Japan, Nachi
NACHI SCW Series Solenoid Valve with Monitoring Switch (SCW-G03)

Made in: Japan
Manufacturer: NACHI
Model: SCW Series (SCW-G03)
Features
This solenoid valve monitors the valve’s direction switch position and can signal output. It operates the switch in sync with the valve, ensuring dependable output. Unlike previous methods using magnetic or proximity sensors, this design minimizes temperature drift and hysteresis.
Primary specification
| Series | SCW-G03 |
| Type | Poppet type |
| Max, working pressure | 21 MPa |
| Max.flow | 50 L/min |
| Switch specifications | rated voltages DC24V Maximum load current: 100mA Residual voltage: max 1.2V |
Working principle of SCW Series
When the needle valve is neutral, fixed and moving contacts touch, allowing electrical conduction. When the solenoid coil activates and the needle valve moves, these contacts stop conducting electricity.
Valve pressure loss

| Operation symbol | JIS symbol | SOL. OFF B → A | SOL. ON | |
|---|---|---|---|---|
| A → B | B → A | |||
| AR | ![]() | c | a | – |
| ARC | ![]() | c | a | b |
Application
This valve is suitable for use in designing and manufacturing mechanical equipment meeting safety standards such as ISO 12100 and JIS standard (JIS B 9700).

Mounting dimensions
The installation dimensions of the gasket surface are ISO 4401-03-02.
However, only use the A and B ports.



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