The Haldex DRYest 12V Air Dryer is perfect choice for system purge applications. This extended service air dryer features a multi-treatment cartridge that employs five stages of cleaning to ensure dry system air. The integrated turbo protection and built-in heater prevents freezing and damage to the dryer, while the integrated muffler allows for superior quiet operation. With an inlet temperature range of -40 °F to 170 °F and a maximum working pressure of 150 psi, it is designed to provide reliable and efficient performance. The safety relief pressure is set at 160 psi for added protection. FleetPride is your First Click in Heavy Duty .