter 1. Introduction to Control Valves ACTUATOR STEM CYLINDER PISTON SEAL YOKE W7447-1 IIL CYLINDER CLOSURE SEAL PISTON CYLINDER SEAL SEAL BUSHING TRAVEL INDICATOR ACTUATOR STEM SEAL Figure 1-7. Typical Double-Acting Piston Actuator with Bias Spring TRAVEL INDICATOR SCALE STEM CONNECTOR Angle Valve A valve design in which one port is co-linear with the valve stem or actuator and the other port is at a right angle to the valve stem. See also Globe Valve. Bellows Seal Bonnet A bonnet that uses a bellows for sealing against leakage around the closure member stem figure 1-6 . Bonnet The portion of the valve that contains the packing box and stem seal and can guide the stem. It provides the