EN/GOST/ASME VALVE For pipeline
What are Valves?
Valves are mechanical devices that controls the flow and pressure within a system or process. They are essential components of a piping system that conveys liquids, gases, vapors, slurries etc..
Different types of valves are available: gate, globe, plug, ball, butterfly, check, diaphragm, pinch, pressure relief, control valves etc. Each of these types has a number of models, each with different features and functional capabilities. Some valves are self-operated while others manually or with an actuator or pneumatic or hydraulic is operated.
Class Ratings
Pressure-temperature ratings of valves are designated by class numbers. ASME B16.34, Valves-Flanged, Threaded, and Welding End is one of the most widely used valve standards. It defines three types of classes: standard, special, and limited. ASME B16.34 covers Class 150, 300, 400, 600, 900, 1500, 2500, and 4500 valves.
CLASSIFICATION OF VALVES BASED ON MOTION
Valve Types | Linear Motion | Rotary Motion | Quarter Turn |
Gate | YES | NO | NO |
Globe | YES | NO | NO |
Plug | NO | YES | YES |
Ball | NO | YES | YES |
Butterfly | NO | YES | YES |
Swing Check | NO | YES | NO |
Diaphragm | YES | NO | NO |
Pinch | YES | NO | NO |
Safety | YES | NO | NO |
Relief | YES | NO | NO |
Valve Types | Linear Motion | Rotary Motion | Quarter Turn |