Auto Drain Valves – AD
The AD402/600 series auto drain valve automatically discharges drainage. It is highly resistant to dust and corrosion. This series operates in a reliable manner, without requiring human operators. A case guard is provided as standard equipment.

AD402/600, Auto Drain Valve
The AD402/600 series auto drain valve automatically discharges drainage. It is highly resistant to dust and corrosion. This series operates in a reliable manner, without requiring human operators. A case guard is provided as standard equipment.
- Auto drain valve
- Highly resistant to dust and corrosion
- Operates reliably without human operator
- Case guard provided as standard equipment
- Rc(PT) bore size: 1/4, 3/8, 1/2, 1

AD402-A, Auto Drain Valve
The AD402-A is the improved version of SMC's proven AD402 auto drain design. These enhancements include an improved resistance to foreign matter, increased discharge rate and reduced weight.
- Improved environmental resistance with transparent bowl guard
- 360° visibility of bowl contents
- Reduced maintenance space and easier maintenance
- Now with three bowl material choices: polycarbonate, nylon (new), aluminum
- Top and side entry types available
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