Dilihat 855
MATERI
A. Control Valves
1. Types of control valves
- Definition of a control valve
- Various types of control valves
- Equal percent
- Linear
- Quick opening
- Flow characteristic of various valves
- Pressure drop in various valves (K factor)
- Choosing a correct valve for intended application
- Basics of selection and sizing of control valves and matching actuator, meeting system operational requirements etc.
- Air valves, safety relief valves and breather cum relief valves – test procedures
- Performance evaluation of control valves and actuators
- Cavitations in control valves
- Diagnostics for valve actuators
- Different types of control valves: globe valves, butterfly, eccentric disk, ball, rotary plug, diaphragm and pinch valves
- Definition and introduction of pressure safety valve
- Pressure safety valve design
- Pressure safety valve operation
- Pressure safety valve installation
- Pressure safety valve trouble shooting
- Pressure safety valve servicing
- Gas sizing non-choked flow
- Gas sizing choked flow
- Steam sizing
- Liquid sizing
- Example of calculation
- Gasket selection
- Common valve problems: high pressure drops and cavitasions
- Classification and types of pumps
- Pump operation: priming and cavitation
- NPSH – Available and Required, NPSH margin
- Pump performance curves
- Head – capacity curve [H – Q]
- Power – capacity curve [P – Q]
- Efficiency – capacity curve [η – Q]
- System curve, best efficiency point [BEP]
- Pump selection and specification
- Criteria for pump selection, specification / data sheet
- Affinity laws, drive rating selection
- Pump performance testing and check points
- Operation, maintenance & troubleshooting aspects of pumps
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