The Midland Haldex DA34105 PURest Air Dryer Assembly delivers five-stage desiccant treatment to remove moisture, oil aerosols, and contaminants from compressed air brake systems. It handles a flow capacity of 34 SCFM with a maximum working pressure of 150 psi, a safety relief pressure of 175 psi, and secondary pressure protection at 235 psi. The 210 cu. in. internal purge volume supports thorough regeneration cycles. Inlet air temperature range spans -40°F to +175°F, making it suitable for cold-climate operation without a heater element. The unit ships with a universal mounting bracket that aligns with Pure Air Plus, DRYest, AD-type, and SS-type bolt patterns for straightforward retrofits. Inlet port is positioned on the left. OEM cross-reference: N4253AD. A genuine Midland Haldex part sold by Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
5-stage multi-treatment desiccant cartridge for thorough air system drying
Flow capacity: 34 SCFM at up to 150 psi maximum working pressure
Safety relief at 175 psi; secondary pressure protection at 235 psi
Inlet air temperature range: -40°F to +175°F (no heater element)
Integrated turbo protection with 2 psi pressure drop at 15 SCFM/120 psi
Universal mounting bracket fits Pure Air Plus, DRYest, AD-type, and SS-type bolt patterns; left-side inlet port
Tech Specs
- Stages of Drying: 5
- Flow Capacity: 34 SCFM
- Maximum Working Pressure: 150 psi
- Safety Relief Pressure: 175 psi
- Secondary Pressure Protection: 235 psi
- Internal Purge Volume: 210 cu. in.
- Inlet Air Temperature: -40°F to +175°F
- Heater: None
- Integrated Turbo Protection Pressure Drop: 2 psi @ 15 SCFM/120 psi
- Mounting: Universal bracket included; inlet port - left
- OEM Part Number: N4253AD
- Compatible Bolt Patterns: Pure Air Plus, DRYest, AD-type, SS-type air dryers
