🔵How to Choose a Control Valve?
When choosing a #control_valve for a process, there are many things that must be considered, including the valve’s flow characteristic, its size, noise, the potential for cavitation or flashing damage, body and trim materials, actuator size and type, and its dynamic response to changes in the control signal.
✅How to Choose a Control Valve?
There are many types of valves available, each having its advantages and limitations. The basic requirements and selection depend on their ability to perform specific functions such as:
1- Ability to throttle or control the rate of flow.
2- Lack of turbulence or resistance to flow when fully open as turbulence reduces head pressure.
3- Quick opening and closing mechanism – rapid response is many times needed in an emergency or for safety.
4- Tight shut-off prevents leaks against high pressure.
5- Ability to allow flow in one direction only – prevents return.
6- Opening at a pre-set pressure – procedure control to prevent equipment damage
7- Ability to handle abrasive fluids – hardened material prevents rapid wear.
✅Based on control actions, they are linear motion and rotary motion
🔴Linear motion
Linear valves, also known as multi-turn valves, have a sliding-stem design that pushes a closure element into an open or closed position. Common valves are globe valves, gate valves.
🔴Rotary motion
Rotary motion is also known as quarter-turn valves. Quarter turn valves will be in their fully open or fully closed state (0°) after a 90° turn of the stem.
#controlvalve #MOV #onoffvalve #oilandgas
