SMC ADH4000-N04B Heavy Duty Automatic Drain Valve

The SMC ADH4000-N04B Heavy Duty Auto Drain Valve automatically drains condensate from compressed-air lines without electrical power, leveraging a float-type mechanism that discharges condensate while preserving existing piping. It uses a 1/2" NPT connection and is configured as Normally Open (N.O.) within the ADH4000 heavy-duty auto drain family. Operating pressure ranges from 0.05 to 1.6 MPa (7.5 to 232 psi), with a maximum specification pressure of 1.6 MPa (232 psi). Condensate discharge reaches up to 400 cc/min (0.024 m3/h) at 0.7 MPa, ensuring reliable removal of water from pneumatic lines. The unit weighs about 1.2 kg, with bracketed variants typically around 1.3 kg. Designed for maintenance without changing existing piping, this valve suits industrial pneumatic systems requiring automatic, power-free drainage, such as setups with air dryers and filters where condensate management is critical.