01
FSY series 3-way pneumatic control valve / direct-acting type (100 Series)
Detailed description
The FSY Series 100 model is a 3-way pneumatic control valve featuring direct-acting operation and direct piping configuration. Designed as a single-unit component, it serves stand-alone equipment and smaller automation applications where straightforward installation and reliable performance are primary considerations. Its direct piping format eliminates the need for manifold bases, allowing simple tube connections directly to the valve body.
Installation Method
The valve accepts pipe connections directly without requiring any intermediate mounting plate or sub-base. All ports are integrated into the body casting, enabling rapid attachment of supply lines and actuator connections. This independent mounting approach reduces the number of components needed for installation and simplifies initial system assembly.
Maintenance Characteristics
When replacement becomes necessary, the individual unit can be exchanged after disconnecting the attached tubing. The procedure does not require dismantling adjacent components or removing manifold assemblies, keeping maintenance tasks straightforward. This direct access simplifies servicing in applications where valves are mounted in accessible locations.
Physical Footprint
The unit occupies minimal space due to its compact construction and the absence of a base plate. Mounting flexibility allows placement in confined areas where larger valve assemblies would not fit. The dimensional envelope suits applications with restricted panel space or crowded equipment layouts.
Flow Performance
Flow capacity is moderate, making this valve appropriate for smaller pneumatic circuits with limited air consumption requirements. It performs well in applications such as piloting larger valves, operating small bore cylinders, or controlling air signals in sensing circuits. For higher flow demands, alternative series with larger port sizes would be more suitable.
Cost Considerations
Initial investment remains lower than manifold-mounted alternatives because no separate base plate purchase is required. The valve includes all necessary porting in the base unit, reducing the total component count and associated acquisition costs. This makes it an economical choice for applications where only one or a few valves are needed.
Operational Characteristics
As a direct-acting valve, the solenoid moves the spool directly without requiring pilot pressure, ensuring operation even at zero inlet pressure. This feature proves useful in vacuum service or low-pressure applications where pilot-operated valves may not function reliably. Response is consistent across the rated pressure range.
Graphic symbols
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FSY114(A, UT)
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FSY124(A)
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Flow characteristics quality table
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Valve model |
Function |
Type |
Use pressure range(MPa) |
Scenarios of use in vacuum (MPa) |
Port size |
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1-way |
3-way |
1.3-way |
2-way |
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V114 |
N.C. |
Standard |
0~0.7 |
-100kPa~0.6 |
-100kPa~0 |
M5x0.8 |
M5x0.8 |
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V114A |
N.C. |
high flow A |
0~0.7 |
-100kPa~0.6 |
-100kPa~0 |
M5x0.8 |
M5x0.8 |
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V114UT |
N.C. |
high flow U |
0~0.6 |
-100kPa~0.5 |
-100kPa~0 |
M5x0.8 |
M5x0.8 |
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V124 |
N.C. |
Standard |
0~0.7 |
-100kPa~0 |
-100kPa~0.6 |
M5x0.8 |
M5x0.8 |
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V124A |
N.C. |
high flow A |
0~0.7 |
-100kPa~0 |
-100kPa~0.6 |
M5x0.8 |
M5x0.8 |
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Valve model |
Weight (g) |
Flow characteristics |
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Direct lead-out type |
L or M shaped socket type |
1→2(3→2) |
2→3(2→1) |
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C[dm3/s∙bar)] |
b |
Cv |
C[dm3/s∙bar)] |
b |
Cv |
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V114 |
SY1□4:13(27) SY1□4A:16(30) |
SY1□4:12(26) SY1□4A:15(29) SY114UT:15(29) |
0.037 |
0.11 |
0.08 |
0.054 |
0.35 |
0.015 |
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V114A |
0.076 |
0.07 |
0.016 |
0.099 |
0.23 |
0.024 |
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V114UT |
0.16 |
0.18 |
0.038 |
0.15 |
0.34 |
0.041 |
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V124 |
0.054 |
0.35 |
0.015 |
0.037 |
0.11 |
0.008 |
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V124A |
0.099 |
0.23 |
0.024 |
0.076 |
0.07 |
0.016 |
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outline dimension diagram
