SMC AD402-04 – Automatic Pneumatic Drain Valve, 1/2 Inch Inlet, 3/8 Inch Drain Outlet

✅ SMC AD402-04 is an automatic drain valve from the AD402 Series, designed to automatically remove condensed water from compressed-air systems.

✅ The AD402-04 features an Rc1/2 inlet and 3/8-inch drain outlet, making it suitable for pneumatic air preparation equipment and industrial compressed-air systems.

✅ The valve uses a float-operated automatic drainage mechanism. As condensate accumulates to the required level, the float mechanism activates the drain and discharges the collected liquid.

✅ The AD402-04 is configured as a normally closed drain valve, meaning the drain passage remains closed when the required pressure condition is not present.

✅ The AD402 Series provides a maximum operating pressure of 1.0 MPa, proof pressure of 1.5 MPa and, for the N.C. type, an operating pressure range of approximately 0.15–1.0 MPa. Ambient and fluid temperature is approximately -5 to +60°C, without freezing.

Technical Specifications

✅ Product name: Automatic drain valve

✅ Brand: SMC

✅ Series: AD402

✅ Model: AD402-04

✅ Drain mechanism: Automatic float type

✅ Drain valve type: Normally closed N.C.

✅ Inlet port: Rc1/2

✅ Drain outlet: 3/8 inch

✅ Working medium: Compressed air

✅ Operating pressure range: 0.15–1.0 MPa

✅ Maximum operating pressure: 1.0 MPa

✅ Proof pressure: 1.5 MPa

✅ Ambient and fluid temperature: -5 to +60°C

✅ Bowl material: Polycarbonate

✅ Function: Automatic condensate drainage

Advantages

✅ Automatic condensate removal

✅ Simple and reliable float mechanism

✅ Reduces accumulated moisture in pneumatic systems

✅ Helps reduce corrosion and downstream equipment problems

✅ Rc1/2 inlet for industrial pneumatic systems

✅ 3/8-inch drain outlet for convenient drainage connection

Applications

✅ Air receivers

✅ Pneumatic filters

✅ Air compressors

✅ Compressed-air piping

✅ Air dryers

✅ Air preparation systems

✅ Automation production lines

✅ Industrial manufacturing plants

Hotline: 0787900099