Valvole industriali carry significant importance in various industrial applications.
Whether controlling the flow of liquids or gases or completely halting the supply, these valves are pivotal in a lot of contexts.
However, determining whether a water valve, such as a gate valve, ball valve, globe valve, or butterfly valve, is open or closed might pose a daunting challenge for some.
Hopefully, this simple guide — telling if the valve’s open and close direction — will provide you with substantial information.
Valve Position Indicator: A Simplified Guide
Understanding how to identify whether valves are open or closed is crucial for effective operation in various industries.
Below are concise descriptions of different types of valves followed by simple indicators on how to identify their open and closed positions.
Additionally, we included how to physically open and close each type for practical application.
Valvola di ritegno
UN valvola di ritegno is a one-way valve that allows flow in one direction, preventing backflow.
- How to tell if open: Align the arrow on the valve with the direction of flow.
- How to tell if closed: If the arrow points against the intended flow.
- How to open: Typically opens automatically with forward flow.
- How to close: No manual closing; relies on reverse flow to close.
Valvola a saracinesca
UN valvola a saracinesca features a gate or wedge that lifts to allow flow when open and drops to block flow when closed.
- How to tell if open: Handle parallel to the pipeline.
- How to tell if closed: Handle perpendicular to the pipeline.
- How to open: Turn the handwheel or wheel-like handle clockwise.
- How to close: Turn the handwheel or wheel-like handle counterclockwise.
Valvola a sfera
UN valvola a sfera uses a rotating ball to control flow, with a handle for easy operation.
- How to tell if open: The handle aligns with the pipeline.
- How to tell if closed: The handle is perpendicular to the pipeline.
- How to open: Turn the lever or handle 90 degrees parallel to the pipeline.
- How to close: Turn the lever or handle 90 degrees perpendicular to the pipeline.
Valvola a farfalla
UN valvola a farfalla is characterized by a disk that rotates to regulate flow, often lighter and quicker to operate.
- How to tell if open: The handle is parallel to the pipeline.
- How to tell if closed: The handle is perpendicular to the pipeline.
- How to open: Rotate the lever or handle 90 degrees parallel to the pipeline.
- How to close: Rotate the lever or handle 90 degrees perpendicular to the pipeline.
Valvola a globo
UN valvola a globo is indicated by a disk that moves perpendicular to the seat to control flow.
- How to tell if open: Handle parallel to the pipeline.
- How to tell if closed: Handle perpendicular to the pipeline.
- How to open: Turn the handwheel or wheel-like handle counterclockwise.
- How to close: Turn the handwheel or wheel-like handle clockwise.
These additional instructions provide practical guidance on opening and closing each valve type.
Chiave da asporto
Recognizing whether a valve is open or closed is fundamental in industrial settings.
For a gate valve, check the position of the gate; in a ball valve, the handle aligns with the pipeline for opening and perpendicular for closing; a globe valve involves turning the handwheel; for a butterfly valve, the disc’s orientation matters.
Familiarity with these visual cues ensures efficient operation in various applications.
