Piston actuated valve symbol
Also called Cylinder actuated valve
A piston actuated valve is moved by a pneumatic or hydraulic cylinder. Cylinders give high force and long strokes, so they suit large and fast-acting valves.
What the piston actuated valve symbol means
A piston actuated valve is moved by a pneumatic or hydraulic cylinder. Cylinders give high force and long strokes, so they suit large and fast-acting valves.
How it is drawn
A valve body with a stem rising to a rectangle with a line across it, the cylinder and piston.
The piston actuated valve symbol in each standard
Drawn as ISA 5.1 defines it, as on most US and international legends.
ISO 10628-2 does not draw actuators. Actuators come from ISO 14617-4, and how a valve is controlled is shown with the instrumentation, usually to IEC 62424.
German (DIN): Armatur mit Kolbenantrieb. See DIN P&ID symbols.
Where you see it on a P&ID
On large shutdown valves, gate valves and dampers.
Tag codes
The piston actuated valve is commonly tagged:
- XV
- SDV
- ESDV
Tag formats follow the project numbering procedure. For instruments, the letters follow ISA 5.1, explained on the instrument symbols page.
Related symbols
Frequently asked questions
What does the piston actuated valve symbol look like on a P&ID?
A valve body with a stem rising to a rectangle with a line across it, the cylinder and piston.
What is a piston actuated valve used for?
A piston actuated valve is moved by a pneumatic or hydraulic cylinder. Cylinders give high force and long strokes, so they suit large and fast-acting valves. You will find it on large shutdown valves, gate valves and dampers.
What tag does a piston actuated valve have?
It is commonly tagged XV, SDV, ESDV. The exact tag format comes from the project numbering procedure and the legend sheets.
Is the piston actuated valve symbol the same in ISA and ISO?
ISO 10628-2 does not draw actuators. Actuators come from ISO 14617-4, and how a valve is controlled is shown with the instrumentation, usually to IEC 62424. Companies vary the details, so always check the legend sheets at the front of the P&ID set.
What is the piston actuated valve called in German?
Armatur mit Kolbenantrieb. On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2.
- In production since 2014
- Thousands of daily users
- On MODEC FPSO projects since 2016