A flow control valve, such as a needle valve, can block all fluid flow by completely obstructing the passage through which the fluid travels.
Flow Control Valves and Complete Flow Blockage
Flow control valves are designed to regulate the rate at which fluid flows through a system. While they are often used to reduce flow, they can also completely stop it. The mechanism by which they achieve this depends on the valve's design.
Needle Valve Example
As stated in the provided reference, a common type of flow control valve is the needle valve. This valve uses a needle-like plunger to control fluid flow by adjusting its position.
- How it Works: The needle is moved into or out of a valve seat.
- Partial Closure: When the needle is partially closed, it reduces the size of the opening, thus decreasing the flow rate.
- Complete Closure: When the needle is fully seated, it completely blocks the opening, preventing any fluid from passing through.
Summary
| Feature | Description |
|---|---|
| Valve Type | Needle Valve (Example) |
| Blocking Mechanism | A needle-like plunger that moves into a valve seat. |
| Complete Blockage | Occurs when the needle is fully seated, completely obstructing fluid flow. |
